Forum:Reasons why cards are Forbidden/Limited/List

List of Reasons for Why Cards are Forbidden/Limited
Card Name	Reasons
Forbidden
Apoqliphort Towers	Very powerful boss monster in Qliphorts. Easily Tribute Summoned due to Qli's swarming. A lot of Decks were incapable of removing this card due to its immunity to most effects and it reducing the ATK of Special Summoned monsters by 500, forcing them to run very specific counter cards like Diamong Dire Wolf. Not as powerful due to Master Rule 4, but is still a force to be reckoned with. This card is Unlimited in the OCG, since Utopia The Lightning, which can easily beat this card, is one of the most used cards since its release, making Towers a waste of resources.
Blaster, Dragon Ruler of Infernos	Incredibly powerful Dragon monsters. Can be Special Summoned easily from the hand or Graveyard by banishing any 2 Dragon monsters and/or monsters of their same Attributes from the hand or Graveyard. Can be put into just about any dragon Deck or Deck of their own attributes to add huge power and consistency. At more than 1, they can search another copy of themselves es when they're banished to Summon another Dragon Ruler, or when banished with Sacred Sword of Seven Stars or Gold Sarcophagus. The release of Number 95: Galaxy-Eyes Dark Matter Dragon was likely the final nail in the coffin of these 4 cards, as players could easily dump three of four Dragon Rulers into the Graveyard on turn 1 when Summoning Dark Matter Dragon for an easy OTK.
Redox, Dragon Ruler of Boulders
Tempest, Dragon Ruler of Storms
Tidal, Dragon Ruler of Waterfalls
Chaos Emperor Dragon - Envoy of the End	Can be Special Summoned easily, great effect, high ATK, deadly nuke and serious burn. Judgment Dragon destroys all cards, while this card sends all the cards, thus cards like Stardust Dragon and Starlight Road cannot stop it. If you don't finish off your opponent, but you use its effect while you control a monster like Sangan, you can easily gain an advantage over your opponent since they'll be topdecking and you'll have a monster. Key card in the infamous Yata-Garasu Lockdown. The release of Chaos Dragons sealed its fate because it can be searched by Eclipse Wyvern and can OTK with Dragon Rulers. This card is Unlimited in the OCG due to its errata, which makes it a Nomi monster, inflicts damage based on the opponent's cards, and prevents other card effects from being activated for the rest of the turn.
Cyber Jar	Destroys all monsters instantly. Unlike Morphing Jar #2, this has a set number of cards to get, allowing players to gain instant advantage easily. Swarms the field by itself and can create OTKs and can give either player crazy advantage. Can wipe out a whole field of boss monsters effortlessly. A bit slower and harder to use now with THRIO and Starlight Road in the game, but can still turn an entire game around in an instant.
Cyber-Stein	Can lead to easy OTKs with Fusions like Blue-Eyes Ultimate Dragon equipped with Megamorph, or can lead to an instant lockdown with Naturia Exterio or The Last Warrior from Another Planet. Cost is high, but can be circumvented if combined with DNA Surgery (calling Psychic-type) and Brain Research Lab or Telekinetic Charging Cell and if the effect goes through, it's devastating. Can be searched easily by Gear Gigant X. This card is Limited in the OCG.
Destiny HERO - Disk Commander	The effect is too powerful, turning ordinary revival cards into Pot of Greeds. There are way too many ways to revive it: Call of the Haunted, Monster Reborn, Limit Reverse, Kinka-byo, Graceful Revival, Soul Charge, Oasis of Dragon Souls, etc.
Djinn Releaser of Rituals	Prevents your opponent from Special Summoning when used for a Ritual Summon, and can be banished from the Graveyard to be used for a Ritual Summon as well. Mainly Forbidden due to abuse in the Nekroz archetype, where it was mainly used to Ritual Summon Nekroz of Clausolas, which can search Nekroz Cycle by its own effect, which can then Ritual Summon Clausolas from the Graveyard by using Djinn. This card is Unlimited in the OCG.
El Shaddoll Construct	Key Fusion Monster in Shaddoll Decks along with El Shaddoll Winda (below). Sets up combos by sending ANY "Shaddoll" card from your Deck to the Graveyard once Fusion Summoned, can send useful LIGHT monsters from the Deck to the Graveyard when using "Shaddoll Fusion", and can autokill any Special Summoned monster when it battles.
Elder Entity Norden	Powerful generic Fusion Monster that can revive any Level 4 or lower monster from your Graveyard for easy Rank 4 Xyz Summons or Synchro Summons with Instant Fusion, or can be used with Super Polymerization (Forbidden in the TCG) to fuse two of your opponent's Synchro or Xyz Monsters to make this card. Can be Summoned multiple times with Re-Fusion and Fusion Gate for OTK's and even FTKs. Enables draw loops when combined with Zoodiac Xyz Monsters, Fusion Substitute, Lunalight Black Sheep and Daigusto Emeral.
Elemental HERO Stratos	Great searcher that triggers on Normal or Special Summon. No once per turn restriction allows it to create OTKs. You lose no advantage playing this card. Easily searched by other cards, such as A Hero Lives, E - Emergency Call, Reinforcement of the Army, Summoner Monk, etc. Also, has decent attack and a potent destruction effect. Was part of the Airblade Turbo Deck, the top Deck of the September 2006 Format. This card is Semi-Limited in the OCG, due to HEROes being less competitive compared to current Meta Decks.
Evilswarm Exciton Knight	Generic Rank 4 Xyz Monster with a powerful destruction effect. Can nuke the field whenever you have less cards than your opponent, and the effect can even be chained to cards like Bottomless Trap Hole, Compulsory Evacuation Device, Torrential Tribute, etc. While it has low ATK and makes your opponent take no more damage that turn, the loss in card advantage when hit by this card's effect can be devastating, especially against Pendulum Decks. This card is Unlimited in the OCG.
Fiber Jar	Even though it's slower and harder to pull off than it once was, it resets almost everything. It even puts itself back into the Deck when flipped. If used in a Deck with cards like Soul Release, you can slowly Banish your opponent's entire Deck, while giving them a smaller Deck each time Fiber Jar is used.
Fishborg Blaster	An infinitely-reusable Tuner, although Limited only to WATER non-tuner monsters. Can cause easy OTK's when used with cards such as Superancient Deepsea King Coelacanth. Broken with Formula Synchron and T.G. Hyper Librarian (who is Limited). Fishborg Launcher was designed to replace this card. With the release of Atlanteans, this card would create even more powerful combos and loops if it were to be unbanned.
Lavalval Chain	Can easily be Xyz Summoned in Rank 4 Xyz Decks, and can also send any card from your Deck to the Graveyard or place any monster card from your Deck on top of your Deck. Mainly hit due to causing loops and OTK's due to its lack of a once per turn restriction between multiple Lavalval Chains, or possibly to pre-emptively hit the Clownblade Deck that was topping in the OCG.
Level Eater	A searchable Level 1 monster that can revive itself any number of times per turn so long as you have a Level 5 or higher monster on your field. While it was always a popular Tool in Synchro Decks, it was barely relevant until DARK Synchro Decks abused this card for combos that banish the entire opponents hand and setting up an OTK, as well as acting like near-infinite fodder. This card is Unlimited in the TCG.
Magical Scientist	Could easily create an FTK with Catapult Turtle; however, Catapult Turtle's effect has now been errata'd to once per turn. Also, can easily lead to a swarm of Xyz Monsters. Can be searched by Where Arf Thou? and some of the Prophecy/Spellbook cards.
Majespecter Unicorn - Kirin	Splashable Level 6 Pendulum monster with a good effect. Can return one card from both player's fields back to the hand during either player's turn, allowing you to reuse certain cards again on your turn or next turn, or disrupt important plays during your opponent's. Is also immune to being targeted and destroyed by the opponent's card effects, making it hard to remove outside of battle.
Makyura the Destructor	When sent to the Graveyard, it allows the activation of any Trap Card from the hand. A lot of Trap Cards have powerful effects that are balanced due to the fact of them needing a turn to be activated, this removes the downside. Sets up the loop OTK.
Mind Master	Very similar to Substitoad (who is also Forbidden), except you pay 800 LP each time (or you can use 1 more card to bypass it). Creates many OTK's/FTK's, including an attacking OTK with Reinforced Human Psychic Borg and many draw-out OTK's with Caam, Serenity of Gusto. Can be searched by Emergency Teleport and One for One.
Morphing Jar	High draw power. Messes up opponent's hand. Sets up Graveyard. However, the opponent can also abuse this. Has its own OTK/FTK Deck. Can also cause an OTK/FTK with Jackpot 7. This card is Limited in the OCG.
Morphing Jar #2	A very potent field-disruptor, freezing the battle phase and eating up Nomis, Tribute and Extra Deck monsters the moment it is flipped while resetting the field. Can create outrageous OTKs/FTKs, especially with All-Out Attacks or Jackpot 7. This card is Unlimited in the OCG.
Number 16: Shock Master	Creates an immediate lock/OTK and can ruin an entire Deck, depending on what type of card they use most. Easily Summoned first turn in most Rank 4 Xyz Decks. Can outright win games if played alongside other lockdown cards.
Performage Damage Juggler	Insanely splashable utility. Key card in Performage Decks. Can negate burn effects or stop OTKs from hand while providing crazy consistency to any Deck running Performages from Graveyard. Mainly hit due to Performage Performapal (PePe) Decks that were topping everywhere.
Performage Plushfire	Too abusable. Spawns any Performage monster from your hand or Deck whenever it's destroyed without any restriction and easily recyclable by being a Pendulum Monster. Combos well with Wavering Eyes, Performapal Pendulum Sorcerer, and Luster Pendulum, the Dracoslayer, all of which are Limited in the OCG.
Performapal Monkeyboard	Key card in Performapal Decks. Can search any Level 4 or lower Performapal Monster when it's activated as a pendulum scale, allowing you to set up both scales by itself to Pendulum Summon practically for free. Can be searched easily itself by Performapal Skullcrobat Joker, Performapal Pendulum Sorcerer, and Wavering Eyes, all of which are Limited in the OCG.
Shurit, Strategist of the Nekroz	Key card to Nekroz. Can be used to easily Ritual Summon the otherwise difficult to Summon higher Level Nekroz Ritual Monsters, and even searches any Warrior-Type Nekroz Ritual Monster on top of that. Can be searched easily with Nekroz of Brionac or Reinforcement of the Army and reused by Nekroz of Unicore or Dance Princess of the Nekroz (after banished by Nekroz of Valkyrus or one of the Nekroz Ritual Spell cards). This card is Limited in the OCG.
Substitoad	Poorly designed card, able to mill most of your Deck in one turn. No once per turn restriction. Combos well with Pot of Avarice (which is also Forbidden in the TCG). See also: Frog Burn FTK (The most consistent burn OTK/FTK Deck for the March 2010 format). Tradetoad was designed to be a fair version of it.
Tellarknight Ptolemaeus	Generic Rank 4 Xyz Monster that can be made with up to 5 Level 4 monsters, and can Summon a Rank 5 Xyz Monster from your Extra Deck by detaching 3 materials and using itself as Xyz Material (and is chainable). Mainly Forbidden for being able to Summon strong monsters that shouldn't Normally be possible for most Decks, such as Constellar Pleiades, Cyber Dragon Nova (which is then used to Summon Cyber Dragon Infinity), and Outer Entity Azzathoth. Tellarknight Vatlamyus was designed to replace this card.
The Tyrant Neptune	High-Level monster with an effect similar to Phantom of Chaos (now Unlimited; see below). Was Forbidden because of an OTK with "Lyrilusc - Independent Nightingale" (which is easily Summoned by "Instant Fusion"), where you copy that card's effect with this card, which gives it 6000 ATK (5000 with its effect + 1000 from "Nightingale" itself), makes it unaffected by any other card effects, and enables it to inflict 5000 points of damage to your opponent once per turn. Differently from most other effect-copying monsters, it is permanent, so the total immunity carries over to the opponent's turn, making "Neptune" extremely difficult to remove. Can be searched by King of the Feral Imps.
Tribe-Infecting Virus	Either a Lightning Vortex on legs or a Snipe Hunter on steroids. Now even more potent due to many archetypes being mainly one Type. No once per turn restriction gives the ability to clear the entire field when possible. Tribe-Shocking Virus was designed to replace it. Can be searched easily with Summoner Monk. With the release of Atlanteans, this card would have the potential for even more powerful combos if it were unbanned.
Victory Dragon	Was Forbidden on principle due to being able to interact with something outside the current Duel. In tournaments, an opponent could surrender or intentionally try to receive a Game Loss penalty in an attempt to lose only the Duel instead of lose the entire Match with this card's effect. Led to judge declarations involving "unsportsmanlike conduct" and major ruling hassles during the time it was playable.
Wind-Up Carrier Zenmaity	Very easy to Summon in Wind-Up Decks. Starts up and creates nasty loops such as the infamous Wind-Up Hand Loop. Takes any 2 Level 3 monsters to Summon, rather than being archetype specific. Summoning it pretty much meant you would swarm. This card is Unlimited in the OCG because Wind-Up Hunter (below) is Forbidden in the OCG.
Wind-Up Hunter	Key card of the infamous Wind-Up Hand Loop along with Wind-Up Rat and Wind-Up Carrier Zenmaity (which is Forbidden in the TCG). Can be searched by Fire Formation - Tenki and most of the Wind-Up cards. This card is Unlimited in the TCG.
Witch of the Black Forest	Much more powerful than Sangan (now Unlimited due to its errata) since it's able to search out strong key monsters such as Dark Armed Dragon, Monarchs, Fire Fists, Hieratics, Bujins, Thunder King Rai-Oh, etc. AND most of the cards Sangan can search. Can be searched easily itself with Summoner Monk and some of the Prophecy/Spellbook cards. This card is Semi-Limited in the OCG due to an erratum that prevents you from using the effects of the added monster that turn.
Yata-Garasu	One of the very first cards to be put on the banlist. Easily prevents a player who is behind on resources from ever recovering. Under very specific circumstances, it can even prevent a player from making a move for the rest of the Duel (see Yata-Garasu Lockdown). Can be searched easily by Aratama and Tour Bus To Forbidden Realms.
Zoodiac Broadbull	Generic Rank 4 Xyz Monster that can also easily be Summoned by using any other Zoodiac monster you control as material, or simply by using any 2 Level 4 monsters you control. Can search any Beast-Warrior monster that can be Normal Summoned by detaching a material, including other Zoodiac monsters (mainly Whiptail, which can then attach itself to this card to give it 1200 ATK and banish any monster it battles), but it can also search Fire Fists, Bujins, Gladiator Beasts, Koa'ki Meiru, and others; basically like Fire Formation - Tenki (Semi-Limited in the OCG). This card is Unlimited in the TCG.
Zoodiac Drident	Strong Rank 4 Xyz Monster that can easily be Summoned by using any other Zoodiac monster you control as material, including other Zoodiac Xyz Monsters such as Lyca or Broadbull (also Forbidden in the OCG), which only require any 2 Level 4 monsters to Summon. Can destroy any face-up card on the field during either player's turn, clearing the way for OTK's or allowing disruption of cards during your opponent's turn. Mainly hit due to Zoodiac Decks dominating the OCG metagame. This card is Unlimited in the TCG.
Butterfly Dagger - Elma	Creates infinite loops with Gearfried the Iron Knight, such as drawing an unlimited number of cards with Royal Magical Library(Which can either lead to you drawing the pieces of Exodia or dealing massive damage with Chaos Emperor Dragon - Envoy of the End) or gaining an Unlimited number of Life Points with Spell Absorption (which can then lead to an Unlimited burn loop with Fire Princess), etc. Also insanely abusable in Inzektors.
Card of Safe Return	Many Decks rely on Graveyard manipulation (such as Zombies, Wind-Up, Fabled, Dark World, Infernoid, etc.); this card can easily generate extremely high draw power when used with them without any restriction.
Card Destruction	Sets up your Hand and possibly Graveyard. Can mess up, or help with, the opponent's Hand, but can also set up their Graveyard. Works very well with Dark World and Fabled. Like Morphing Jar (which is also Forbidden in the TCG), can be more devastating to your opponent and more beneficial to you. This card is Limited in the OCG.
Change of Heart	Better than Brain Control and Mind Control, both of which are Limited. Gain an opponent's monster for free for a turn, and you can do whatever you want with it.
Chicken Game	Generic draw Spell card that can be searched by Terraforming (Semi-Limited in the OCG) and reused by Pseudo Space, enabling severe Deck thinning for virtually any Deck. Mainly Forbidden due to abuse in various FTK Decks (including one with Monarchs) that used this card and Upstart Goblin (below) to separate your life points from your opponent's enough to FTK using Life Equalizer (Forbidden in the OCG), Blasting the Ruins, or Magical Explosion (Limited). This card is Unlimited in the OCG.
Cold Wave	Temporarily disables ALL Spell and Trap usage for a fairly long time, which allows preparations for an OTK and can leave the opponent vulnerable and unable to defend themselves es once you use an effect that destroys their back row. Incredibly hard to fight against if the opponent is using a Deck that focuses on monster effects rather than Spells or Traps.
Confiscation	Devastating 1 for 1 card with a low cost. Allows a player to see an opponent's entire hand (letting them know what Deck they may be playing and what strategies they may use next) and freely get rid of their presumably best or most useful card.
Delinquent Duo	Very powerful 2 for 1 card with a low cost. Discards 2 cards from your opponent's hand, and they have no control over one of the cards they lose. Especially devastating when the opponent has only a few cards in their hand.
Dimension Fusion	Too many good combos. Was abused with Dark Armed Dragon to clear the opponent's field and swarm your own, forming an OTK. With more and more Decks relying on Banished monsters, this can't come back. Like Cyber-Stein (above), the outcome is worth the high cost.
Gateway of the Six	Can gain counters whenever a Six Samurai monster is Normal or Special Summoned. With the introduction of Legendary Six Samurai monsters that can Special Summon themselves es, and the ability for Gateway to remove Bushido Counters from anywhere on your side of the field, 2 or more of these would result in constant searching of Six Samurai monsters for every Summon. Creates ridiculous swarming, loops, lockdowns, and even FTKs if you control other cards that gain Bushido counters on the field. This card is Unlimited in the OCG.
Giant Trunade	Clears back field and prepares for OTK. Harder to stop than Heavy Storm (Which is also Forbidden) because it doesn't destroy. Mainly banned for it being able to recycle and reuse Spell/Trap Cards with effects that can only be used a limited amount of times while they are on the field. It's notable that effects that consistently bounce your own Spell/Traps are very rare due to this.
Graceful Charity	Too fast. You draw before you discard. Sets up Graveyard. Although it seems like an even trade, it can be better than Pot of Greed in more Graveyard-reliant Decks.
Harpie's Feather Duster	Too powerful. Clears out the opponent's back row while yours is safe. Can be searched by Hysteric Sign. This card is Limited in the OCG.
Heavy Storm	This on first turn is usually catastrophic for the opponent, and not everyone manages to set Starlight Road or THRIO on their first turn. Can even benefit you by clearing up useless space or destroying your own Pendulum Scales so you can trigger their effects, activate more, then Pendulum Summon them back for OTK's.
Kaiser Colosseum	Powerful and splashable floodgate that prevents your opponent from Summoning more monsters than you control. Unlike other common floodgate cards, this only directly affects the opponent and does not have to be set before activation. Can stop the opponent from being able to play at all if you control only 1 very powerful boss monster or monsters like Neo-Spacian Grand Mole (Limited in the TCG) or Majespecter Unicorn - Kirin (also Forbidden; see above). This card is Unlimited in the OCG.
Last Will	Universal searcher. Mainly was Forbidden for making the extremely fast Turtle FTK; however, Catapult Turtle's errata now makes its effect Limited to once per turn. Can still cause FTK's by Summoning Cannon Soldier from your Deck, and works extremely well with Synchros, Monarchs and Decks that spam quickly. After activation, its effect can be used any time that turn, even during the Battle Phase.
Mass Driver	Abused in many Decks to form a FTK, since it does not use up the Normal Summon and can be used multiple times a turn. Finishing move.
Metamorphosis	Was a key part of the Goat Control Deck and has too many good combos. Notable ones include Beast King Barbaros → Cyber Twin Dragon or Blaze Fenix, the Burning Bombardment Bird and Metal Reflect Slime/Tragoedia/REDMD → Cyber End Dragon, Destiny End Dragoon, Gaia Drake, the Universal Force or Naturia Exterio. With the introduction of more Level-manipulation cards and easier Summoning, this card is much less likely to come back.
Mirage of Nightmare	Too fast. If it gets destroyed, you don't need to discard, so it can be as good as, if not better than, Pot of Greed. Also combos with Emergency Provisions, Solomon's Lawbook, Gravelstorm, and MST extremely well. Devastating in Dark World and Fabled Decks.
Monster Reborn	One of the most powerful Spell Cards in the game. Almost/just as easy to use as Pot of Greed(See below). Can be a very powerful topdeck with very little setup. Can even Special Summon from the opponent's Graveyard, further punishing them if you manage to destroy a strong monster they control. This card is Limited in the OCG.
Painful Choice	Gets a good card or sends cards that work well in the Graveyard; similar to activating 4 Foolish Burials at once. Instant Graveyard setup for Decks like Plants, Infernity, Dragon Rulers, Zombies, and Chaos Dragons to name a few. With more and more cards that gain advantage when sent to the Graveyard, this card becomes even more powerful.
Pot of Avarice	Recycles the Graveyard while adding draw power. Excellent in certain Decks, recycling cards like Reborn Tengu, Gadgets, Wind-Ups, etc. Can also put Extra Deck monsters back, leaving you with no Graveyard set-up disadvantage and letting you reuse Limited Extra Deck monsters. Plants abused this card, but the March 2012 lists killed Plant Synchro. Pot of Dichotomy was designed to be a fair version of this card. This card is Limited in the OCG.
Pot of Greed	Instantly gives +1 in card advantage to the user for absolutely no cost. Too easy to use (literally every Deck in the game would be improved by adding this card to it). Forcing all competent Decks to run this card to avoid being at a disadvantage would be unfair.
Premature Burial	Fast revival. Formerly looped with Brionac, Dragon of the Ice Barrier (though Brionac has now been errata'd so it can't bounce your own cards) and Giant Trunade, which is also Forbidden. There are also combos that allow 1 Special Summon per turn through cards like Dewloren, Tiger King of the Ice Barrier, Falcon of Mist Valley, etc. Searchable and reusable via Hidden Armory.
Raigeki	Too Powerful. Much stronger than Dark Hole, which is Limited (Semi-Limited in the TCG). Destroys only the opponent's monsters. This card is Limited in the TCG.
Snatch Steal	Gives near permanent control. Opponent's LP gain can be avoided entirely by stealing a strong monster and consistently attacking with it, or by Tributing, Synchro Summoning, or Xyz Summoning with the target. Searchable and reusable via Hidden Armory. Almost as, if not more powerful than, Change of Heart (see above).
Spellbook of Judgment	One of the most broken Spell Cards ever made. An incredible searcher for Prophecy Decks, adds several Spellbook Spell cards from your Deck to your hand during the End Phase of the turn that it's activated, like Secrets, Master, Power, Fate, Wisdom, Life, Eternity, Star Hall, and Tower for every Spell card played. Last effect Summons great Spellcasters depending on the number searched such as Jowgen the Spiritualist (seals Special Summons), Kycoo the Ghost Destroyer (prevents Banishing), Maiden with Eyes of Blue (stuns opponent), Justice of Prophecy (who then searches another Spellbook and High Priestess of Prophecy), Dark Magician of Chaos (who can then retrieve any Spell), and even World of Prophecy (can act like a nuke). Can be searched easily itself with Secrets, Master (Copying Spellbook of Secrets), Spellbook Magician of Prophecy, Spellbook Library of the Crescent, and Justice of Prophecy. Can be reused with Tower, Magician of Faith (in the TCG), DMoC, Eternity (after banished with Spellbook of Fate or High Priestess of Prophecy), or Master (copying Spellbook of Eternity).
Super Polymerization	Powerful, chainable Quick-Play Spell Card that cannot be chained to. Can fuse monsters from either player's side of the field to make Fusion Summons. Mainly abused in HEROes (to Fusion Summon Absolute Zero, Nova Master, Gaia, Great Tornado, The Shining, and Escuridao), Zombies (for Dragonecro Nethersoul Dragon while Zombie World is on the field), and Shaddolls (For El Shaddolls Construct (Forbidden), Winda, Grysta, Shekhinaga, Wendigo, and Anomalilith). Can also be used to fuse any two Synchro or Xyz Monsters from either side of the field to make Elder Entity Norden (Forbidden). This card is Limited in the OCG.
Super Rejuvenation	Amazing draw card. Makes strong discard-and-draw cards even stronger. Offsets the costs of certain card effects. Can draw out most of your Deck in one turn if used right since it can be used multiple times per turn. Abusable in Exodia, Hieratic, and Dragon Ruler Decks. This card is Unlimited in the OCG.
The Forceful Sentry	A Confiscation (above) with no cost. Returns the card to the Deck rather than discarding it to the Graveyard. Having a card in the Graveyard is usually considered to be better that having it in the Deck.
Wavering Eyes	A powerful, chainable card for and against Pendulum Decks. This card's first effect allows easy burn damage, the second effect is versatile and easy to trigger, while the third effect provides easy, generic removal. It is especially powerful in Pendulum mirror matches, where the player with Wavering Eyes can devastate their opponent's set up while furthering their own plays, or even chain their Wavering Eyes to their opponent's Wavering Eyes, effectively rendering theirs useless. This card is Semi-Limited in the OCG.
Zoodiac Barrage	Can Special Summon any Zoodiac monster from your Deck by destroying any face-up card you control, even itself or Fire Formation - Tenki or Tensu after they've been used, and can also attach itself to a Zoodiac Xyz Monster if it's destroyed, even by its own effect. Banned due to Zoodiacs creating Tier 0 formats and being an easy Material in general that works well with any card that triggers on being destroyed. This card is Unlimited in the TCG.
Last Turn	Turns around the game with little to no effort. Overwhelmingly flexible with various Decks and monsters. An instant win is guaranteed when you control a monster that prevents your opponent from Special Summoning OR can create an instant Draw. Easy to get down to 1000 or less LP with cards like Wall of Revealing Light, Inspection, and Backs to the Wall.
Life Equalizer	This card forms OTKs with cards such as Magical Explosion and Blasting the Ruins, and its steep requirement can easily be met with cards such as Chicken Game (Forbidden in the TCG), Upstart Goblin, and Wall of Revealing Light and by drawing out your Deck with Royal Magical Library. This card is Unlimited in the TCG.
Return from the Different Dimension	Similar to Dimension Fusion (above). Creates very easy OTKs, especially in Dragon Ruler Decks. Easy to prevent the monsters from being banished again since you can just Synchro/Xyz/Link Summon with them.
Royal Oppression	One card to continuously stop a large number of cards and cripple a large number of Decks with a fairly low cost. Some Decks abuse the fact that it cannot be used in the Damage Step. Can stop a larger variety of cards than Solemn Warning, which has a larger cost and can only be used once. Used in swarm Decks, where you would swarm with a lot of big monsters, and then flip this over.
Self-Destruct Button	Mainly Forbidden for causing too many draws in Tournaments and messing up Ranked Games. This card is Unlimited in the OCG.
Sixth Sense	Potentially one of the strongest forms of draw power, being able to draw up to 6 cards from one effect. The drawback is also potentially beneficial, especially with more Graveyard-reliant Decks. The drawing aspect can be rigged with That Six.
Solemn Judgment	Can negate almost anything, having a cost you can always pay.
Time Seal	Forces the opponent to skip a Draw Phase, which is lethal when they are topdecking. Unlike Drastic Drop Off, this card can be chained anytime, making it much better; also with Mask of Darkness and Tsukuyomi at 3, lockdown Decks could take unfair advantage.
Trap Dustshoot	Devastating to the opponent if played on them during their first turn. Broken when combined with other Traps like Mind Crush. If used early on, it creates a situation where your opponent will have a lot of trouble recovering. Many thought that the opponent having to have at least 4 cards in their hand was too fair a restriction to ban it. But, it is horrible to go against Turn 1.
Ultimate Offering	A cheap way to swarm the field, resulting in easy Xyz Summons. Gadgets can spawn Rank 4's like mad (as well as Rank 5 with Gear Gigant X and Jumbo Drill around). The effect used to be that both players could use the effect, but it was errata'd so only the controller of the card can use it, which gives a huge advantage. Also abusable in various other Decks such as Madolche, Blackwing (when comboed with Black Whirlwind), and Empty Jar.
Vanity's Emptiness	One card that can continuously stop a large number of cards and cripple a large number of Decks with no cost. While it's easily destroyed when another card is sent from your Deck or field to your Graveyard, this can sometimes work in the user's favor when something deliberately sends a card to your Graveyard (e.g. activating Mystical Space Typhoon on an opponent's card) so you can keep Special Summoning on your turn. This card is Limited in the OCG.
Limited
Artifact Moralltach	Can destroy any face-up card your opponent controls without targeting when it's Summoned. Can be searched with Artifact Sanctum and Artifact Ignition. Can be reused with Artifact Failnaught or Call of the Haunted. This card is Unlimited in the OCG.
Beatrice, Lady of the Eternal	Very good Rank 6 Xyz Monster with a fantastic effect. Can easily be Xyz Summoned in Burning Abyss Decks by using Dante, Traveler of the Burning Abyss (Limited in the OCG) as Xyz material, and can send any card from your Deck to the Graveyard during either player's turn, allowing you to search out Limited cards like Graff or Cir, or interrupt your opponent's plays by sending Farfa, Alich, or Mischief of the Gnomes from your Deck to the Graveyard. Can also replace itself with Dante, Pilgrim of the Burning Abyss when it dies. This card is Unlimited in the OCG.
Black Luster Soldier - Envoy of the Beginning	Can be Special Summoned easily, good effects, high ATK. Honest can be used on its first attack, then the 2nd attack would be deadly. Basically a better Chaos Sorcerer (below) See also: Chaos. This card is Unlimited in the OCG.
Blackwing - Gofu the Vague Shadow	Level 5 tuner with a Cyber Dragon-like effect. Special Summons two tokens when it's Summoned by its own condition, allowing you to revive a Blackwing Synchro Monster from your Graveyard. The tokens can be used as materials for Metalfoes Fusion Monsters, or Link Summons, while this card allows for easy plays into Ultimaya Tzolkin, which allows easy Summons of high-Level Dragon Synchro Monsters such as Beelze of the Diabolic Dragons or Crystal Wing Synchro Dragon. This card is Unlimited in the TCG.
Blaze Fenix, the Burning Bombardment Bird	Very powerful Fusion Monster with a deadly burn effect. Creates easy OTK's/FTK's when used in conjuncture with cards like Ancient Fairy Dragon, Black Garden, and Fusion Gate, or with Elemental HERO Electrum, Fusion Gate and Chain Material. This card is Unlimited in the TCG.
Brionac, Dragon of the Ice Barrier	Was formerly Forbidden due to a lack of a once per turn restriction, allowing you to bounce cards with its effect multiple times per turn and reuse your own cards for loops and OTK's. Now, it has been errata'd so it can only be used once per turn, and can only bounce your opponent's cards, not your own. This card is Unlimited in the OCG.
Cir, Malebranche of the Burning Abyss	Key card in Burning Abyss. Can Special Summon any Burning Abyss monster from your Graveyard whenever it's sent to the Graveyard, allowing easy recovery, or to Summon another Dante, Traveler of the Burning Abyss, Virgil, Rock Star of the Burning Abyss, or get setup for Fire Lake of the Burning Abyss again mid to late-game. Can be searched by Tour Guide from the Underworld and Graff, Malebranche of the Burning Abyss (both Limited in the TCG). This card is Unlimited in the OCG.
Dandylion	Compulsory effect. Gives lots of advantage most of the time. Re-usable in many Decks, creates Tokens that can be used for Synchro, Tribute, or Link Summons. Effect also triggers when it enters the Graveyard through any means. This card is Semi-Limited in the OCG.
Dante, Traveler of the Burning Abyss	A generic Rank 3 Xyz Monster that can easily fill the Graveyard with monsters, such as Burning Abyss and Phantom Knight monsters for easy advantage. Can replace or even recycle another copy of itself once it is sent to the Graveyard through any means, and can also be used to easily Xyz Summon Beatrice, Lady of the Eternal (Limited in the TCG). It also forms a small loop with Cir, Malebranche of the Burning Abyss (Limited in the TCG). This card is Unlimited in the TCG.
Dark Armed Dragon	Can be Special Summoned easily in most DARK Decks. Specific destructive power. High ATK. See DAD Return and Tele-DAD.
Deep Sea Diva	Good searcher. Creates automatic Level 5-8 Synchros or Rank 2 Xyz when used in conjunction with Abyss-sphere and Atlantean Marksman or Atlantean Heavy Infantry upon Normal Summon.
Dewloren, Tiger King of the Ice Barrier	Creates loops and OTKs when used with cards like Grandsoil the Elemental Lord, Symbols of Duty, or Symbol of Heritage (at 3). Can also reuse cards like Call of the Haunted, Fiendish Chain, Abyss-sphere, etc.
Ehther the Heavenly Monarch	Key monster in Monarch Decks. Can Special Summon another Monarch from your Deck when it's tribute Summoned, while also setting up your Graveyard with cards such as Pantheism of the Monarchs or The Prime Monarch. It can even tribute Summon itself during the opponent's turn to disrupt their plays with The Monarchs Stormforth and Kuraz the Light Monarch. This card is Unlimited in the OCG.
Elemental HERO Shadow Mist	Good Level 4 monster in HERO Decks that can search any Quick-Play "Change" Spell Card (mainly Mask Change or Mask Change II) when it's Special Summoned and can also search a HERO monster when it's sent to the Graveyard. Was Limited in OCG due to the unexpected splashability in most Decks. This card is Unlimited in the TCG.
Evigishki Gustkraken	Awesome Hand control card. There is a loop where this card is used within a Gishki-Hieratic hybrid Deck and can be bounced repeatedly with Constellar Ptolemy M7 to shut down the opponent's hand. It didn't help that Hieratics Summon Level 6 monsters with the greatest of ease. This card is Semi-Limited in the OCG.
Evigishki Mind Augus	Can greatly hinder opponent's Graveyard while recycling yours, letting you reuse your Gishki monsters/Spell cards. Key card of the Gishki FTK. This card is Unlimited in the OCG.
Exodia the Forbidden One	Instant win card. You don't need to be lucky to get it. With more and more Stall and Draw cards being released, these will stay Limited. Although unlikely, if 1 of the pieces becomes Forbidden, then the other 4 can be Unlimited.
Left Arm of the Forbidden One
Left Leg of the Forbidden One
Right Arm of the Forbidden One
Right Leg of the Forbidden One
Fairy Tail - Snow	Sets an opponent's monster when it's Normal or Special Summoned, and can be Special Summoned during either player's turn by banishing 7 other cards from your Graveyard, field, or hand, which is abusable in Infernoid or Lightsworn Decks since they can easily get lots of cards into the Graveyard. Can even be used multiple times per turn. This card is Unlimited in the TCG.
Genex Ally Birdman	A universal tuner that can be Special Summoned easily. Creates loops and even OTKs generating lots of monsters in Karakuris, Agents, Hieratics, and other Decks if used right. Combos very well with Divine Wind of Mist Valley (which is also Limited). Also part of the Gallis OTK and Divine Wind FTK.
Graff, Malebranche of the Burning Abyss	Can Special Summon any Burning Abyss monster from your Deck whenever it's sent to the Graveyard, allowing you to Xyz Summon another Dante, Traveler of the Burning Abyss, Synchro Summon Virgil, Rock Star of the Burning Abyss, or setup for Fire Lake of the Burning Abyss. Can be searched by Tour Guide from the Underworld (also Limited in the TCG; see below) and reused by Cir, Malebranche of the Burning Abyss (also Limited in the TCG) or Dante. This card is Unlimited in the OCG.
Ignister Prominence, the Blasting Dracoslayer	This card can eliminate an opposing card for free thanks to its second effect while getting around cards that are immune to targeting and/or destruction. Its second effect also fuels the Summon of Dinoster Power, the Mighty Dracoslayer and Majester Paladin, the Ascending Dracoslayer, which can lead to more branching plays. This card is Unlimited in the OCG.
Infernity Archfiend	The key to Infernity Decks. Can be Special Summoned easily by its own effect or through cards such as Stygian Street Patrol or Summoner Monk. Searches any Infernity card from your Deck when Special Summoned. No once per turn restriction allows it to create OTK's and net multiple searches. This card is Unlimited in the OCG.
Inzektor Dragonfly	This one card can swarm the field AND cause nasty loops in one turn with Inzektor Hornet, Inzektor Ladybug, Inzektor Hopper, or Inzektor Earwig. Second effect can be used multiple times in one turn to create OTKs. Can be searched easily with Sangan (now erattad), Howling Insect, Insect Imitation or Transmodify, (when used on Inzektor Ladybug), Inzektor Centipede, and Mystic Tomato. Can be reused with Inzektor Giga-Mantis or Inzektor Sword - Zektkaliber. This card is Unlimited in the OCG.
Inzektor Hornet	A solid one-for-one destruction card with perks. The key to Inzektors. Easy to dump into the Graveyard with Foolish Burial, Armageddon Knight, or Dark Grepher. You only need one to loop with anyway. This card is Unlimited in the OCG.
Kozmo Dark Destroyer	The boss monster of Kozmo Decks. Can destroy any monster on the field when it's Normal or Special Summoned, and can be quite hard to remove due to its high ATK and invulnerability to targeting effects. It also Special Summons another Kozmo monster from the Deck when it dies, and can even destroy itself to trigger this. Can be searched by Kozmo Farmgirl or Kozmo Tincan and reused by Kozmotown or Kozmo Strawman. This card is Unlimited in the OCG.
Luster Pendulum, the Dracoslayer	Key card in the Dracoslayer engine. Can destroy any other Pendulum Scale you have and search another copy of that Scale, providing you with more resources. Can trigger the effects of cards such as Performage Plushfire (Forbidden) or Guiding Ariadne. Can be searched easily itself with Draco Face-Off, Ignister Prominence, the Blasting Dracoslayer, or Majester Paladin, the Ascending Dracoslayer.
Master Peace, the True Dracoslaying King	Powerful monster that can easily be Tribute Summoned by Tributing Continuous Spell/Trap cards as well as monsters, and is unaffected by effects of cards that have the same card type as the cards Tributed for its Summon. Can destroy any other card on the field during either player's turn by banishing a Continuous Spell/Trap from your Graveyard, disrupting plays during your opponent's turn and clearing the way for OTK's. This card is Unlimited in the TCG.
Mathematician	Splashable Level 3 monster with a good effect. Can send any Level 4 or lower monster from your Deck to the Graveyard, and lets you draw a card when it dies in battle. Combos well with Shaddoll monsters or with Felis, Lightsworn Archer to easily Synchro Summon Black Rose Dragon or Arcanite Magician. This card is Unlimited in the OCG.
Maxx "C"	Very effective hand Trap at countering Decks that Special Summon constantly, allowing you to draw 1 card every time your opponent Special Summons. Can also be searched by Retaliating "C", another hand Trap. This card is Unlimited in the OCG.
Necroface	Macro Decks of any sort LOVE this card. Has the potential of being a powerful beater and resets and/or sets up Banished cards. Abusable with Gold Sarcophagus, Allure of Darkness, and Pot of Desires. Combined with Soul Absorption is a free 5500 Life Points gained when banished. Having multiple copies can loop them, chain their own effects when banished from the Deck, or make OTKs (Necro mill OTK). Combos EXTREMELY well with Inferno Tempest, Shiranuis, and PSY-Framelord Omega (below). This card is Semi-Limited in the TCG.
Nekroz of Brionac	Key card in Nekroz. Simply by discarding itself, it can search effectively ANY Nekroz card (including Spells, thanks to Nekroz of Clausolas). Can also be Summoned to return up to 2 monsters Special Summoned from the Extra Deck back to the Deck, easily clearing the field.
Nekroz of Unicore	Key card in Nekroz. Can negate the effects of any monster Special Summoned from the Extra Deck, and can recycle any Nekroz card from the Graveyard. Combos extremely well with Nekroz Kaleidomirror to send Herald of the Arc Light from your Extra Deck to the Graveyard to search out any Ritual Monster or Ritual Spell card from your Deck.
Neo-Spacian Grand Mole	Can create locks, especially with Kaiser Colosseum (Forbidden in the TCG). Easily takes out boss monsters, particularly those with specialized Summoning requirements, and does not destroy. However, it needs to attack to use its effect. This card is Unlimited in the OCG.
Night Assailant	Must be at 1 otherwise this card will just recycle the other one when discarded and an infinite loop will be created making +0 discards, which would lead to cards like Snipe Hunter wiping out your whole field or Dark Crusader having Unlimited attack points, etc.
Performapal Skullcrobat Joker	This card is a themed Elemental HERO Stratos (Forbidden in the TCG and Semi-Limited in the OCG). It can single-handedly set up a Pendulum Summon by searching Performapal Monkeyboard (Forbidden), and can search Performapal Pendulum Sorcerer to further thin the Deck and set up plays. This card is Unlimited in the TCG.
PSY-Framelord Omega	Amazing Level 8 Synchro Monster that can banish itself and a card in the opponent's hand during either player's Main Phase, return a banished card to the Graveyard during the opponent's Standby Phase, and can even recycle itself and one other card in either player's Graveyard during your Main Phase. Mainly hit due to a hand loop in the OCG involving Synchro Summoning 3 copies of this card in one turn to banish 3 cards in your opponent's hand. Abusable in other Decks like Zombies, Infernoids, and ABCs. This card is Unlimited in the TCG.
Qliphort Scout	Adds any "Qli" card from your Deck to your hand once per turn, by paying 800 LP. Since that's just its Pendulum Effect, it's also treated as a Normal Monster so it can be searched easily itself via Summoner's Art or Saqlifice (Limited). This card is Unlimited in the OCG.
Red-Eyes Darkness Metal Dragon	Absurdly easy to Summon, with high ATK, and costless +1. Splashable in any Dragon Deck. Particularly problematic when used with Inferno Reckless Summon in Hieratics (which will Summon it with 0 ATK and make it IRS-legit.) Needed to be hit because most Dragon Decks were topping. Can be searched easily with Eclipse Wyvern. With the TCG release of Superdreadnought Rail Cannon Gustav Max, which is easily Summoned with two REDMD, it may stay Limited.
Rescue Cat	Instant +1. Abusable by Gladiator Beasts, Naturias, Wind-Ups, Flamvells, Fableds, Madolches, Raccoons, and especially X-Sabers. Formerly Forbidden due to not having a once per turn restriction for its effect and not negating the effects of the Summoned monsters, allowing for easy OTK's with cards such as Uniflora, Mystical Beast of the Forest. Now, it can only be used once per turn and it negates the effects of the Summoned monsters. Can easily be searched with Summoner Monk. This card is Semi-Limited in the OCG.
Rescue Rabbit	Super splashable in many Decks. Fire Fists, Evilswarms, Gem-Knights, Gladiator Beasts, and more all can use this for instant Rank 4 Xyz or Fusion Summons. Key card of Dino Rabbit Decks. This card is Unlimited in the OCG.
Ritual Beast Ulti-Cannahawk	Key Fusion Monster in Ritual Beast Decks. Can search any Ritual Beast card. Generates huge card advantage by repeatedly fusing and de-fusing to use its effect multiple times. At 1, it's much easier to permanently eliminate this card. Additionally, it effectively prevents Spiritual Beast Rampengu from searching out Spiritual Beast Cannahawk, another key searcher. This card is Unlimited in the OCG.
Speedroid Terrortop	Can Special Summon itself when you have no monsters, then search Speedroid Taketomborg, which also Special Summons itself, letting you make a Rank 3 Xyz Monster with one card without using your Normal Summon. Common choices include M-X-Saber Invoker and Dante, Traveler of the Burning Abyss to kick-start combos, and Totem Bird for disruption. Can also search other Speedroid monsters, such as Red-Eyed Dice, which can be used for Synchro plays.
Summoner Monk	Great searcher. Was originally hit because it could grab Rescue Cat, who is now also Limited due to its errata. Combos well with Sacred Crane, as well as Shaddolls, Tellarknights, Star Seraphs and Elemental HERO's Shadow Mist or Stratos. Easy Rank 4 Xyz Monster/Level 8 Synchro Monster. This card is Semi-Limited in the TCG.
T.G. Hyper Librarian	Super splashable, low Level with decent ATK, good effect that works when either player Synchro Summons. Broken when comboed with Formula Synchron.
Toadally Awesome	Strong Rank 2 Xyz Monster with many good effects. Can Special Summon a Frog monster from your Deck by detaching a material during either player's Standby Phase, can negate any opponent's card by sending an Aqua monster from your hand or field to the Graveyard AND set that negated card to your field, and can recycle any WATER monster from your Graveyard (even itself) when it's sent to the Graveyard. Mainly hit due to Paleozoic Decks that were topping frequently due to this card in the OCG. Can also be splashed in some Rank 4 Decks that can Xyz Summon Bahamut Shark. This card is Unlimited in the TCG.
Tour Guide From the Underworld	Good Searcher. Quickly Summons Rank 3 Xyz Monsters by Summoning another copy of itself or another Level 3 fiend-type monster. Good monsters it was used to quickly Summon include Leviair the Sea Dragon, Number 17: Leviathan Dragon, Wind-Up Zenmaines, and Number 30: Acid Golem of Destruction. It saw little use after Sangan, this card's main target, got Forbidden, so it came off the list, but was put back on the list later due to abuse in the Burning Abyss archetype in the TCG, where it can Summon almost any Burning Abyss monster from your Deck to easily make Dante, Traveler of the Burning Abyss.
Trishula, Dragon of the Ice Barrier	Probably the best Synchro around. Easy to drop in most Synchro-based Decks. Banishes a card from 3 different places without targeting. Agents could also drop it easily. The loop in Infernities to drop it infinite times may have been a contributing factor as well.
Zoodiac Ratpier	Instant +1. When attached to a "Zoodiac" Xyz Monster, that monster can Special Summon another copy of this card by detaching a material. As it is not once per turn, it can be re-used by Summoning another Zoodiac Xyz Monster on top of the old one, re-attached with "Zoodiac Tigermortar" and recycled with "Zoodiac Combo". When two others are Summoned by its effect, it allows for easy Rank 4 Xyz Summons, such as "Brotherhood of the Fire Fist - Tiger King", "Daigusto Emeral" or "Bujintei Kagutsuchi", while the original usually ends up as "Zoodiac Drident" (Forbidden in the OCG). Can be searched by "M-X-Saber Invoker", "Zoodiac Broadbull" (also Forbidden in the OCG), "Fire Formation - Tenki" or "Zoodiac Barrage" (also Forbidden in the OCG). This card is Semi-Limited in the TCG.
Book of Moon	One of the best Anti-Meta cards in the game. Stops just about everything and is one true Swiss Army Knife card. With Ignition Effect Priority being revoked, Book of Moon can easily render these monsters harmless and vulnerable by immediately responding to their Summons. It can also benefit you by flipping your monsters back face-down (See Empty Jar). This card is Unlimited in the OCG.
Burial from a Different Dimension	Can reuse monsters like Mezuki, Plaguespreader Zombie, Necro Gardna, Blackwing - Vayu the Emblem of Honor, etc. This card is Semi-Limited in the OCG.
Brain Control	Was formerly Forbidden due to being able to take control of any face-up monster your opponent controls for the small price of 800 LP. Now, it can only affect monsters that can be Normal Summoned/Set. This card is Unlimited in the OCG.
Dimensional Fissure	Good counter to Graveyard-reliant Decks like Dark World. Similar to Macro Cosmos, which is also Limited. Some Decks abuse the mechanics of this card. This card is Unlimited in the OCG.
Divine Wind of Mist Valley	Special Summons any Level 4 or lower WIND monster from your Deck if a WIND monster returns to the hand. Creates loops at more than 1 when comboed with Ancient Fairy Dragon. Works well with Genex Ally Birdman (who is also Limited) and Harpie Dancer. Can be searched easily with Terraforming. Key card of the Divine Wind FTK.
Draco Face-Off	A versatile card that easily sets up a Dracoslayer Pendulum Scale OR Special Summon a Level 4 Dracoslayer monster for further plays while setting up Pendulum Summons. It can easily tutor Luster Pendulum, the Dracoslayer, which further aids Pendulum Summons while triggering the effects of monsters such as Guiding Ariadne. Since it is a Quick-Play Spell, it can also steal wins during the Battle Phase.
Dragonic Diagram	A strong Field Spell Card that can search any "True Draco" or "True King" card from your Deck to your hand by destroying any other card you control or in your hand, and can also give all True Draco and True King monsters 300 ATK and DEF while protecting those that are Tribute Summoned from being destroyed by battle once per turn. The destruction effect is not a cost, and can thus trigger the effects of the True Kings and Dinosaurs. Can be searched by Terraforming (Semi-Limited in the OCG) and Metaverse. This card is Unlimited in the TCG.
El Shaddoll Fusion	Key Fusion Spell in Shaddoll Decks. As Quick-Play Spell you can activate it any time you want, including the Battle Phase to make easy OTKs. This card is Unlimited in the OCG.
Emergency Teleport	A versatile search card that Summons Level 1 through 3 Tuner monsters for easy Synchro Summons, Summons low-Level Kozmo monsters such as Kozmo Farmgirl and Kozmo Tincan (which can then banish themselves es to Summon stronger Kozmos from your hand like Dark Destroyer, which is also Limited), and Summons Super Quantum Blue Layer for pure and hybrid Super Quant Monarch Decks, which were topping in the OCG.
Final Countdown	Powerful alternate win-condition Spell card. Instantly wins the Duel in 20 turns (or 10 of your turns) if you can stall your opponent long enough with cards like Waboku, Threatening Roar, Battle Fader, Swift Scarecrow, Frozen Soul, Thunder of Ruler or One Day of Peace (which is also Limited). Gold Sarcophagus can get this card to your hand easier. This card is Unlimited in the OCG.
Foolish Burial	Many Decks rely on the Graveyard a lot. Works well with cards like Wulf, Lightsworn Beast, Plaguespreader Zombie, etc.
Future Fusion	Allows for massive Graveyard setup, particularly using Machines, Dragons, Worms, Zombies, and Infernoids, where Chimeratech Overdragon, Five-Headed Dragon, Worm Zero, Dragonecro Nethersoul Dragon and Infernoid Tierra respectively can allow for a large number of monsters of the player's choice to be dumped. HEROs and Fluffals abuse this with Miracle Fusion and Frightfur Fusion respectively. However, this card now has an erratum so that it must send the Fusion Materials during the Standby Phase after it is activated, making it slower and easier to remove.
Infernity Launcher	Easily searched by Infernity Archfiend, which is also Limited in the TCG. Creates loops at more than 1. First effect allows you to empty your hand to prepare for its second effect.
Interrupted Kaiju Slumber	Similar to Dark Hole (Semi-Limited), but can also Special Summon as many Kaiju monsters as possible to either player's field, allowing for multiple different combos and OTK's. Prior to the errata of the latter, it allowed for an easy 3300 damage by Special Summoning Super Anti-Kaiju War Machine Mecha Dogaran to the opponent's field. Can also search any Kaiju on a later turn for spot removal, and be searched by The Kaiju Files. This card is Semi-Limited in the TCG.
Limiter Removal	Creates easy OTKs in Machine Decks. Most of the time your monsters won't be destroyed during the End Phase because you can just Synchro/Xyz/Link Summon with them.
Mask Change II	This card allows the player to Summon powerful Masked HERO Fusions such as Masked HERO Dark Law or Masked HERO Acid using non-HERO monsters, and its drawback is easily circumvented by using Burning Abyss monsters. This card is Unlimited in the TCG.
Mind Control	Unlike Change of Heart, you can't attack with or Tribute the monster, but you can still use its effects and it still can be removed via a Synchro/Xyz/Link Summon. This card is Unlimited in the OCG.
Monster Gate	Used a lot by Turbo and OTK Decks. Abusable in Hieratics and Infernoids. This card is Semi-Limited in the OCG.
Nekroz Cycle	Key Ritual Spell in Nekroz Decks. In addition to being able to Ritual Summon any Nekroz Ritual Monster from your Graveyard (allowing easy use of both of their effects) as well as your hand, it can also banish itself and 1 Nekroz monster from your Graveyard to add 1 more Nekroz Spell Card from your Deck to your hand if you control no monsters. This card is Unlimited in the TCG.
One Day of Peace	Easily the best stall card in the game. The +1 for your opponent is offset compared to the results. No advantage lost when played. Can be used after you attack to take no damage for a turn. Sets up for big plays and OTKs. Works very well in Exodia/Final Countdown Decks. There is also an OTK/FTK loop with this card in Gishki Decks, where multiple copies of this and other draw cards were repeatedly recycled with Evigishki Mind Augus to Deck out the opponent in a single turn. Can be recycled and reused by Magician of Faith (which is Unlimited in the TCG).
One for One	Nice searcher. Formerly abused in Frog Burn FTK, Mind Master OTK, and Plant Synchro. This card will probably remain Limited due to Neptabyss, the Atlantean Prince and various Synchro combos hinging on Level 1 monsters such as Level Eater, Jet Synchron and D/D Lamia and D/D Savant Kepler.
Pantheism of the Monarchs	A superior Destiny Draw for Monarchs that thins the Deck while searching out key cards and dumping cards such as The Prime Monarch. The player can also banish this card from the Graveyard afterwards to search another Monarch Spell/Trap card, even another copy of itself. Can also be searched with Tenacity of the Monarchs. This card also plays a key role in Monarch Magical Explosion FTKs.
Pendulum Call	Sets up easy Pendulum Summons with Magician monsters while protecting the player's Pendulum Scales from cards such as Twin Twisters and Wavering Eyes. This card is Unlimited in the TCG.
Preparation of Rites	Adds any Level 7 or lower Ritual Monster from your Deck to your hand, and can recycle a Ritual Spell card from your Graveyard. Mainly hit due to abuse with Nekroz. This card is Semi-Limited in the OCG.
Primal Seed	Can cause OTK and FTK loops: 2 Primal Seed + Macro Cosmos/Banisher of the Light/Radiance + Anything you want to reuse indefinitely = win For example a FTK would be: On your first turn, you Hand Destruction 1 LIGHT and 1 DARK. Then Special Summon the Envoy. Then Normal Summon Banisher of the Light/Radiance. Now, activate Sparks, activate 1st Primal Seed to get Sparks and 1 of the Banished cards, activate the same Sparks, activate 2nd Primal Seed to get 1st Primal Seed and the same Sparks and repeat for Sparks FTK!!! You can do this with any Effect Damage cards, or ATK boosting cards like Limiter Removal, Rush Recklessly, etc. This card is Unlimited in the TCG.
Reasoning	Was used a lot by Turbo and OTK Decks. Free Monster or easily dumps other cards to Graveyard, both of which can be beneficial. This card saw heavy play in Infernoids, which can dump vast amounts of Infernoid monsters for future use, causing it to be re-Limited.
Reinforcement of the Army	Too broad. This card adds additional speed to many Decks, like Evilswarms, Lightsworns, Six Samurais, tellarknights, HEROs, Ninjas, Inzektors (grabs Dark Grepher or Armageddon Knight), and Infernities (for the same reason as Inzektors). Certain Warrior Decks have their own version of this card, which prevents this from going to 2 to assist other Warrior Decks.
Rekindling	Very powerful Spell Card. Can Special Summon as many FIRE monsters from your Graveyard with 200 DEF as possible. Powerful plays with it include reviving multiple copies of Laval monsters like Volcano Handmaiden, Magma Cannoneer, Lancelord, or Forest Sprite (which can all be easily sent to the Graveyard via Molten Conduction Field) to easily Synchro Summon Shooting Quasar Dragon or Red Nova Dragon, reviving Brotherhood of the Fire Fists Spirit and Leopard to Synchro Summon another Brotherhood of the Fire Fist - Horse Prince, or reviving Fire King monsters like Avatar Yaksha and Avatar Barong to make easy Rank 4 Xyz Summons. This card is Unlimited in the OCG.
Royal Tribute	Particularly disruptive when used on the first turn, leaving one vulnerable and unable to retrieve what has been lost because of Necrovalley. You also see their hand by default. This card is Unlimited in the OCG.
Saqlifice	Key Spell Card in Qliphort Decks. Prevents the equipped Qliphort from being destroyed in battle, also it gains 300 ATK and is treated as 2 Tributes for the Tribute Summon of a Qliphort monster, mainly Qliphort Disk (who then Summons 2 more Qliphorts from your Deck for an easy OTK). Can also add a Qliphort Monster from your Deck to your hand when it's sent from the field to the Graveyard. This card is Semi-Limited in the OCG.
Soul Charge	Powerful Spell card. Revives any number of monsters from your Graveyard for easy Synchro/Xyz/Link Summons in almost every Deck. While it forces you to skip your Battle Phase that turn and has an LP cost per the number of revived monsters (if you're reviving fewer monsters, you pay fewer LP, if you're reviving more monsters, you pay more LP), these restrictions are usually offset by the large field advantage offered by Soul Charge.
Symbol of Heritage	Can revive any monster if you have 3 or more copies of that monster in your Graveyard. Can cause loops with cards like Dewloren, Tiger King of the Ice Barrier (Which is Semi-Limited in the OCG and Limited in the TCG) and can be reused with cards like Mist Valley Falcon. Searchable by Hidden Armory and Power Tool Dragon. Probably was Limited due to causing loops with Ancient Fairy Dragon and Elder Entity Norden, or because of Lonefire Blossom coming to 3.
That Grass Looks Greener	Powerful, costless Graveyard setup card that instantly sends cards from your Deck to the Graveyard until you have the same number of cards in your Deck as your opponent. Similar to Monster Gate and Reasoning (both also Limited), but can be better since there is more control over the number of milled cards. Mainly hit due to abuse in 60-card Decks that focus heavily on Infernoid monsters, Paleozoics, and Fairy Tail - Snow (Semi-Limited in the OCG) since it can instantly send 20 cards from your Deck to your Graveyard against most other Decks that run only 40 cards. Can be searched by Left Arm Offering. This card is Unlimited in the OCG.
The Monarchs Stormforth	Allows you to Tribute monsters your opponent controls for Tribute Summons without targeting. Can even be activated during your opponent's turn to disrupt their plays with Ehther the Heavenly Monarch (also Limited in the TCG). Can be searched by Pantheism of the Monarchs (also Limited) or Tenacity of the Monarchs. This card is Unlimited in the OCG.
Upstart Goblin	Previously Limited due to use in Makyura Exodia Decks until Makyura was Forbidden, and later re-Limited after heavy play in the TCG. This card is Unlimited in the OCG.
Bottomless Trap Hole	Very powerful 1-for-1 card. Banishes the monster upon Summon. Staple in most Decks. With the removal of Ignition Priority, this card has gotten better than before. Because it says "when your opponent Summons a monster(s)," if your opponent Summons multiple monsters at once (such as a Pendulum Summon), they all get hit. Can be searched and reused by some of the Traptrix cards. This card is Unlimited in the OCG.
Compulsory Evacuation Device	An easy out to most monsters. With Priority revoked, this card has become even more powerful. Can also be used on your own monsters to save them from Dark Hole, Torrential Tribute, etc. This card is Unlimited in the OCG.
Ceasefire	Chainable, defuses Flip Effects, and unlike its close cousins, checks both sides of the field. With swarming of Effect Monsters being all the rage these days, Ceasefire can be particularly punishing, dealing a maximum of 5000 damage in one shot. At present, quite possibly the best burn card in the game. This card is Semi-Limited in the TCG.
Eradicator Epidemic Virus	Lets you look at your opponent's hand for 3 turns. Stops their Spells or Traps for a long period with an easy-to-pay cost in almost all Decks, with the releases of Number 66: Master Key Beetle and Number 85: Crazy Box. Extremely abusable in Dark World Decks with Grapha, Dragon Lord of Dark World, in Evilswarm Decks with Evilswarm Ophion, and in Dragon Ruler Decks and their variants with Number 11: Big Eye and REDMD. Two of these together can shut down all non-monster cards. This card is Unlimited in the OCG.
Imperial Order	Powerful Spell lock via a Continuous Effect, unlike others that start a chain. This card alone can shut down Decks. However, this card has now been errata'd so that the 700 LP cost occurs during both player's Standby Phases, and it is mandatory, preventing you from turning it off at will during your own Standby Phase.
Infernity Barrier	Powerful Trap card in Infernity Decks that negates almost anything. Is very easy to meet its activation requirements since they don't have any cards in their hand most of the time. Can be searched easily by Infernity Archfiend. This card is Unlimited in the OCG.
Macro Cosmos	Same as Dimensional Fissure. Gives an almost automatic win against another player if they run a Graveyard-reliant Deck and you don't. This card is Unlimited in the OCG.
Magical Explosion	Limited to hinder the consistency of the Magical Explosion FTK.
Ring of Destruction	Was formerly Forbidden for causing too many draws in Tournaments and messing up Ranked Games. Instant destruction and serious burn. Lethal when combined with cards like Barrel Behind the Door or Spell of Pain. However, the effect has now been errata'd so it can only be used during the opponent's turn, can only be used on an opponent's monster with equal to or less ATK than the opponent's LP, and makes you take damage first, so it can't force tied games.
Skill Drain	One card to continuously stop a large number of cards. Works well with cards such as Beast King Barbaros and Decks like Qli and Yang Zing. See also: Skill Drain Deck. This card is Unlimited in the OCG.
Solemn Warning	A lot of effects that Special Summon are present in the game. Paying 2000 LP to use this card is almost always worth breaking a loop that would otherwise generate several large monsters. Even though Bottomless Trap Hole is arguably more powerful with Ignition Priority being revoked, this card can still counter loops and hits monsters which Bottomless cannot hit.
Soul Drain	Many Decks rely on Graveyard and banished effects in the current meta. This card could easily defeat an entire Deck, especially Dark World Decks. This card is Unlimited in the OCG.
Torrential Tribute	Punishes over-extending, but can easily be stopped with Starlight Road and THRIO in most situations. This card is Unlimited in the OCG.
Wall of Revealing Light	Facing three in an Exodia Deck with LP recovery would be a real pain, especially because of Hope for Escape. Combos well with Reversal Quiz. Also abusable with Last Turn and Self-Destruct Button, both of which are Forbidden. This card is Unlimited in the OCG.
Semi-Limited
Atlantean Dragoons	Amazing Searcher. Adds any Sea Serpent from your Deck to your hand when send to the Graveyard as a cost for a WATER monster's effect. Key card in Mermail Decks. Also allows other Sea Serpents to attack directly, therefore gaining Atlantean Marksman's effect. Can easily be searched with Atlantean Marksman, Genex Undine, and Summoner Monk.
Card Trooper	Can be a good beatstick for 1 turn. Sets up the Graveyard for many Decks. When it dies, you draw 1, so no advantage lost. Machine Duplication can be used, so at max, it can be at 2. 3 is not likely, but not impossible in the TCG. This card is Unlimited in the OCG.
Debris Dragon	Highly usable with the number of Level 3 monsters with very low ATK like Lonefire Blossom, Dandylion, Card Trooper, etc. Can easily make LEVEL 7 Synchros like Black Rose Dragon, or higher-Level monsters like Trishula if Tokens are present on the field. Could also be abused in Dragon Ruler Decks (where it was searchable via Tempest) to Synchro Summon Star Eater or to bring back Flamvell Guard or The White Stone of Legend for Level 8 Synchro Summons in Dragon Ruler Decks. This card is Unlimited in the OCG.
Honest	Amazing effect. Allows your monster to run over any other monster, and deal decent damage. Easily reused with Beckoning Light. Abusable with BLS. This card is Unlimited in the OCG.
Performapal Pendulum Sorcerer	This card played a pivotal role in Performapal Pendulum Decks, as it could search out key Performapal cards while triggering the effects of monsters such as Performage Plushfire and Guiding Ariadne. It could also be used to Summon Performage Trapeze Magician, leading to easy OTKs. This card is Unlimited in the TCG.
Reborn Tengu	Replaces itself when it leaves the field. Doesn't care about being Banished. Abusable in Synchro Decks. Similar to Destiny HERO - Malicious, who is Unlimited. However, it was a shocker because it was the first TCG Exclusive to show up on the banlist (not counting Allure of Darkness, which was an emergency Semi-Limit). This card is Unlimited in the TCG.
Scarm, Malebranche of the Burning Abyss	Key searcher in Burning Abyss Decks. Searches any Level 3 DARK Fiend monster during the end phase of when it's sent to the Graveyard, mainly another Burning Abyss monster or Tour Guide from the Underworld (also Limited). This card is Unlimited in the TCG.
Thunder King Rai-Oh	Low Level, high attack, seals search effects, and can negate special Summons. Great counter against most meta Decks, which rely on both of the above. This card is Unlimited in the OCG.
Wind-Up Magician	Summons a Wind-Up monster from the Deck whenever a Wind-Up Monster’s effect activates. The "Once while face-up on the field" restriction is easily overridden by Summoning another copy of itself and activating another effect afterwards. Crazy when comboed with Wind-Up Shark. Can be searched easily with Summoner Monk and Wind-Up Factory. Creates easy Xyz Summons. This card is Unlimited in the OCG.
Card of Demise	Lets you draw until you have 3 cards in your hand. While you can't special Summon or do damage the rest of the turn when it's used, you can set a lot of Traps or activate pendulum scales, making it useful in stun Decks that use a lot of backrow. This card is Unlimited in the TCG.
Chain Strike	Inflicts massive damage if used right. Key card of Chain Burn Decks such as Chain Strike OTK.
Charge of the Light Brigade	It's like ROTA (Limited), but for Lightsworns. It also mills. This card is Unlimited in the OCG.
Dark Hole	Powerful and with no cost, but floating effects, Starlight Road and The Huge Revolution is Over make it harder to play.
Domain of the True Monarchs	A powerful Monarch support card that shuts down numerous Decks that rely on their Extra Deck. It also allows players to Summon powerful Tribute monsters such as Erebus the Underworld Monarch for only one Tribute. This card is Unlimited in the TCG.
Dragon Ravine	Can be used to search any Level 4 or lower Dragunity from your Deck to your hand OR act as a Foolish Burial to send any Dragon from your Deck to the Graveyard for easy Graveyard setup once per turn. Can be searched easily with Terraforming (semi-Limited in the OCG) and Metaverse. Mainly Forbidden to try to kill Dragon Rulers, but with the Dragon Rulers now Forbidden themselves es, it came back to 2.
Fire Formation - Tenki	Basically Reinforcement of the Army (Limited) for Beast-Warriors. Adds lots of speed to several Decks, like Constellars, Gladiator Beasts, Wind-Ups (for Wind-Up Rabbit), Bujins, Fire Kings, Koa'ki Meirus and especially Fire Fists, where it can search just about any Fire Fist monster from your Deck to your hand, and can be searched easily itself with most Fire Fist cards. Can also act as fuel for Fire Fist monster's effects and gives all beast-warriors 100 ATK. Was Unlimited due to Fire Fists not being as good as they once were, but was put back on the list again due to Zoodiac Decks topping in the OCG. This card is Unlimited in the TCG.
Terraforming	Searches any field Spell card. It's especially useful to grab powerful Limited Field Spells such as Divine Wind of Mist Valley, Dragonic Diagram, Chicken Game (Forbidden in the TCG), and Union Hangar (also Semi-Limited in the OCG). This card is Unlimited in the TCG.
Union Hangar	A strong field Spell card that can search out any LIGHT machine union monster when it's activated and can also equip a LIGHT machine Union Monster from your Deck to a LIGHT machine union monster that is Normal or special Summoned. Mainly hit due to ABC Decks that were topping in the OCG because of this card. Can be searched easily by Terraforming (Also Semi-Limited in the OCG). This card is Unlimited in the TCG.
Ojama Trio	Clogs the field with nigh-unusable Tokens, though if a Tuner is present they can be removed via a Synchro Summon. Key card in Burn Decks. This card is Unlimited in the OCG.
Solemn Strike	Powerful Counter Trap card that can negate any special Summon or monster effect for only 1500 LP. Can be somewhat better than Solemn Warning (Limited) due to its lower cost and somewhat broader negation pool, and can be searched by cards such as Guiding Ariadne. This card is Unlimited in the TCG.
No longer on list
Abyss Soldier	Semi Limited from April '05 to Sept '05 due to its abuse with Sinister Serpent, allowing free bouncing, once per turn. After Sinister Serpent got Forbidden, this came off the list.
Apprentice Magician	Was used to get Magician of Faith from your Deck face-down to get access to its effect. Nephthys Decks also used it to search Hand of Nephthys to quickly Summon Sacred Phoenix of Nephthys. The Apprentice Magician > Old Vindictive Magician Monarch combo didn't really contribute to its initial Semi-limitation, so this card came off the list. Also, Flip Effect monsters are considered to be too slow in the current meta.
Archlord Kristya	Strong ATK, seals Special Summons, and is difficult to get rid of since it goes back to the top of the Deck instead of the Graveyard. Generates a +1 when Special Summoned.
Armageddon Knight	Sends ANY Dark monster from your Deck to the Graveyard whenever it's Summoned. Can lead to crazy power-plays just by simply dumping one certain monster and can trigger monster effects like Archfiend Heiress, Elemental HERO Shadow Mist and all the Shaddoll monsters. Can be searched by Reinforcement of the Army, Mystic Tomato, and Summoner Monk. However, it's not used as much as it once was, so it came off the list.
Black Rose Dragon	Universal Nuke. See also: Debris-Hime Deck. Top Decks wouldn't really use more than one in their Extra Deck anyways.
Blackwing - Gale the Whirlwind	Can be Special Summoned in Blackwing Decks very easily. A reusable permanent Shrink. Universal Tuner. However, Blackwings haven't done much in a long time, so it was brought down to 3.
Blackwing - Kalut the Moon Shadow	Can easily turn battles around in Blackwing Decks. Unlike Honest, it can even be used when attacking directly for massive damage. Blackwings aren't as good as they once were so this came back to 3.
Breaker the Magical Warrior	Back when it was Forbidden/Limited, +1 cards were overpowered; Breaker lets you destroy a card almost for free and you'll still have a monster, or you could leave it as a 1900 Beatstick which was quite a lot at the time.
Brotherhood of the Fire Fist - Rooster	Key card in Fire Fists. Adds any Fire Fist monster from your Deck to your hand when Summoned by a Fire Fist monster's effect. Can also search Fire Formation Spell/Trap cards. Can be searched easily with Brotherhood of the Fire Fist - Horse Prince or Fire Formation - Tenki. Can be reused with Brotherhood of the Fire Fist - Spirit or Brotherhood of the Fire Fist - Lion Emperor. This card is Unlimited in the TCG.
Brotherhood of the Fire Fist - Spirit	Key card in Fire Fist 3-Axis Deck. Works well with Brotherhood of the Fire Fist - Rooster and Brotherhood of the Fire Fist - Leopard. Searchable via Fire Formation - Tenki and/or Rooster. At 3, easily makes a new Brotherhood of the Fire Fist - Horse Prince every turn. Also reusable via Rekindling and Crane Crane, and can be returned to your hand via Brotherhood of the Fire Fist - Lion Emperor to start the combo all over again.
Burner, Dragon Ruler of Sparks	Were formerly Forbidden due to being able to easily special Summon their respective Level 7 Dragon Rulers directly from the Deck for easy Rank 7 Xyz Summons and/or Level 8 Synchro Summons. Now that their respective Level 7 counterparts are Forbidden in both the TCG and OCG, these cards came back to 3.
Lightning, Dragon Ruler of Drafts
Reactan, Dragon Ruler of Pebbles
Stream, Dragon Ruler of Droplets
Chaos Sorcerer	Can be Special Summoned easily, decent effect. However, relatively low ATK. With the rise of Chaos Decks, getting this out was even easier than before. Searchable with Justice of Prophecy. Came off the list due to its lack of use in the meta.
Chronomaly Nebra Disk	Adds any Chronomaly card from your Deck to your hand other than itself when Normal Summoned, mainly Chronomaly Crystal Skull (who then searches another copy of this card), and Chronomaly Golden Jet, who can be used to make easy Rank 5 Xyz Summons with this card or with Artifact monsters. Has decent ATK. Can also revive itself from the Graveyard for Rank 4 (or 5 with Golden Jet) Xyz Summons if you only control Chronomaly monsters. Mainly hit due to Chronomaly/Artifact builds topping in the OCG before The Duelist Advent.
Coach Soldier Wolfbark	Key card in 4-axis Fire Fist Decks. Special Summons Level 4 Fire Fist or Fire King monsters from your Graveyard for easy Rank 4 Xyz Summons. At 3, can easily make a new Brotherhood of the Fire Fist - Tiger King each turn. Can be searched easily with Fire Formation - Tenki. Came off the TCG list due to the lack of Fire Fist and Fire King Decks topping.
Constellar Ptolemy M7	Good effect. Can be used in Hieratics, Dragunitys, Constellars, or any Deck that makes easy Rank 6 monsters. Automatically usable after one of your other Constellar Xyz Monsters runs out of Materials. Key card for the Evigishki Gustkraken hand loop, which is not relevant anymore.
Cyber Dragon	Can be Special Summoned easily. Good ATK. Usable in many Decks. However, there are increasing numbers of newer monsters with effects similar to this card, and increasing amounts of newer Decks that can Special Summon "a bunch of monsters in one turn", so older Decks need this. Also, the opponent can use Chimeratech Fortress Dragon against you if you're using machines as well (e.g. Morphtronics, Salvo, Gadgets).
D.D. Assailant	Back when this was initially hit, Warrior Toolbox Decks were Tier 1.
D/D Lamia	A reusable Level 1 tuner that can revive itself for Synchro plays by sending any D/D or Dark Contract card from your hand or field to the Graveyard. This card has not yet been made for the TCG.
D/D Swirl Slime	A polymerization on legs that can Fusion Summon a D/D/D Fusion Monster using D/D monsters from your hand as materials, even itself. It can also banish itself from the Graveyard afterwards to special Summon a D/D monster from your hand.
D.D. Warrior Lady	Same as D.D. Assailant (above). Also, this card had the option to remove the monster, or not to remove the monster. This card doesn't need to be destroyed by battle to remove the opponent's monster, just battling it will do, hence why this came off the list a while after Assailant.
Dark Magician of Chaos	It's a strong monster with a very good effect; its effect even works when it's Special Summoned, making it more powerful than Magician of Faith, who is also Unlimited. Dark Armed Return Decks were godly with this card. However, this card was errata'd so that it can only retrieve one Spell per turn, during the end phase of when it's Normal or special Summoned, allowing it to come off the list.
Dark Scorpion - Chick the Yellow	This + Makyura + Call of the Haunted = OTK, but Makyura is now Forbidden and this card is bad.
Dark Strike Fighter	Was formerly Forbidden due to being able to tribute any number of monsters on your field during either of your main phases to create easy OTK's. Now, they changed the effect so Dark Strike Fighter can only tribute one monster per turn during your main phase 1.
Demise, King of Armageddon	See Demise/Doom OTK. The eventual lack of such Decks in the meta resulted in this card coming off the list.
Destiny HERO - Malicious	This card was used for easy Synchro Summon plays, but came off the list due to its lack of use in the current meta.
El Shaddoll Winda	Key Fusion Monster in Shaddoll Decks along with El Shaddoll Construct (above). Restricts both players to 1 special Summon per turn and can't be destroyed by the opponent's card effects. Can be Fusion Summoned easily with Shaddoll Fusion, Nepheshaddoll Fusion or El Shaddoll Fusion, all of which can also be recycled with this card's effect. Came off the list due to Construct's ban being enough to make Shaddolls irrelevant.
Elemental HERO Bubbleman	Mainly was Limited due to making combos and causing OTKs with Elemental HERO Stratos (Who is Forbidden in the TCG). Can easily make Rank 4 Xyz Summons or Fusion Summons with Miracle Fusion or Mask Change. Second effect can turn around games.
Evilswarm Ophion	Very powerful Rank 4 Xyz with high ATK. Can be Summoned very easily in Lswarm Decks with Evilswarm Castor, Evilswarm Kerykeion, Evilswarm Mandrago, and Rescue Rabbit. Seals special Summons of Level 5 or higher monsters, and can add any Infestation Spell/Trap card from the Deck to the hand, mainly Infestation Pandemic and Infestation Infection.
Exiled Force	Same as D.D. Assailant (above).
Formula Synchron	Easily Summoned with cards like Glow-Up Bulb (also Unlimited; see below) and tokens made by Dandylion. An instant +1. Crazy when comboed with T.G. Hyper Librarian, who is Limited. Can even be used for a Synchro Summon during the opponent's turn.
Gladiator Beast Bestiari	Required to Summon Gladiator Beast Gyzarus, and as a key means of S/T removal. However, Gladiator Beasts haven't done much in a long time, so it came down to 3.
Glow-Up Bulb	Plant Decks were still topping after being hit format after format, Konami must have decided to finally kill them. Extremely consistent in Synchro Decks. Easily recyclable through its own effect, but the effect can only be used once per Duel. This may have also been a hit to Future Fusion FTK Decks (though Future Fusion is now Forbidden). Came back to 3 since Plant Synchro Decks are no longer viable in the current metagame.
Goblin Zombie	Very good searcher. In a Zombie Deck, it can be more abusable than Sangan or Witch of the Black Forest because of their revival power. Not many people would use 3 anyways and zombie Decks aren't topping anymore.
Gorz the Emissary of Darkness	Stops OTKs AND Special Summons a good Token. Turns games around with no real effort.
Goyo Guardian	Very high ATK for a Level 6 Synchro Monster. Good effect. Summons the opponent's monster right away so it can be used for Synchro/Xyz Summons. This card has an erratum that now makes it only Summonable by EARTH tuner monsters, so it came off the list.
Green Baboon, Defender of the Forest	Before, it could be Special Summoned when a Beast was destroyed by battle or by a card effect. This was rather good with a relatively low cost for high ATK. Now they changed the ruling and it can't be used during the Damage Step, so destroying by battle won't Trigger its effect.
Green Gadget	Gadget Decks used to top frequently, but aren't as powerful as they once were. Most Gadget Decks wouldn't run more than 2 of each anyways.
Red Gadget
Yellow Gadget
Injection Fairy Lily	She was considered to be too fast and too strong for the format at the time. Now there are Decks other than beatdown types, so this came off.
Jinzo	Very popular early in the game's history since back then the game was slow enough to allow for monsters to be Tribute Summoned. Then the metagame picked up speed, where Special Summons became more favourable, and Jinzo dwindled in popularity due to both Royal Decree and presence of better monsters to Special Summon, so it came off the list. Naturia Bamboo Shoot is also a Tribute monster, but it also stops Spells and not just Traps, although it is less splashable.
Judgment Dragon	Can be Special Summoned easily in Lightsworns. Low cost to nuke the Field except itself. 3000 ATK. Double JD is broken, especially when they can be returned to your hand with Beckoning Light. However, in the OCG with the new Priority ruling change, the increase of anti-Special Summon cards for high Level/LIGHT (chaos) monsters, and Lightsworns not topping much might have been the reason to unlimit this.
Kuribandit	Splashable Level 3 monster with a good effect. Tributes itself to send the top 5 cards from your Deck to the Graveyard during the End Phase of turn it's Summoned, also it can add one Spell/Trap among those (namely cards like Soul Charge, Monster Reborn, Harpie's Feather Duster, etc.) to your hand. This card is Unlimited in the TCG.
Legendary Six Samurai - Shi En	Stops 1 Spell or Trap every turn. Very easily Summoned in Six Samurai. Can prevent himself from being destroyed if there's another Six Sam out. Came off the list due to the lack of Six Samurai in the meta.
Light and Darkness Dragon	See Perfect Circle. Not as abusable now that Tribute Summoning is considered slow.
Lonefire Blossom	Search and Special Summon ANY plant; this includes Sylvans, Tuners, Dandylion, Mystic Tomato, Tytannial, Princess of Camellias, Gigaplant, etc. Doppel-Plants and quite a few other Plant-type Decks were also topping tournaments for a long time. Formerly abused in Synchrocentric, but it's not as good as it once was anymore, so it came down to 3.
Lumina, Lightsworn Summoner	Easy effect that special Summons a Lightsworn monster from the Graveyard. Gives uses to cards that are useless in the hand (e.g. Wulf, Lightsworn Beast). Nice mill effect. Since Lightsworns aren't topping anymore, this came off the list.
Magician of Faith	Allows the player to reuse Spells Cards, mostly ones with broken effects like Harpie's Feather Duster (Forbidden in the TCG and Limited in the OCG), Dark Hole and Soul Charge (Limited). Was part of the Goat Control and Tsukuyomi Lockdown Decks. Came off the list due to being too slow for the current metagame.
Manju of the Ten Thousand Hands	Adds any Ritual Spell or monster to your hand when Normal or flip Summoned. Mainly hit due to abuse in the Nekroz archetype in the OCG.
Manticore of Darkness	There is an OTK with this card (but it's too inconsistent with the current format), and it worked well with Card of Safe Return (now Forbidden).
Marauding Captain	Same as D.D. Assailant (above).
Marshmallon	Relatively hard to kill. Instantly inflicts 1000 damage, which is quite a lot. However, Spirit Reaper went back to 3, so it was inevitable that this would also go back to 3 due to the high quantity of removal power.
Mask of Darkness	Well, Royal Oppression (now Forbidden) became Limited when this became Unlimited, not that anyone was using this card anyway. Used to be part of the Tsukuyomi Lockdown, but isn't anymore with Time Seal now Forbidden.
Mermail Abyssgunde	Key card in Mermail Decks. Special Summons any Mermail from your Graveyard when discarded to the Graveyard. Good monsters it can revive include Mermail Abysspike, Mermail Abysslinde, Mermail Abyssdine, Mermail Abyssmegalo, Mermail Abyssteus, or Mermail Abyssleed for easy combos and Xyz Summons. Can be searched by Mermail Abyssteus (below) and reused with Salvage or Mermail Abyssturge. Came off the TCG list due to the lack of Mermails in the current meta.
Mermail Abyssteus	Key card in Mermail Decks. Can be Special Summoned easily. Adds any Level 4 or lower Mermail monster from your Deck to your hand when Summoned by its effect. Can be searched easily with Abyss-sphere and reused with Abyss-squall or Mermail Abyssgunde (above).
Mezuki	Creates +1 Summons. Effect is easy to pull off and reuse. Staple in almost any Zombie Deck to generate loops and OTKs. Easily searchable with Foolish Burial or Lavalval Chain, and reusable with Burial from a Different Dimension. Was Unlimited since Zombies are no longer as good as they once were.
Necro Gardna	Easily used in Lightsworns, and reused with Burial from a Different Dimension (however, this is Limited). Lightsworns have not been topping lately due to their relative inconsistency, so this was Unlimited to give them a chance in the current meta.
Number 11: Big Eye	Very powerful Rank 7 Xyz Monster. Good effect. Can permanently take any opponent's monster, with no restriction about how it can be used, although it can't attack the turn it uses its effect. Came back to 3 since the main Decks that Summoned this so easily (Dragon Rulers and Mermails) are dead and irrelevant, respectively.
Phantom of Chaos	Was formerly abused in Sky Scourge Norleras Decks. Once those Decks stopped doing well, this was allowed to go back to 3.
Plaguespreader Zombie	Universal reusable Tuner. Its downside can be overridden by playing a search card afterwards, thus shuffling your Deck. Was taken off the list due to zombie/Synchro Decks that used this not topping anymore.
Protector of the Sanctuary	Formerly abused with things like Time Seal and Yata-Garasu as an additional layer of insurance for such a lock since the opponent could only break the lock by drawing with a card effect. Time Seal and Yata-Garasu soon got Forbidden, leaving no reason to limit Protector of the Sanctuary.
Raiza the Storm Monarch	Raiza was overused in Monarch Decks, and that was Tier 1 back then. Caius was released, along with other faster Decks so this was let off. Caius is now considered to be better anyways.
Reflect Bounder	At the time they Limited this, Chaos Decks were Tier 1. The Envoys were also Forbidden at this time, but they realized that this didn't really need to be hit as hitting the Envoys was enough, so this later this came off.
Sacred Phoenix of Nephthys	At the time when it was Limited, destruction by effects were the metagame, especially with Gadget Decks using this to its fullest. Nephthys could come back persistently, destroying backrow at the same time. Then the metagame picked up speed with both chainable Traps and Removal Decks becoming more popular, and use of Nephthys died down and it came off the list.
Sangan	Universal searcher. Easily searched by Tour Guide From the Underworld and reused by Crane Crane. Adds a ton of consistency. This card came off the list due to an erratum that prevents you from using the effects of the added monster that turn.
Senju of the Thousand Hands	Same as Manju of the Ten Thousand Hands (above).
Sinister Serpent	Free discard for costs, etc. Turns discarding into a +0. Really annoying to be against with The Dark Door. Can be sent from your Deck to the Graveyard through Foolish Burial. This card was errata'd to force it to banish itself from your Graveyard during your opponent's next end phase if it's still there by then.
Snipe Hunter	Formerly abused in Gadget Decks due to massive hand advantage to fuel its effect. The lack of Gadget Decks around resulted in it coming off the list.
Spirit Reaper	Can't be destroyed by battle, but unlike Marshmallon, it destroys itself the moment it is Targeted. Its other effect is great, except against Dark World, which is not relevant. Came of the list due to its lack of use in the meta.
Spore	Related to Glow-Up Bulb, who is also Unlimited. Universal Tuner. Very potent Level altering effect. It is currently unknown why this card didn't go to Unlimited in the September 2012 format (its effect can only be used once per Duel, so no one ran more than one).
Star Seraph Sovereign	Key card in the Seraph engine. Allows for easy combos, pluses, and Rank 4 Xyz Summons when used in combination with other Seraph cards or tellarknights.
T.G. Striker	A Cyber Dragon-like Level 2 Tuner. Can start fast Synchro Summoning variety without using the Normal Summon. Came off the list due to its lack use in the Meta.
The Agent of Mystery - Earth	It's like Stratos for Agents, and he's Forbidden in the TCG. It's also a Tuner. Came off the list due to Agents not being relevant anymore.
Thousand-Eyes Restrict	Has a once powerful lockdown effect. Was part of the Goat Control Deck. Easily Fusion Summoned with Instant Fusion. Easily revived because of its low ATK and low Level (e.g. Graceful Revival and Limit Reverse). You can use Instant Fusion, use its effect, then Tribute it for a Monarch. However, this is rather slow for the current meta, so it came back to 3.
Tragoedia	Stops OTKs AND has other great effects. Can get very strong, can take opponent's monsters, or even alter its own Level for Synchro/Xyz shenanigans.
Treeborn Frog	Yes it's a free Tribute, but you can only activate 1 anyway. So, Limiting isn't going to do much. Semi-Limit is still OK because the new removal cards tend to remove 2 at once.
Tsukuyomi	Reusable Book of Moon effect. Was part of the Tsukuyomi Lockdown, but not anymore with Time Seal Forbidden. Not as good as it once was, so it came off the list.
Twin-Headed Behemoth	Monarch Decks used to run 3 at the time, keeping a monster to Tribute on the field whether it was destroyed by battle or by a card effect. Then a new ruling was made: "The effect of "Twin-Headed Behemoth" can only be used ONCE throughout the entirety of the Duel. Even if your Deck includes three copies of the card, between those three copies the effect can only be used once, not once each." This card became Unlimited after that ruling was released, and Monarchs then received Treeborn Frog (see above) and that replaced this card, even if the ruling wasn't made.
Vampire Lord	See Sacred Phoenix of Nephthys (above).
Wind-Up Shark	Can be special Summoned whenever another Wind-Up monster is Summoned. Can be searched easily by Summoner Monk and Wind-Up Factory. Works very well with Wind-Up Magician (Limited in the TCG). Creates easy Rank 3-5 Xyz Summons.
Wisdom-Eye Magician	Key card in the Magician Pendulum engine. Can destroy itself to search ANY Magician Pendulum monster in its place, while stashing itself away later for a Rank 4 Xyz or Odd-Eyes Fusion Summon. Can be searched easily with Pendulum Call or Performapal Skullcrobat Joker (also Limited) or Odd-Eyes Pendulum Dragon and easily reused with Nobledragon Magician.
A Hero Lives	Generates OTKs. Can be used with Elemental HERO Stratos (Which is Forbidden in the TCG), who then searches for Elemental HERO Bubbleman, to swarm the field without using the Normal Summon. The steep cost, on the other hand, restricts early playability.
Advanced Ritual Art	See Heralds combo and Demise/Doom OTK Decks. Not as broken as it used to be since the game got faster.
Allure of Darkness	The most splashable draw card since Pot of Greed. Its "downside" can be used for Graveyard setup.
Black Whirlwind	Gives major hand advantage to Blackwing Decks. However, Blackwings haven't been competitive in the meta in a long time, so it was brought back to 3.
Book of Taiyou	Formerly abused in Empty Jar Decks to force the activation of Cyber Jar, Morphing Jar, and Morphing Jar 2. They aren't topping anymore, so this came up to 3. Also, Cyber Jar is Forbidden now anyways, and so is Morphing Jar and Morphing Jar 2 in the TCG.
Creature Swap	Formerly considered too strong for the meta back when there weren't as many removal cards.
Destiny Draw	Works very well with Destiny HERO - Malicious and is a godsend to Diamond Dude Turbo. Was a Semi-universal draw engine. Lack of relevant Destiny HERO monsters in general caused this card to come off the list.
Dragon Shrine	A Foolish Burial for Dragons (below). Additionally, if you sent a Normal Dragon to the Graveyard with this, you can send another Dragon-type monster to the Graveyard as well. Mainly hit to slow down Dragon Rulers in the OCG but with them now Forbidden, it was Unlimited.
E - Emergency Call	Searches ANY Elemental Hero, including Stratos (who is Forbidden in the TCG), who then searches something else. With ROTA at 1, A Hero Lives at 3, and Pot of Duality at 3, HEROs has way too much search power, and it allowed them to run ridiculously low monster counts.
Emergency Provisions	Formerly abused with Mirage of Nightmare, which is now Forbidden. Combos well with Good Goblin Housekeeping (also Unlimited) to draw several cards from your Deck at once.
Fissure	A 'one for one' card that was rarely used outside of Gadget Decks, and faster Decks that could cope were made, so this came off.
Gold Sarcophagus	Adds any card from your Deck to your hand. Removes the card face-up. Abusable with Dragon Rulers (now Forbidden) and cards such as Necroface (Semi-Limited in the TCG). However, takes 2 turns before the card gets to your hand, which is rather slow nowadays.
Hieratic Seal of Convocation	Similar to E - Emergency Call, but with Hieratics. Opening with it pretty much meant you would OTK.
Instant Fusion	Instantly Fusion Summons any Level 5 or lower Fusion Monster from your extra Deck for easy Synchro or Xyz Summons. Mainly hit due to a two-card FTK involving this card and Elder Entity Norden but with Norden now Forbidden, this came off the list.
Level Limit - Area B	Excellent stalling device for no cost, effectively locking out most Decks that use lots of high-Level monsters. However, it does not affect Xyz Monsters, also most stall cards are bad now. Similar to Gravity Bind, which also went back to 3.
Lightning Vortex	Limited due to abuse with Sinister Serpent for cheap frying of the opponent's face-up monsters. It still saw some abuse since there were 2 Night Assailants still on the list. It finally came off the Limited status after Night Assailant hit 1 on the next list.
Mage Power	Was considered too strong back when beatsticks won Duels on their own. Equip cards are considered slow now and they most likely won't stick around with S/T removal cards being popular these days.
Magical Stone Excavation	Allows quick reuse of major Spell Cards. Its heavy cost is often circumvented in Diamond Dude Turbo Decks. Empty Jar Decks love this, but with Morphing Jar #2 and Morphing Jar Forbidden in the TCG, those Decks are unplayable now, so it came off the list.
Megamorph	Doubling original ATK can be a lot, sometimes enough to OTK. The drawback of halving ATK when you have more LP isn't too bad either as you can always equip it to your opponent's monsters. However, Equip Spells are still bad and have gotten worse now with s/t removal, also beatsticks don't mean as much anymore.
Mystical Space Typhoon	Fast. Staple. 1 for 1 card.
Nobleman of Crossout	Was formerly considered to be too powerful back when most Decks couldn't do more than set a monster before ending their turn. Like Fissure (above), faster Decks that could cope with one for one cards like this were made over time, so this later came off the list.
Overload Fusion	Back then, Future Fusion comboed with this to provide a large beatstick; nowadays, beatsticks don't mean as much as they once did, and Future Fusion has been slowed down.
Pot of Duality	Lets you choose one of the 3 top cards of your Deck without losing hand advantage. Sets up for big plays. Adds a lot of consistency.
Sacred Sword of Seven Stars	Similar to Allure of Darkness, which is Semi-Limited in the TCG, but could be abused with Dragon Ruler monsters to trigger their effects when banished by this card's effect. However, with the Dragon Rulers now Forbidden, this came back to 3.
Scapegoat	Stalls quite a bit. However, there are more cards that Pierce now. Allows for the Synchro Summoning of almost any Synchro. Was part of the Goat Control Deck, but most of the key cards of that Deck are either Limited or Forbidden. Came off the list due to its lack of use in the meta.
Shien's Smoke Signal	Grabs key Samurais like Kageki and Kagemusha. Came off the list due to the lack of Six Samurais in the meta now.
Smashing Ground	Fissure became Unlimited in the format before this came down, so this followed.
Spellbook of Fate	Chainable, powerful Spell card in prophecy Decks that can get over almost anything. Can easily banish an opponent's card without Targeting by banishing 3 Spellbook Spell cards from your Graveyard (which can act as setup for Spellbook of Eternity), or can flip Spellbook Magician of Prophecy face-down to reuse its effect again. Can be recycled with The Grand Spellbook Tower or Spellbook of Eternity (after banished with another copy of Fate or High Priestess of Prophecy).
Swords of Revealing Light	Stalls for quite a long time. You can still attack while the opponent cannot. Came off the list due to Stalling cards being bad now.
Temple of the Kings	Was formerly Forbidden due to being able to create easy Trap FTK's due to the lack of a once per turn restriction. Now the first effect has been errata'd to once per turn. Second effect allows you to Summon almost anything you want, which can work well with Phantom of Chaos (above) copying Mystical Beast of Serket.
United We Stand	Yes it makes monsters into bigger beatsticks, but with so many cards to stop it (e.g. Book of Moon, Dimensional Prison, Mystical Space Typhoon, etc.) it came off the list.
Abyss-sphere	Great searcher. Special Summons ANY Mermail from your Deck. Can quickly Summon Mermail Abyssteus, Mermail Abyssmegalo, or Mermail Abyssleed for Rank 7 Xyz plays. Works very well with Mermail Abysslinde. Can be searched easily by Mermail Abyssmegalo. The lack of Mermail Decks being competitive caused this card to leave the list.
Call of the Haunted	Much fairer speed when compared to its Spell counterparts. It can't be abused multiple times per turn (unlike Premature Burial). It can only special Summon from your own Graveyard (unlike Monster Reborn). Played a crucial role in the Dark Scorpion/Makyura OTK. Like Magic Cylinder, top Decks eventually didn't play this card much, so it probably came off the list for the same reason. Most Decks that still run it wouldn't use 3.
Crush Card Virus	Could formerly kill almost every monster your opponent had in their hand, field, and next 3 draws when it was played, but now the effect has been errata'd so that it only destroys monsters with 1500 or more ATK on the opponent's field and hand when activated, and can also let the opponent destroy 3 monsters with 1500 or more ATK from their Deck, potentially setting up their Graveyard. Furthermore, the opponent takes no damage until the end of the next turn.
Deck Devastation Virus	Can take out universal searchers and the monsters they bring out. Its tribute requirement can be easily met, especially in Dark World Decks.
Dimensional Prison	Easily banishes an opponent's monster with nothing but the opponent attacking. Gets over many monsters that have destruction immunity effects, as it banishes and does not destroy.
Drop Off	This card got Limited at the same time Time Seal initially got Forbidden. Then they realized that stopping a Draw is completely different from discarding a drawn card, with Decks which use the Graveyard more often, and being a 'one for one' card, this was "dropped off" the list.
Exchange of the Spirit	Was formerly one of the most notorious FTK cards in the game, allowing you to Deck out your opponent with this card alone once you filled your Graveyard with 15 or more cards then flipped this, or activated it on your turn if you used Makyura (Forbidden) or Temple of the Kings (also Unlimited). Now, it can only be used once per Duel, and can only be used when both players have 15 or more cards in their Graveyard, not just you.
Geargiagear	Key card in Geargia Decks. Special Summons any two Geargiano monsters from your Deck at no cost, and it also increases their Levels by 1 for easy Rank 4 Xyz Summons, or for Synchro Summons with Karakuri tuner monsters or Genex Ally Birdman (who is Limited).
Good Goblin Housekeeping	Back then, this Draw power was extremely good. It's bad now.
Gravity Bind	Stalls a lot, but Xyz Monsters aren't affected by it (Rank ≠ Level), also stall cards are bad now.
Icarus Attack	Powerful Chainable 2 for 2 card, which made Blackwings lethal. Now that they aren't topping much, and with S/T removal being popular, this came off the list.
Magic Cylinder	Negates an attack and inflicts major burn damage. Finishing move. Moved off the Limited List due to its lack of use in the meta.
Mind Crush	1 for 1 card. You don't really need to be a psychic to use this card, as you can easily call a card name after the opponent has used a search/retrieval effect, like Salvage, Machina Gearframe, Gadgets, etc. Allows you to see opponent's hand. Also, this card owns Ritual Monsters, when they activate their Ritual Spell Card, chain this and call the name of their Monster; a 2 for 1. The intended "downside" of calling a card wrongly can also benefit Dark World/Fabled cards. The lack of overall use in the meta perhaps resulted in it coming off the list. Like Magic Cylinder and Call of the Haunted (above), most people wouldn't use 3 anyway.
Mirror Force	Solid game changer, although with Starlight Road and THRIO out you need to be more careful when using this card. Most likely went to 3 due to lack of use in the meta, also monster destruction being less powerful now.
Needlebug Nest	Mills the top 5 cards from your Deck to the Graveyard for easy Graveyard setup. Mainly hit due to abuse in Shaddolls, Lightsworns, and Dragon Rulers, all of which were topping in the OCG at that time.
Reckless Greed	People wanted to stack these cards together...then was Unlimited again when fair shuffling techniques were enforced. JK, see why Upstart Goblin (above) was Limited.
Royal Decree	1 card to continuously stop a large number of cards. Works well in Herald Decks to prevent the activation of Counter Trap Cards.
Sinister Shadow Games	Strong Trap card in Shaddoll Decks. Sends any Shaddoll monster from your Deck to the Graveyard AND can flip face-up a Shaddoll monster on your field, allowing you to get the effects of both the sent monster and the flipped monster. Can be searched by Shaddoll Hedgehog and reused by all the Shaddoll Fusion Monsters. Came off the list due to Construct's ban being enough to make Shaddolls irrelevant.
The Transmigration Prophecy	OCG stall Decks used this with D.D. Borderline. Also, it was at 1 so it couldn't loop with another copy of itself. Pot of Benevolence does the same thing, but that can't be chained to an effect, and that banishes itself so it can't return another copy of itself. Came off the list due to looping it being too slow for the current meta.