Chronomaly

"Chronomaly", known as "OOPArts" ( Ōpātsu) in Japan, is an archetype of cards used by Trey in the Yu-Gi-Oh! ZEXAL anime. Most are either EARTH or LIGHT-Attribute, and Rock or Machine-Type. The OCG name, "OOPArts", is an acronym for "Out-Of-Place ARTifact", a term used to describe artifacts that make no logical sense given the technology available at the time they were created. Such objects were also featured as part of the "Ancient Treasure" series in the Yu-Gi-Oh! 5D's anime. The TCG name, "Chronomaly", is a portmanteau of the word "chronology" which is the sequential order in which past events occur and "anomaly" as in an irregularity or something odd. Put together these monsters are "chronological anomalies" or "chronomalies" since these objects deviate from what would have been possible to create given the resources and technology available at that time.

Their effects support each other well, enabling quick swarming and Xyz Summons of Rank 5 Xyz Monsters, particularly through the LIGHT-Attribute monsters.

Playing style
"Chronomaly" monsters are focused on Xyz Summoning a wide range of Xyz Monsters. Many of their effects allow Special Summoning of more "Chronomaly" monsters. Support cards for their Types and Attributes can aid them in this. There are many support card that you can use; when playing with this archetype, the use of "Foolish Burial" can come in handy when utilizing the effect of "Crystal Bones". Also, adding cards such as "Mind Control" can also make this archetype very offensive. The "Tour Guide From the Underworld" and "Sangan" engine can really speed the Deck up and also make "Black Luster Soldier - Envoy of the Beginning" usable in it.

Ancient Gear Chronomaly Gadget Mix
This Deck has a combination of "Ancient Gears" and "Gadgets", but only the former is necessary. The trick of this Deck is having "Geartown" on the field as a threat and getting "Chronomaly" monsters out with a "Gadget" engine.

Chronomaly OTK
This Deck focuses on using the effects of "Number 33: Chronomaly Machu Mech" and "Number 36: Chronomaly Fork Hyuk" to perform a One Turn Kill.

What you need:
 * Four monsters in your field (two needs to be Level 5 and the others Level 4)
 * "Number 33: Chronomaly Machu Mech" and "Number 36: Chronomaly Fork Hyuk" in the Extra Deck
 * Your opponent has a monster with 1800 or more ATK

How it works:
 * The four monsters you need are: two Level 5 to summon "Number 33" and another two Level 4 to summon "Number 36":
 * You can Special Summon "Chronomaly Crystal Bones" with its own effect, use its effect to summon "Chronomaly Golden Jet" (and use its effect to increase its Level), Normal Summon "Chronomaly Nebra Disk" to search "Chronomaly Moai" or "Chronomaly Tula Guardian" and then Special Summon it with its own effect
 * Remember that you cannot use "Chronomaly Technology" and Special Summon non-"Chronomaly" monsters in the same turn.
 * Xyz Summon "Number 33" using the two Level 5 monsters and "Number 36" using the two Level 4 monsters.
 * Activate the effect of "Number 36", target 1 of your opponent's monsters with at least 1800 ATK. The targeted monster's ATK becomes 0.
 * All following calculations will be done with the assumption that that monster had exactly 1800 ATK.
 * Use the effect of "Number 33" on the monster that was targeted by the effect of "Number 36" to inflict 1800 effect damage to your opponent. Then "Number 33" gains ATK equal to the amount of damage inflicted. This makes its total ATK 4200.
 * Enter the Battle Phase and attack your opponent's monster that was targeted by "Number 36", then attack directly dealing a total of 6000 damage.

1800 ("Number 33's" first effect) + 4200 ("Number 33's" ATK) + 2000 ("Number 36's" ATK) = 8000 damage

Notes:
 * Each copy of "Chronomaly Pyramid Eye Tablet" gives ATK + 800 to both Numbers, allowing the combo to work with monsters with ATK less than 1800.
 * If you don't have "Number 36", you can use "Mini-Guts", "Chronomaly Cabrera Trebuchet", "Gorgonic Guardian" or "Darkworld Shackles" as a Plan B.

Weaknesses
Since most "Chronomaly" cards involve swarming, mass-removal cards like "Dark Hole", "Torrential Tribute" and "Deck Devastation Virus" can interdict "Chronomaly" monsters before they have a chance to infest the field with the latter-most aforementioned card perhaps being the deadliest to this Deck due to the card’s lingering effect and all the non-Xyz "Chronomaly" monsters in the OCG/TCG (except "Wings Sphinx") sporting 1500 or less ATK. "Light-Imprisoning Mirror" also poses a threat to their swarming and effects, as most "Chronomaly" monsters have LIGHT as their Attribute. However, "Mind Drain" can be worse in countering their Special Summoning as a lot of key Level 5 "Chronomaly" monsters (i.e. "Moai" and "Moai Carrier") are helpful in Xyz Summoning "Machu Mech".

In addition, cards like "Summon Limit", "Narrow Pass" and any cards that render Monster Card Zones useless (i.e. "Ground Collapse") can bar them from the Field completely ("Summon Breaker" can also flat-out pause a spamming "Chronomaly" player's turn completely). In fact, these countermeasures, combined with anti-Special Summoning support, can almost completely shut down "Chronomaly" Decks. Finally, most "Chronomaly" monsters have scanty DEF—if "Chronomaly" Duelists go on the defensive, Defense Position-destroying card effects and piercing cards can be added boon against "Chronomaly" Decks. If you want to go on the defensive use "Giant Soldier of Steel" in your Extra Deck against burns and monsters with 1900 or more ATK.