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Rock ( (がん) (せき) Ganseki) monsters are an often-overlooked Type, though there were many released in The Lost Millennium. Usually, Rock monsters belong to the EARTH Attribute and possess high DEF and defense-related card effects. A significant number of Rock monsters have effects related to Flip Summoning or have the ability to flip themselves face-down again.

Some of the more notable cards include: "Giant Soldier of Stone", "Granmarg the Rock Monarch", "Fossil Dyna Pachycephalo", "Block Dragon", "Gorgonic Guardian", and "Morphing Jar".

With the introduction of the "Koa'ki Meiru" archetype, Rock-Types gained some high-ATK monsters focused on heavy control. "Koa'ki Meiru Guardian" allows negation of monster effects, "Koa'ki Meiru Sandman" can negate Trap Cards, "Koa'ki Meiru Wall" can negate Spell Cards and "Koa'ki Meiru Overload" can negate Summons. Each with 1900 ATK points, these three can be used to switch from the classic defensive builds to more aggressive builds. They can be searched with "Koa'ki Meiru Boulder", also a Rock-type. With monster destruction available via "Mormolith", and some Anti-Meta capabilities with "Fossil Dyna Pachycephalo", Rock Decks can take the offensive or get a solid defense, easily switching between these strategies.

Five Field Spell Cards exist that work particularly well with Rock monsters. "Wasteland" increases the ATK and DEF of Rock monsters by 200, "Canyon" inflicts double Battle Damage to anyone attacking a Defense Position Rock monster with a weaker monster, "Catapult Zone" offers some protection against destruction. Rock-Type monsters are also weak against the card, "Breath of Light".

They also have their own Structure Deck, Structure Deck: Invincible Fortress.

The only main character in the anime to use a Rock Deck is Jim Crocodile Cook, although other characters do use Rock-Type monsters. Yugi Muto uses the "Magnet Warriors", Jaden Yuki uses "Neo-Spacian Grand Mole", Yusei Fudo uses "Rockstone Warrior", Jack Atlas uses the "Piece Golems" and "Power Giant" and Yuma Tsukumo uses the "Gogogo" monsters.

"Megarock Dragon" and "Gaia Plate the Earth Giant" rely on banishing monsters in the Graveyard to special summon themselves, which can be extremely useful when mixed with "Release from Stone", which special summons a rock monster from the banished zone. Cards that take away the ability to banish cards from the Graveyard pose a serious threat to some rock decks.



Play styles

Bouncing Rock Control Deck

The point of this Deck is to restrain the opposition while supporting field advantage using the bouncing effects and high DEF of Rock monsters, then attack for about 1000-2000 damage every turn.

Many good cards are in Structure Deck: Invincible Fortress. There are also several Trap Cards that destroy face-up monsters, and many Rock monsters can flip themselves face-down. Keep in mind the opponent will attack high DEF monsters to keep them from Flip Summoning and activating effects, so punish them with cards like "Shifting Shadows" and "Canyon". See Stone Statue of the Aztecs (character) for some good ideas.

Opponents may be intimidated from attacking, so "Battle Mania" can force them to do a lot of damage to themselves, particularly with cards like "Canyon" or "Continuous Destruction Punch".

Beware mass monster removal cards like "Dark Armed Dragon" and "Dark Hole".

Rock Anti-Meta (Rock Stun)

Rock Anti-Meta (commonly referred to as "Rock Stun") Decks use Rock-Type and other monsters that have meta-breaking effects to counter the current Metagame. The Deck can be played in a variety of ways. Some builds splash Rock monsters into a standard Anti-Meta build with cards such as "Thunder King Rai-Oh", "King Tiger Wanghu" and "Doomcaliber Knight". Other builds focus on a more aggressive play style, often using only Rock monsters and playing "Solidarity" to gain 2700 ATK "Koa'ki Meiru" monsters and a 2000 ATK "Fossil Dyna Pachycephalo". Still other builds use a pseudo-Macro Cosmos Deck to counter common effects that resolve in the Graveyard, while using cards such as "Release from Stone" and other cards like "Core Blast" to set up combos and gain field advantage, while using the "Koa'ki Meiru" monsters to hinder the opponent's strategies.

Catapult Rock Stun

With the release of "Catapult Zone" and "Block Golem" in "Return of the Duelist", Rock Stun focuses not only on anti-meta, but also on controlling the field and filling the Graveyard with monsters for their ace monsters "Block Golem" and "Gaia Plate the Earth Giant".

Aggressive Rock Bounce Deck

This deck uses the bounce effect of Golem Sentry to continually return the opponent's monsters back to their hand, leaving them open to attacks by stronger rock monsters. Gigantes works well because of its high 1900 ATK and its ability to be Special Summoned also working as a possible Spell and Trap removal. Also the Effect of Mirage Dragon will help allow Direct Attacks without worrying about Traps. Giant Rat works to keep Monsters on your side of the Field. Its ability to Special Summon Golem Sentry, Criosphinx, Moai Interceptor Cannons and Neo-Spacian Grand Mole gives you great flexibility.

Rock Swarm Deck

This Deck utilizes the card powerful Rock beatsticks like: Koa'ki Meiru Guardian, Koa'ki Meiru Wall, Gogogo Giant and Koa'ki Meiru Sandman. One of the major differences between this Rock Deck and other Rock Decks, is that it special summons. While most Rock decks rely on flip effects to take down the opponent, this deck relies on swarming the field with huge beatsticks and/or several rock floaters that provide both field advantage and a host of power plays. It's key card is Block Golem. This card allows you to summon any two level four or lower rock type monsters from your graveyard by sending itself to the graveyard. From here you have access to rank 3 and 4 xyzs like Acid Golem of Destruction, Gem-Knight Pearl and the like. Its has two ace monsters: Gaia Plate the Earth Giant and Grandsoil the Elemental Lord. other cards that may be useful for this deck due to their easy summoning requirements and/or deck thinning abilities are Naturia Cliff, Naturia Rock, Chronomaly Crystal Bones,and Chronomaly Crystal Skull. It is recommended that the deck is comprised of EARTH monsters, as Block Golem cannot activate its effect if there are any other attributes in the graveyard. You can use several spell and trap cards to dump rocks from your deck to the graveyard to fulfill the summoning requirements for the ace cards in the deck.

Rock Surge Deck

Surprisingly, a large number of monsters in a typical Monster Surge deck are Earth. This Deck combines them with Rock Swarm for excellent synergy and versatility. Milling cards fill the graveyard with Rock and Earth monsters quickly for fast swarming setups and Gaia Plate the Earth Giant, which will kill almost any beatstick. Earth tuners like T.G. Striker and Glow-Up Bulb enable access to Naturia Synchros - when combined with Rock Stun monsters, the opponent can get locked down hard. Remember to run few Spell Cards (only one recommended) so as not to interfere with Witch of the Black Rose or Gallis the Star Beast.