Rock / Effect

Once per turn, you can flip this card into face-down Defense Position. When this card is Flip Summoned, destroy 1 monster on your opponent's side of the field.

Fiend / Effect

When this card is Normal Summoned: You can target 1 "Evil Eye" card in your GY, except "Medusa, Watcher of the Evil Eye"; add it to your hand. If this card is equipped with "Evil Eye of Selene" (Quick Effect): You can target 1 monster in your opponent's GY; banish it. You can only use this effect of "Medusa, Watcher of the Evil Eye" once per turn. Once per turn, during the next Standby Phase after this effect was activated: Banish 1 card in your GY.

Fiend / Effect

If this card attacks a Defense Position monster, inflict piercing battle damage. If this card inflicts battle damage to your opponent: Make your opponent discard 1 random card.

Fish / Effect

If "Umi" is on the field: You can activate this effect; your WATER monsters can attack directly this turn. During your opponent's Battle Phase (Quick Effect): You can target 1 face-up monster your opponent controls; destroy it. If this card on the field is destroyed by battle or card effect: You can either add to your hand or Special Summon 1 WATER Warrior monster from your Deck or GY. You can only use each effect of "Mega Fortress Whale" once per turn.

Thunder / Normal

Rolls along the ground releasing bolts of electricity to attack its enemies.

Remove 10 Spell Counters from your field; destroy all cards your opponent controls.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. During the Main Phase (Quick Effect): You can discard this card; Ritual Summon 1 "Megalith" Ritual Monster from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. When your opponent activates a card or effect that targets a card you control (Quick Effect): You can place 1 Ritual Monster from your GY on the bottom of the Deck, and if you do, negate that activation, and if you do that, destroy it. You can only use each effect of "Megalith Aratron" once per turn.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. You can discard this card; Ritual Summon 1 "Megalith" Ritual Monster from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. If this card is Ritual Summoned: You can target cards your opponent controls, up to the number of Ritual Monsters with different names in your GY; destroy them. You can only use each effect of "Megalith Bethor" once per turn.

You can target 1 "Megalith" monster in your GY; Special Summon it in Defense Position, but place it on the bottom of the Deck when it leaves the field (even if this card leaves the field). You can only use this effect of "Megalith Emergence" once per turn.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. If this card is Ritual Summoned: You can add 1 "Megalith" Spell/Trap from your Deck to your hand. During your Main Phase: You can activate this effect; Ritual Summon 1 Ritual Monster from your hand, by Tributing monsters from your hand or field, including this card on your field, whose total Levels equal or exceed the Level of the Ritual Monster. You can only use this effect of "Megalith Hagith" once per turn.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. If this card is Ritual Summoned: You can draw 1 card, then discard 1 card. During the Main Phase (Quick Effect): You can activate this effect; Ritual Summon 1 Ritual Monster from your hand, by Tributing monsters from your hand or field, including this card on your field, whose total Levels equal or exceed the Level of the Ritual Monster. You can only use this effect of "Megalith Och" once per turn.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. If this card is Ritual Summoned: You can add 1 "Megalith" monster from your Deck to your hand, except "Megalith Ophiel". During your Main Phase: You can activate this effect; Ritual Summon 1 Ritual Monster from your hand, by Tributing monsters from your hand or field, including this card on your field, whose total Levels equal or exceed the Level of the Ritual Monster. You can only use this effect of "Megalith Ophiel" once per turn.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. You can discard this card; Ritual Summon 1 "Megalith" Ritual Monster from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. You can only use this effect of "Megalith Phaleg" once per turn. Monsters you control gain 300 ATK/DEF for each Ritual Monster in your GY.

Rock / Ritual / Effect

You can Ritual Summon this card with a "Megalith" card. If this card is Ritual Summoned: You can target 1 Ritual Monster in your GY; this card's Level becomes the Level of that target, then add that target to your hand. During the Main Phase (Quick Effect): You can activate this effect; Ritual Summon 1 "Megalith" Ritual Monster from your hand or Deck by Tributing monsters from your hand or field whose total Levels equal or exceed the Level of the Ritual Monster. You can only use each effect of "Megalith Phul" once per turn.

The first time each Ritual Summoned monster would be destroyed by battle each turn, it is not destroyed. If a "Megalith" monster is Special Summoned (except during the Damage Step): You can target 1 Ritual Monster in your GY; add it to your hand. You can only use this effect of "Megalith Portal" once per turn.

You can target 1 Level 4 or lower monster you control; its Level becomes double its original Level until the end of this turn (even if this card leaves the field). You can only use this effect of "Megalith Promotion" once per turn.

Activate 1 of these effects;

● All monsters your opponent controls lose 500 ATK for each Ritual Monster on the field, until the end of this turn.

● Ritual Summon 1 "Megalith" Ritual Monster from your Deck in Defense Position, by Tributing monsters from your hand or field whose total Levels equal exactly twice its Level.

Dinosaur

With its sound-baffling armor and gargantuan jaws, this primeval predator's phosphorescence was the only possible pardon for its primitive prey.

While your LP is lower than your opponent's, the equipped monster's ATK becomes double its original ATK. While your LP is higher, the equipped monster's ATK becomes half its original ATK.

Rock / Effect

This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play a Rock-Type monster(s) in your Graveyard. The original ATK and DEF of this card become the number of Rock-Type monsters you removed from play when you Special Summoned this card x 700.

You can target 1 other card you control; destroy it, and if you do, add 1 "roid" card from your Deck to your hand. During damage calculation, if your "roid" monster battles: You can send 1 "roid" monster from your Deck to the GY; switch the original ATK and DEF of your battling monster during the damage calculation only. You can only use each effect of "Megaroid City" once per turn. You cannot Special Summon monsters from the Extra Deck, except Fusion Monsters, the turn you activate either of this card's effects (even if this card leaves the field).

Machine

Made of mysterious metal, this monster is a doomsday machine from the edge of the universe.

Dinosaur

Nothing stands in the way of this spike-covered dinosaur!

Spellcaster / Effect

Each time a Spell Card is activated, place 1 Spell Counter on this card when that Spell resolves. During the End Phase: You can remove 3 Spell Counters from this card, then target 1 of your banished Spells; add 1 card with the target's name from your Deck to your hand. You can only use this effect of "Megistric Maginician" once per turn.

Spellcaster / Effect

You can Tribute this card, then target 1 face-up Continuous Spell/Trap on the field; destroy that target.