Must first be either Fusion Summoned, or Special Summoned (from your Extra Deck) in Defense Position by Tributing 3 monsters with different Types. You can only Special Summon “Nerva the Imprisoned Deity of Creation” once per turn.
(1) Cannot be destroyed by card effects while there is a card in the Field Zone.
(2) Once per turn, when you activate an “Artmegia” monster’s effect (Quick Effect): You can make that effect become “Destroy all cards your opponent controls”.
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