Abyss Dweller

Xyz/Effect Monster · Sea Serpent · WATER · ★4

ATK 1700/DEF 1400

“2 Level 4 monsters While this card has an Xyz Material attached that was originally WATER, all WATER monsters you control gain 500 ATK. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, any card effects that activate in your opponent's Graveyard cannot be activated this turn.”