Tri-Edge Levia

3 Level 3 monsters Banish any monster destroyed by battle with this card. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster on the field; it loses 800 ATK, also its effects are negated. These changes last until the end of this turn.

Sea Serpent WATER XYZ Monster 3 xyz