2 Level 8 monsters
During either player s turn: You can banish 1 random face-down monster from your opponent s Extra Deck, face-up, and if you do, this card s ATK becomes equal to the banished monster s. During either player s turn: You can detach 1 Xyz Material from this card, then target 1 of your opponent s banished Fusion, Synchro, or Xyz Monsters; return it to the Extra Deck, and if you do, destroy 1 monster your opponent controls with the same monster card type (Fusion, Synchro, or Xyz). You can only use each effect of Aegaion the Sea Castrum once per turn.