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.
Near Mint Unlimited - $0.30
Near Mint 1st Edition - $0.20
Lightly Played Unlimited - $0.20
Lightly Played 1st Edition - $0.20
Moderately Played Unlimited - $0.20
Moderately Played 1st Edition - $0.20
Played Unlimited - $0.20
Played 1st Edition - $0.20