Leviathan, Lord of the Whorl [Opus XIV: Crystal Abyss]

When Leviathan, Lord of the Whorl enters the field, choose up to 1 Forward opponent controls, up to 1 Backup opponent controls and up to 1 Monster opponent controls. Return them to their owners' hands.
When a Character is returned from the field to its owner's hand, choose 1 Forward opponent controls. It loses 9000 power until the end of the turn.