Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing 1 'The Legendary Fisherman', and cannot be Special Summoned by other ways. When this card is Special Summoned: You can banish all monsters your opponent controls, but this card cannot attack this turn. Cannot be destroyed by battle or card effects, and is unaffected by Spell/Trap effects. Once per turn: You can return all of your opponent's banished cards to the Graveyard, and if you do, double the next battle or effect damage your opponent would take this turn.