The Legendary Fisherman III

You can Special Summon this card (from your hand or Graveyard) by Tributing "The Legendary Fisherman". If Summoned this way: You can banish any number of monsters your opponent controls. During either player's turn, if your opponent would take effect damage: You can return all banished cards to the Graveyard; double that effect damage. While "Umi" is on the field, this card cannot be destroyed by [...]