You can Ritual Summon this card with any "Gishki" Ritual Spell. If this card is Ritual Summoned: You can target 1 WATER monster in your GY; Special Summon it. Cannot be destroyed by battle with a monster Special Summoned from the Extra Deck. Once per turn, when your opponent activates a monster effect (Quick Effect): You can return 1 "Gishki" Ritual Monster you control to the hand, and if you do, negate the activation, and if you do that, shuffle that card into the Deck.