Begin the Duel with 1 "Xyz Revive Splash" placed in the Graveyard. During this Duel, you cannot use Rank 4 or above Xyz Monsters as material for an Xyz Summon except for WATER "Number" monsters. In addition, the following effect can be used once per Duel by paying Life Points to make your Life Points equal 1000. During this turn, monsters you control that have "Number 32: Shark Drake" as Xyz Material can inflict double damage. This Skill can only be used/applied if you begin the Duel with a Deck (excluding Extra Deck) that containers at least 7 Fish-Type monsters.