Swimming from the Abyss

Add 1 "Number C32: Shark Drake Veiss" and 1 "Number 32: Shark Drake" to your Extra Deck at the beginning of the Duel. In addition, once per turn, you can remove 2 Xyz Materials from a Rank 4 Sea Serpent -Type Xyz Monster on your field and make your Life Points 1000. If you Xyz Summon "Number 32: Shark Drake" during this turn, you can also Xyz Summon it by using that Xyz Monster as its material. This Skill can only be used/applied if you begin the Duel with a Deck (excluding Extra Deck) that contains no monsters other than at least 10 Level 4 or lower WATER monsters.