You can only use either this card name’s (1) or (2) effect per turn, and only once that turn.
(1) Target 1 WATER Xyz Monster you control; detach 1 material from it, and if you do inflict damage to your opponent equal to the number of cards in your hand x 400, and if you do that, the monster gains ATK equal to the amount of damage this effect dealt.
(2) You can banish this card and 1 WATER Xyz Monster from your GY; draw 2 cards.