Coral Golem

[1/turn], You can banish 1 WATER or Sea Monster from your GY and target 1 card on the field; attach it to 1 Rank 8 WATER monster you control as a Xyz Material. If this monster is sent to the GY by a card effect while "Umi" is face-up in your field card zone, you can Special Summon 2 WATER monsters, 2 Sea Monsters, or 1 WATER and 1 Sea Monster from your deck in DEF, except Coral Golem. Destroyed them during the end of this turn. You can only use this effect of Coral Golem [1/turn].