Cataclysmic Circumpolar Chilblainia

If a face-up WATER monster(s) you control is destroyed by battle or an opponent's card effect: You can Special Summon this card from your hand, then you can send 1 random card from your opponent's hand to the GY. You can only use this effect of "Cataclysmic Circumpolar Chilblainia" once per turn.