Head Bad Cachalot

[ Sea Serpent / Effect ] [REQUIREMENT]Send the top card of your Deck to the Graveyard. [EFFECT] 1 face-up monster on your opponent's field loses 500 ATK until the end of this turn. Then, if you have "Umi" or "Big Umi" face-up on your field, inflict 500 damage to your opponent. ATK/ 2500 DEF/ 1200