Abyss-scale of the Kraken
Ⓒ Equip only to a "Mermail" monster.
① A monster equipped with this card gains 400 ATK.
② If a Monster Effect that was activated on your opponent's side of the field resolves, negate that effect, then send this card to the GY.
The effect that negates effects does not start a chain. When the opponent activates a Monster effect, at the time that effect will resolve, the effect of this card is applied immediately.