(1) Once per turn, when your opponent activates a card or effect that targets 1 “Bystial” monster you control (and no other cards), or they activate a card or effect in response to the activation your “Bystial” monster’s effect: You can target 1 LIGHT or DARK monster in the GY; banish it, and if you do, negate that activated effect.
Atom 1.0
