Dinomist Plesios Common / Short Print - Breakers of Shadow Unlimited

Pendulum Effect: Once, while this card is in your Pendulum Zone, you can negate an activated card effect that targets another "Dinomist" card(s) you control, then destroy this card.
Monster Effect: All face-up monsters your opponent controls lose 100 ATK and DEF for each "Dinomist" card you control.