Dinomist Plesios - BOSH-EN025 Common 1st Edition

[ 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.