Dinomist Brachion

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

If you do not control "Dinomist Brachion" in your Monster Zone and your opponent controls a monster that has the highest ATK on the field (even if it's tied), you can Special Summon this card (from your hand).