Cornerstone Mask Ogerpon ex – Twilight Masquerade – 112/167

Ability: Cornerstone Stance — Prevent all damage from attacks done to this Pokémon by your opponent's Pokémon that have an Ability.

Attack: Demolish (140) — This attack's damage isn't affected by Weakness or Resistance, or by any effects on your opponent's Active Pokémon.

As long as this Pokémon is on your Bench, prevent all damage done to this Pokémon by attacks (both yours and your opponent's).
Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.
Tera: As long as this Pokémon is on your Bench, prevent all damage done to this Pokémon by attacks (both yours and your opponent's).