Froslass ex

If this Pokémon is in the Active Spot and is Knocked Out, flip a coin. If heads, your opponent takes 1 fewer Prize card.

This attack also does 20 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

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).

Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.