Meowscarada ex (SV Black Star Promos 078)
Ability Bouquet Magic

You must discard a Basic Grass Energy card from your hand in order to use this Ability. Once during your turn, you may put 3 damage counters on 1 of your opponent's Benched Pokémon.

Colorless Colorless
Scratching Nails

If your opponent's Active Pokémon already has any damage counters on it, this attack does 120 more damage.

Card rule

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