Shedinja

AbilityVessel of Life

Once during your turn (before your attack), you may discard all cards attached to this Pokémon and attach it to 1 of your Pokémon as a Pokémon Tool card. When the Pokémon this card is attached to is Knocked Out, your opponent takes 1 fewer Prize card.

Put 3 damage counters on your opponent's Active Pokémon.