Sabrina's Gengar - 014/132 - Unlimited Holofoil Gym Heroes - Holo Rare

Put a damage counter on each of your opponent's Pokémon has already has any damage counters on it.

Unless this attack Knocks Out the Defending Pokémon, flip 2 coins. If both of them are heads, your opponent shuffles his or her Active Pokémon and all cards attached to it into his or her deck.