Darkrai (4) Reverse Holofoil - Great Encounters

You may have your opponent switch the Defending Pokémon with 1 or his or her Benched Pokémon.

If the Defending Pokémon is Asleep, this attack does 40 damage plus 40 more damage. If the Defending Pokémon is not Asleep, that Pokémon is now Asleep.