We have no guide price to show for this card - either it trades too rarely to track, or our sources cannot price it right now. The live listings below are the best market signal.
Look at your opponent's hand and choose a number of Pokémon you find there up to the number of Psychic Energy attached to Gengar. Put the Pokémon you chose in the Lost Zone.
Put 4 damage counters on your opponent's Pokémon in any way you like.