M Gengar-EX (PHF 35)
Phantom Gate
Choose 1 of your opponent's Pokémon's attacks and use it as this attack.
When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends.
Choose 1 of your opponent's Pokémon's attacks and use it as this attack.
When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends.