Poké-POWER Psy Shadow
Once during your turn (before your attack), you may search your deck for a Psychic Energy card and attach it to 1 of your Pokémon. Put 2 damage counters on that Pokémon. Shuffle your deck afterward. This power can't be used if Gardevoir is affected by a Special Condition.
Does 10 damage times the total amount of Energy attached to Gardevoir and the Defending Pokémon.