Mewtwo - 51/108 (Prerelease) [Staff] (51) [XY Promos] Holofoil Condition:Lightly Played you may put 6 damage

you may put 6 damage counters on your opponent's Pokémon-GX and Pokémon-EX in any way you like

If that Pokémon is a Stage 2 Evolved Pokémon

Colorless Sand Attack If the Defending Pokémon tries to attack during your opponent's next turn

EX - Evolves from Metagross-EX

Mewtwo - 51/108 (Prerelease) [Staff] (51) [XY Promos] Holofoil Condition:Lightly Played you may put 6 damageRarityPromo Hit Points130 HP Colorless,Colorless Psychic (20+) This attack does 20 more damage for each Energy card attached to your opponent's Active Pokemon. Psychic,Psychic Barrier During your opponent's next turn, prevents all effects of attacks, including damage, done to this Pokemon. If 1 of your Pokemon used Barrier during your last turn, this attack can't be used. Weakness Psychic 2 Resistance None None