Set: Base (10/102)
Rarity: Rare Holofoil
Retreat: 3 Energy
Does 10 damage plus 10 more damage for each Energy card attached to the Defending Pokémon. 10+
Discard 1 Psychic Energy card attached to Mewtwo in order to use this attack. During your opponent's next turn, prevent all effects of attack, including damage, done to Mewtwo.
Seems like we know more about this... 'thing'!