Mewtwo (Base Set 2 10/130)
0
Psychic Psychic
Barrier

Discard 1 Psychic Energy card attached to Mewtwo in order to use this attack. During your opponent's next turn, prevent all effects of attacks, including damage, done to Mewtwo.

Psychic Colorless
Psychic
10+

Does 10 damage plus 10 more damage for each Energy card attached to the Defending Pokémon.