Mewtwo (10/102) [Base Set Shadowless] 1st Edition Holofoil - Holo Rare

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

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

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