Does 10 damage plus 10 more damage for each Energy card attached to the Defending Pokémon.
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.
“A scientist created this Pokémon after years of horrific gene-splicing and DNA engineering experiments.”
How much is Mewtwo #10/130 worth?
Mewtwo #10/130 is a Rare Holo card from Base Set 2 (2000) — today it trades at roughly $157.67 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $5,089.71, roughly 32.3x the raw price, while a PSA 9 sits near $250.00. 4,419 copies have been graded to date, and 2% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.