This attack does 30 more damage for each damage counter on each of your Benched Magikarp.
100+Thrash
Flip a coin. If heads, this attack does 30 more damage. If tails, this Pokémon does 30 damage to itself.
“Rarely seen in the wild. Huge and vicious, it is capable of destroying entire cities in a rage.”
How much is Gyarados #21/98 worth?
As of November 5, 2026, Gyarados #21/98 from Ancient Origins sells for around $65.56 in raw, ungraded condition. Across the 2 printings we track, copies run anywhere from $34.99 to $958.70 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $3,604.31, roughly 55.0x the raw price, while a PSA 9 sits near $650.00. 609 copies have been graded to date, and 7% 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.