Cheapest priced copy (Avatar: The Last Airbender): $0.35 at Card Kingdom, near mint, their price list as of .
Razor Rings 
Instant · Common · Avatar: The Last Airbender Eternal · #272
Razor Rings deals 4 damage to target attacking or blocking creature. You gain life equal to the excess damage dealt this way.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender | 33 | Common | $0.35 | $0.49 |
| Avatar: The Last Airbender Eternal | 272 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 2 October 2025Excess damage has been dealt to a creature if the damage dealt to it is greater than lethal damage. Usually, this means damage greater than its toughness, although damage already marked on the creature is taken into account.