Cheapest priced copy (Avatar: The Last Airbender): $1.79 at Card Kingdom, near mint, their price list as of .
Bender's Waterskin 
Artifact · Common · Avatar: The Last Airbender · #255
Untap this artifact during each other player's untap step.
{T}: Add one mana of any color.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $1.79 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender | 255 | Common | $1.79 | $4.99 |
2 rulings from Wizards of the Coast
- 2 October 2025Bender's Waterskin untaps at the same time as the active player's permanents. You can't choose to not untap it at that time.
- 2 October 2025Some effects state that an artifact doesn't untap during its controller's untap step. These effects won't apply and stop Bender's Waterskin from untapping during another player's untap step.