Cheapest priced copy (Avatar: The Last Airbender Eternal): $0.35 at Card Kingdom, near mint, their price list as of .
Unagi's Spray 
Instant · Common · Avatar: The Last Airbender Eternal · #97
Target creature gets -4/-0 until end of turn. If you control a Fish, Octopus, Otter, Seal, Serpent, or Whale, draw a card.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Eternal | 97 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 2 October 2025Unagi's Spray checks if you control a Fish, Octopus, Otter, Seal, Serpent, or Whale when it resolves, not when it is cast.
- 2 October 2025If the targeted creature becomes an illegal target before Unagi's Spray resolves (perhaps because it left the battlefield), the spell will not resolve.