Cheapest priced copy (Avatar: The Last Airbender): $2.99 at Card Kingdom, near mint, their price list as of .
United Front 
Sorcery · Mythic · Avatar: The Last Airbender · #39
Create X 1/1 white Ally creature tokens, then put a +1/+1 counter on each creature you control.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $2.49 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Promos | 39s | Mythic | — | $17.99 |
| Avatar: The Last Airbender | 39 | Mythic | $2.99 | $2.49 |
| Avatar: The Last Airbender | 331 | Mythic | $4.99 | $7.99 |