Cheapest priced copy (Avatar: The Last Airbender): $0.39 at Card Kingdom, near mint, their price list as of .
Enter the Avatar State 
Instant — Lesson · Uncommon · Avatar: The Last Airbender · #18
Until end of turn, target creature you control becomes an Avatar in addition to its other types and gains flying, first strike, lifelink, and hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.39 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender | 18 | Uncommon | $0.39 | $1.99 |