Aang, the Last Airbender is a uncommon Legendary Creature — Human Avatar Ally card from Avatar: The Last Airbender (TLA), collector number 4. Current market price: $0.24 (foil $0.32), TCGplayer market prices via Scryfall.
Flying When Aang enters, airbend up to one other target nonland permanent. (Exile it. While it's exiled, its owner may cast it for {2} rather than its mana cost.) Whenever you cast a Lesson spell, Aang gains lifelink until end of turn.