Jeong Jeong, the Deserter is a uncommon Legendary Creature — Human Rebel Ally card from Avatar: The Last Airbender (TLA), collector number 142. Current market price: $0.16 (foil $0.29), TCGplayer market prices via Scryfall.
Firebending 1 (Whenever this creature attacks, add {R}. This mana lasts until end of combat.) Exhaust — {3}: Put a +1/+1 counter on Jeong Jeong. When you next cast a Lesson spell this turn, copy it and you may choose new targets for the copy. (Activate each exhaust ability only once.)