Jet, Freedom Fighter is a uncommon Legendary Creature — Human Rebel Ally card from Avatar: The Last Airbender (TLA), collector number 229. Current market price: $0.12 (foil $0.30), TCGplayer market prices via Scryfall.
When Jet enters, he deals damage equal to the number of creatures you control to target creature an opponent controls. When Jet dies, put a +1/+1 counter on each of up to two target creatures.