Jet, Rebel Leader is a rare Legendary Creature — Human Rebel Ally card from Avatar: The Last Airbender Eternal (TLE), collector number 78. Current market price: $0.23 (foil $2.12), TCGplayer market prices via Scryfall.
Whenever Jet attacks, look at the top five cards of your library. You may put a creature card with mana value 3 or less from among them onto the battlefield tapped and attacking. Put the rest on the bottom of your library in a random order.