Fire Lord Zuko is a rare Legendary Creature — Human Noble Ally card from Avatar: The Last Airbender (TLA), collector number 360. Current market price: — (foil $537.44), TCGplayer market prices via Scryfall.
Firebending X, where X is Fire Lord Zuko's power. (Whenever this creature attacks, add X {R}. This mana lasts until end of combat.) Whenever you cast a spell from exile and whenever a permanent you control enters from exile, put a +1/+1 counter on each creature you control.