Zuko, Firebending Master is a mythic Legendary Creature — Human Noble Ally card from Avatar: The Last Airbender Eternal (TLE), collector number 127. Current market price: $10.19 (foil $11.21), TCGplayer market prices via Scryfall.
First strike Firebending X, where X is the number of experience counters you have. (Whenever this creature attacks, add X {R}. This mana lasts until end of combat.) Whenever you cast a spell during combat, you get an experience counter.