The Blue Spirit is a rare Legendary Creature — Human Rogue Ally card from Avatar: The Last Airbender Eternal (TLE), collector number 178. Current market price: $3.42 (foil $3.20), TCGplayer market prices via Scryfall.
You may cast the first creature spell you cast each turn as though it had flash. Whenever a nontoken creature you control enters during combat, draw a card.