Aang and Katara is a rare Legendary Creature — Human Avatar Ally card from Avatar: The Last Airbender Eternal (TLE), collector number 69. Current market price: $7.13 (foil $5.75), TCGplayer market prices via Scryfall.
Whenever Aang and Katara enter or attack, create X 1/1 white Ally creature tokens, where X is the number of tapped artifacts and/or creatures you control.