Diaochan, Artful Beauty is a mythic Legendary Creature — Human Advisor card from Avatar: The Last Airbender Eternal (TLE), collector number 27. Current market price: $1.78 (foil $3.07), TCGplayer market prices via Scryfall.
{T}: Destroy target creature of your choice, then destroy target creature of an opponent's choice. Activate only during your turn, before attackers are declared.