Monk Gyatso is a rare Legendary Creature — Human Monk card from Avatar: The Last Airbender Eternal (TLE), collector number 173. Current market price: $7.56 (foil $8.23), TCGplayer market prices via Scryfall.
Whenever another creature you control becomes the target of a spell or ability, you may airbend that creature. (Exile it. While it's exiled, its owner may cast it for {2} rather than its mana cost.)