Momo, Friendly Flier is a rare Legendary Creature — Lemur Bat Ally card from Avatar: The Last Airbender (TLA), collector number 317. Current market price: $2.17 (foil $2.55), TCGplayer market prices via Scryfall.
Flying The first non-Lemur creature spell with flying you cast during each of your turns costs {1} less to cast. Whenever another creature you control with flying enters, Momo gets +1/+1 until end of turn.