Tale of Momo is a rare Sorcery card from Avatar: The Last Airbender Eternal (TLE), collector number 176. Current market price: $0.99 (foil $0.89), TCGplayer market prices via Scryfall.
This spell costs {2} less to cast if a creature left the battlefield under your control this turn. Search your library and/or graveyard for an Ally creature card, reveal it, and put it into your hand. If you search your library this way, shuffle.