Teshar, Ancestor's Apostle is a rare Legendary Creature — Bird Cleric card from The Brothers' War Commander (BRC), collector number 77. Current market price: $0.39, TCGplayer market prices via Scryfall.
Flying Whenever you cast a historic spell, return target creature card with mana value 3 or less from your graveyard to the battlefield. (Artifacts, legendaries, and Sagas are historic.)