Serra Paragon is a mythic Creature — Angel card from Dominaria United Promos (PDMU), collector number 32p. Current market price: $4.29 (foil $6.22), TCGplayer market prices via Scryfall.
Flying Once during each of your turns, you may play a land from your graveyard or cast a permanent spell with mana value 3 or less from your graveyard. If you do, it gains "When this permanent is put into a graveyard from the battlefield, exile it and you gain 2 life."