Valkyrie Harbinger is a rare Creature — Angel Cleric card from Kaldheim (KHM), collector number 374. Current market price: $5.65, TCGplayer market prices via Scryfall.
Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying and vigilance.