Hero of the Nyxborn is a uncommon Enchantment Creature — Human Soldier card from Theros Beyond Death (THB), collector number 219. Current market price: $0.12 (foil $0.30), TCGplayer market prices via Scryfall.
When this creature enters, create a 1/1 white Human Soldier creature token. Whenever you cast a spell that targets this creature, creatures you control get +1/+0 until end of turn.