Daybreak Coronet is a rare Enchantment — Aura card from Future Sight (FUT), collector number 21. Current market price: $5.39 (foil $30.55), TCGplayer market prices via Scryfall.
Enchant creature with another Aura attached to it Enchanted creature gets +3/+3 and has first strike, vigilance, and lifelink. (Damage dealt by the creature also causes its controller to gain that much life.)