Unflinching Courage is a uncommon Enchantment — Aura card from Battlebond (BBD), collector number 230. Current market price: $0.36 (foil $0.55), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2 and has trample and lifelink. (Damage dealt by the creature also causes its controller to gain that much life.)