Unflinching Courage is a uncommon Enchantment — Aura card from Dragon's Maze (DGM), collector number 111. Current market price: $0.15 (foil $1.06), 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.)