Courageous Resolve is a rare Instant card from Tales of Middle-earth Commander (LTC), collector number 506. Current market price: $0.72 (foil $0.48), TCGplayer market prices via Scryfall.
Up to one target creature you control gains protection from each of your opponents until end of turn. Draw a card. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.) Fateful hour — If you have 5 or less life, you can't lose life this turn, you can't lose the game this turn, and your opponents can't win the game this turn.