Saving Grace is a uncommon Enchantment — Aura card from Hour of Devastation (HOU), collector number 21. Current market price: $0.36 (foil $3.59), TCGplayer market prices via Scryfall.
Flash Enchant creature you control When this Aura enters, all damage that would be dealt this turn to you and permanents you control is dealt to enchanted creature instead. Enchanted creature gets +0/+3.