Ancestors' Grace is a Legendary amulet in Diablo III. It requires character level 31 to drop, and only drops for Hardcore players, for whom it has some value. It is the only item in game that can be actually lost. Prior to patch 2.1, it could also have the Movement Speed bonus, which is normally not allowed on an amulet. The unique affix is only triggered when all other life-saving effects (skills and others) fail. Remember that once it saves the character, they will be left severely weakened due to having no amulet equipped.