The Elixir of Life refers to a legendary magical potion made with elf blood, contained within the Eternity Pendant. The blood has to be 100% pure for the spell to work. If the Pendant is filled with pure elf blood, it will grant immortality to whomever wears it. If the wearer is already dead, the Pendant will reanimate their body back to life. If filled with blood of a half elf such as Elfo the pendant is capable of healing the wearer but the effects are temporary. An example being the pendant ridding Guysbert of his headache but didn't heal the stab wound in his head and ultimately died seconds later.