Mead of Idun

Mead of Idun, Mead of Life, Brew of Immortality, and Aesirwater are just some of the names of this storied substance. According to the legend, Idun makes this honey-golden potion from the apples that grow in Valhalla, and only bequeathes it to mortals who have done the Aesir a great service.

When you drink this potion, you will remain your current age forever, and you become immune to all diseases. You still need to eat, drink, and breathe, but old age cannot kill you.