Healing nectar. Used in Alchemy.
Healing nectar is an ancient food for the gods. One day, they threw it out from their palace up in the sky due to the creation of the Elixir of Life. Humans found it, and from that point, they use it in alchemy. Chemists have figured out how to replicate it. They have also used its special properties to create health potions, a creation of glass and healing nectar. From deflation in modern day, a certain store sells it very cheap for around 5 gold, but nectar is still a vital ingredient in the alchemy for the health potions.