Lich

Higher ranking Necromancers (the priests of the Spider Goddess) are given a life-prolonging elixir that is "milked from the venom of the Goddess's sacred spiders, and that they must mix with their food.

This "treatment" turns them into Asakkus, or "Liches", their bodies desiccated but now freed from the passions of the flesh. They keep aging however, until they look little more than walking mummies… The venom mixture also colors their whole eyes bright green.