Immortality is a branch of Dark Magic which makes the wizard unable to die. This can only be accomplished through the creation of an Immortality Stone. Samuel Petrellico was known to own 4 of these stones, therefore making him ugly and pale.
It is known that every time you become a step closer to more immortal, you grow more like the appearance of Mirumorz.
- Thomas Joshman and the Stone of Immortality (First appearance)