Liches

A unique form of undead in that it is the only one able to use magic outside the necromancy school, except for demonhosts. Different from other forms of undead, a lich is not raised from a dead body but must be created from the mage casting the spell. It is the ultimate goal of many a necromancer but the process is very dangerous and unless the effect is made permanent the caster must keep the spell alive indefinitely or have his or her soul destroyed when the spell ends. Such creatures are called demiliches, although usually long-lived, are not considered true liches and are not as powerful as much of their spell power is required to uphold the spell which fuels their transformation. A true lich is an epic opponent, but they are slightly more vulnerable the first years after their creation before they have regained their full power from casting the spell.

Liches do not gain fatigue from casting spells and can therefore cast them indefinitely.

Liches are very rare and rightly feared by civilized society. Necromancers found actively engaged in the process of turning themselves into liches are usually punished with the most gruesome methods available.

Alchemy
The remains of a lich can be used as best quality alchemical ingredients.