Lich

The Lich was once a powerful wizard or sorcerer in life. However, seeking a means for existence beyond the grave to continue his studies, the wizard concocts a potion, imbibes it, and becomes one of the Undead. In this unliving form, the Lich’s spellcasting abilities are greatly enhanced. As a result, the Lich is among one of the most feared of the Undead (along with the Vampire).