User with this ability either is or can transform into a Lich, undead being resulting of a powerful being such as archmage, hierophant, priest-king, etc., striving for eternal life undergoes an arcane transformation to assure eternal life, binding their intellect to their animated corpse and thereby achieve a form of immortality. Liches are usually cadaverous, their bodies desiccated or even completely skeletal. They are often depicted as holding power over hordes of lesser undead creatures, using them as soldiers and servants.
Some variations of lich are distinguished from other undead by their phylactery - an item of the Lich's choosing into which they imbue their soul, giving them immortality until the phylactery is destroyed.
The Witch of Decay, Lubella (Momodora), is a horned giantess who wants to take over the throne of Karst.
The Horned King (The Chronicles of Prydain/The Black Cauldron)
The Diabolical, Lich (Adventure Time) is among the most frightening and unforgivable of Finn's enemies.
Ainz Ooal Gown/Momonga (Overlord) the guildmaster of Ainz Ooal Gown, Overlord of the Great Tomb of Nazarick.
Due to supernatural but eldritch forces, the physically deceased women had been reanimated into Fork Maidens (New Blood Interactive's DUSK), magical Zombies that brandish Dark Magic on their person, therefore also allowing them to project magic bolts. In addition to being reanimated, the Fork Maidens all have altered appearances, giving them hollow eyes and sharp teeth, earning them a horrific presence coupled with their disturbing remarks when confronting an adversary.
Mannimarco (Elder Scrolls)
The Night King (Game of Thrones) is an undead user of magic, using necromancy to raise undead armies and can interact and mark greenseers to know where they are.
Rasputin (Don Bluth’s Anastasia) sold his soul to the otherworldly forces of darkness in exchange for an unholy amulet, which in the process he became a lich. This is a type of undead creature with magical powers.
Ossion the Dread (Heroes of Camelot)
Nagash (Warhammer Fantasy) Great Necromancer, the Great Betrayer, the Usurper, the Undying King, the Supreme Lord of Undeath or simply He Who Shall Not Be Named.
Abracadaver (Powerpuff Girls) is a Zombie of mystical power.
Pious Augustus (Eternal Darkness) was a Roman centurion who was transformed into a lich by the artifact of the Ancient he chose, granting him tremendous power and the ability to cast the eldritch magic of the Ancient he serves, as well as Mantorok's.