Morgus
a.k.a. maleficum, veneficius, liche, death caster.
Casters spend a lifetime achieving their communion with the Anima on Lume, and this connection does not end with their death. In undeath they retain their abilities, as well as fragmented memories and shades of their former personality. This makes these Undead Casters both unpredictable and unstable. They are servile to their Caster, for a time. A Morgus will continue to learn during undeath, and can become exponentially more powerful Casters than they were in their lifetime.
Their physiology resembles that of a Clinker, though their magical traits vary. Records depict them garbed in tattered robes, punctuated with occult artifacts, wielding rotting staffs and rusted long swords. They may be larger than Folk in stature, possibly due to having other bones grafted to them. Sources are unclear on this. Most distressing among the records are those Revenants schooled in necrocasting. Infamously fiendish beings, they may raise and control their own Undead serfs, able to convert defeated foes, or happles bystanders, into loyal troops. Since the Liche Liege, Casters have carefully monitored, and quickly silenced, any necrocaster whose studies wander down this disastrous path.
Morgus have few vulnerabilities, both magically and physically. It is their mental state that is most fragile, as their tendency towards introspection sets them apart from the more practical, grounded Skullcaps. For long, sleepless years, Morgus contemplate their existence and motivations, all the while mocked by visions of the simple pleasures of a mortal life. Emotions and memories all weigh against this ruminative Undead. Despite their accumulated powers and the bastion of psychological callouses they develop, their lingering humanity and unstable sanity can be used against them.
The Continent has only recently recovered from the last plague of Undead. Countless species were wiped from existence, not to mention the many Folk who hadn't the time, ability or opportunity to flee. If it wasn't for their own mindlessness, and failed leadership, all the Races would be shambling husks of their former selves.