In an effort to stave of full death, some Sorcerers will transform themselves into an undead Nadheru. Their minds and bodies are preserved, but held together with magic. They no longer require food or water, but they can not travel too far from their sanctum (the place where they were transformed). If their sanctum is destroyed, so are they. Their personalities do not change when they transform, they are still the same person. Other more mindless undead seem to be attracted to them, and a Nadheru can command them. The Vigil considers the Molichi abominations and will destroy them on sight.