At first glance, the Tall Man might not seem all that monstrous at all. After all, he's just an unnaturally tall mortician with a penchant for processing human corpses into undead slave labor.
Live and let live, right?
But the Tall Man - or at least the entity that assumed the guise of Jebediah Morningside - is quite extraterrestrial and inhuman in origin. Think of him as the royal center of an undead colony or hive. Learn more right here.