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Eternal slumber was once taken for granted. But now, necromancy has appeared in numerous locations across Tamriel. Anonymous spies have pinpointed the Cult of the Black Worm as the insidious force responsible. This sect, once hidden from view, is spreading, and offers the weak-willed what seems a guaranteed rise to power. Its chief opposition is the Mages Guild, but with the Guild in disgrace in Cyrodiil and banished from the Imperial City, the Order of the Black Worm seems ascendant.
Hidden cells of these necromancers are called Worm Nests, led by a priest of undeath who takes the mantle of Worm Anchorite. Such priests may even have converted to undead form, after which they're called Worm Eremites. They are never apart from undead protectors, either summoned or reanimated. The leader of this cult is the Altmer mage Mannimarco, whose name is never spoken aloud by the cultists; he is instead invoked (with a whisper) as the King of Worms. No more must be written about him; his tendrils of power and influence snake far and wide.