The Bloodworm Helm is an evil trollbone helmet created by Mannimarco, the King of Worms. Although beautiful to behold, many find the artifact repulsive due to its necromantic nature. The helm grants the wearer greater skill at Conjuration, as well as the ability to turn the undead, drain the essence of enemies and summon a skeletal minion from the Soul Cairn. Mannimarco left the helm behind when he ascended to godhood during the Warp in the West.
By 3E 427 the helm had come into the possession of a Nord necromancer named Crazy Batou, who had established a lair in an ancestral tomb in the Molag Amur region of Vvardenfell. Batou was killed by the Nerevarine, who then sold the helm to Torasa Aram. Torasa put the helm on display in the Mournhold Museum of Artifacts. It was later obtained by the Mages Guild, and transported to the Arcane University in Cyrodiil for safekeeping.
In 3E 433, Mannimarco returned to the affairs of mortals and attempted to destroy the Mages Guild. The Council of Mages dissolved in the ensuing attacks on the guild, and Master-Wizard Irlav Jarol took the helm to the abandoned Fort Teleman in Blackwood with a group of researchers to study the artifact in an effort to better understand how Mannimarco could be stopped. The expedition went against the advice of Arch-Mage Hannibal Traven, who feared for the group's safety. Traven was proven correct when Irlav's experiments resulted in the summoning of many dangerous Daedra; Irlav himself was slain by a hostile Dremora. The Order of the Black Worm then launched an assault on Fort Teleman to recover the artifact for Mannimarco, but they were held at bay by the Daedra. A member of the Mages Guild was sent by Traven to recover the helm, and stumbled into the ongoing battle. The mage successfully infiltrated the ruins and took the helm from Irlav's corpse. It was then brought back to the University and returned to a secure place in the Arch-Mage's Tower.
- Torasa Aram's dialogue in Tribunal
- Events of Morrowind
- Events of Tribunal
- Events of Oblivion