Found at the top of the College of Winterhold. It is in Shalidor's cache below a statue. With the mod Immersive College of Winterhold installed, it is instead found on the roof of the College of Winterhold tower, accessible through the Archmage's Quarters.
- 2 Stalhrim
- The Korthor, Haldriin and Vosis masks are notable for not having a corresponding dragon priest in The Elder Scrolls V: Skyrim. Korthor, Haldriin and Vosis are introduced in The Elder Scrolls Online.
- Korthor is fought as a part of the mage's Guild questline in ESO. He is found in the ruins of Vuldngrav, located in an unknown part of Skyrim. He is called a "friend" by Sheogorath and must be slain to complete the quest.