Eyevea Eyevea is an island located in the Abecean Sea , geographically in the northern part of the Summerset Isles . It was created by Arch - Mage Shalidor as a sanctuary for all mage s , and later traded to Sheogorath in a deal for the Folium Discognitum . History . In the early period of the First Era , Arch - Mage Shalidor created the island of Eyevea as a location usable by all mages on Nirn as a sanctuary or retreat to freely practice and study the art of Magic , among other purposes . The island ' s architecture was constructed using Altmer i designs . Later on , Shalidor traded Eyevea to the Daedric Prince of Madness , Sheogorath , in exchange for an artifact known as the Folium Discognitum : a tome of vast knowledge which Shalidor had been deeply interested in obtaining . From there , the island was transported to the Shivering Isles , Sheogorath ' s domain in Oblivion . It can be safely assumed that this resulted in mushroom trees growing on the island , and that the island was also affected by the Greymarch during the beginning of the Second Era following 1E 2920 . However , Shalidor began to feel disappointed in his decision and regretted making the deal with Sheogorath . He later began to believe that he had been tricked into receiving the lower end of the deal and was determined to regain the island . In 2E 583 , Shalidor was resurrected in a manner that his spirit could interact with the physical world while not appearing as a ghost or skeleton , and sought assistance from the Mages Guild . The Vestige would help Arch - Mage Shalidor and Valaste retrieve the island by completing four trials for Sheogorath . In return for completing each trial , they were given a tome which would supply info on how to summon Eyevea back into Mundus from Oblivion . However , the tomes were cursed to prevent Shalidor from reading them , so Valaste took the risk of reading the books , gradually causing her to temporarily go insane . Following the acquirement and decryption of each tome , Eyevea was successfully brought back into Mundus . Sheogorath however neglected to remove the Daedric minions , resulting in the final test being to purge them . The final enemy was Haskill , who had to be defeated in combat in order to gain full access to the island . The Vestige was later congratulated by Sheogorath for their work . Shalidor decided to grant the island ' s ownership to the Mages Guild , due to its assistance and his limited time left on Mundus . Portals were opened in every known guildhall across Tamriel leading to the island . Vanus Galerion installed a series of three rules in order to stop factions of the Alliance War from fighting on the island . Rules . The following are rules instituted by Vanus Galrion that apply to the island of Eyevea : Quests . The Mad God ' s Bargain . The Vestige must help Arch - Mage Shalidor take back the island of Eyevea from Sheogorath . Enemies such as Golden Saints , Dark Seducers , Scamps , and many other Daedra must be defeated . The final battle involves defeated Haskill , Sheogorath ' s right - hand man . The Arch - Mage ' s Boon . Receive the library of Eidetic Memory from Shalidor as a reward for returning Eyevea to its original location . Creatures . Passive creatures found after the completion of the Mages Guild questline : Enemies . The following only appear before the completion of the Mages Guild questline : Bosses : Facilities . Unique Crafting Sites , which can craft the following :