How big are the Shivering Isles? According to Nelson, Sheogorath's madcap realm adds roughly a quarter more real estate via its own pinched-off plane. "The realm of Oblivion comprises many different planes of existence—each of the Daedric Princes has his own," Nelson explains. "In Oblivion, the player was only able to explore one (Mehrunes Dagon's plane). The Shivering Isles is another plane belonging to Sheogorath." But where Dagon's plane was fragmented and often randomly generated, Sheogorath's Shivering Isles is one contiguous land mass. "It's a completely new world, with settlements, a major city (New Sheoth), large regions of wilderness, and many residents."