I find this funny because something related to this just happened to me. Is The Dragonborn, Talos, Ysmir, Shezzarines? Who, or what, is Talos? Let me hear the opinions, let the verbal slaughter begin. Arctus be both the Underking, who you face in Sancre Tor, and part of Talos? Or how could Wulfarth, who was slain for the last time before Talos mantled the Heart? How is the Dragonborn not Talos, he walked the way Tiber and Ysmir did. Wulfarth was already a ghost inhabiting a golem of ashes, and Arctus was killed by Wulfarth prior to Mantling. If Wulfarth possessed the body of Zurin Arctus, turning him into the Underking, how was he part of the Talos entity? If either of these are the case, than the only individual who could be Talos, is Tiber Septim himself. If Zurin had, as the books proclaimed, become the Underking, how was he a part of Talos. In both Daggerfall (which I never fully completed due to having gotten lost in a dungeon for a quest, I have seen LPs), and Oblivion, you encounter the Underking. How, you may ask? Simple, in game events debunk it. The book, The Arcturian Heresy, is all lies.

The underking elder scrolls