Board Thread:Lore Discussion/@comment-95.94.124.138-20130922100323/@comment-68.2.107.202-20141008041722

At some point in the questline, Paarthurnax regards the Dragonborn not as Nord/human/beast/elf/, but as a Dragon. Not even half-mortal, half-Dragon, but full-blown Dragon. Tsun (the giant Nord guardian at the bridge) informs the Dragonborn that a living being cannot stay long in Sovngarde, and recommends that the Dragonborn leaves, soon after Alduin is defeated in Sovngarde. To me, this implies he's witnessed living beings try to stay in Sovngarde and suffer for it. Perhaps necromancers or Dragonborn (especially those who have succumbed to the lust for power, as Arngeir has mentioned) that precede the Last Dragonborn have done this. Therefore, from the events of Skyrim we can safely state that (at least during Alduin's reign, when he controlled the one corporeal entrance to Sovngarde) only Dragons, mortals of Dragon blood, Nord dead, and (potentially?) mortals who have secretly explored the mysteries of Aetherius can enter Sovngarde. And the Ebony Warrior doesn't look like he knows how to get there.