Board Thread:Lore Discussion/@comment-121.217.164.118-20130929050443/@comment-3573184-20131002021741

Greenerseyes wrote: I thought they were talking about looking in the Oblivion Realms, not Aetherius. To my knowledge door ways to Aetherius are much rarer than Oblivion making it unlikely that they look there Vivec has CHIM, and is all powerful, he can go to Atherius if he wants to, and in his dialog he says ALL realms, not just the Oblivion realms.

And Yagrum was a Dwemer, who could easily pass into the outer realms, and return, on his own power. Going to Atherius would be laughably trivial for him.