» Sat Aug 28, 2010 3:53 pm
What I figure is that the Mantella Crux is not actually in the Aetherius, but rather at the very edge; the Mantella itself was the only thing actually inside the Aetherius, with the Crux being the last leg of the journey to Aetherius. I figure Sheogorath can get to the edge, as well.
Now, as to WHY (as opposed to how), I'm really not sure. I'm tempted to call it an author-insertion.