CarlManvers2019
Writers Blocked Douchebag
Aetherius
Aetherius, or the Immortal Plane, is the realm from which Aedra such as the Nine Divines originate. Aetherius is the source of magic and of all creation in Mundus. It can be construed as the inverse of Oblivion, from which the Daedra originate; conversely, Aetherius is the realm from which the...
elderscrolls.fandom.com
Oblivion (Realm)
For other uses, see Oblivion. Oblivion (also called the Void of Oblivion, the Planes of Oblivion, the Waters of Oblivion, or the Outer Realms), is a collective term used to describe one subset of the planes of existence, inhabited by the Daedra. Oblivion is the portion of the Aurbis mostly...
elderscrolls.fandom.com
ROB details in the very designs, WHAT these portal-machines do and WHERE they can end up. With "coordinates" listing a YUGE number of areas one can go to.
However, there is a "first stop" in the form of Nirn. Specifically, on Tamriel 5 years after the end of the Great War between the Empire and Aldmeri Dominion.