Reverse Side of Oblivion

The Reverse Side of Oblivion is a strange place that is not well known to man. It is shrouded in perpetual mystery, given that it does not correspond to any known belief. Every daedric plane is known to contain a reverse side, and it is speculated that the planes of Aetherius might contain an analogue as well.

So far, it is known that the Fontaine Family has the ability to visit the Reverse Side of Oblivion, especially their first Ancestor Sebastien. It is not known if any other people have visited the reverse side planes.

Properties
The Reverse Sides of Oblivion is actually a collection of 17 daedric planes, which actually do exist. While it is difficult for them to be comprehended, much less reached, these planes are in fact the true representation of what the various planes of Oblivion look like. The surface appearances when a mortal manages to peer into a daedric plane is naught but an illusion, meant to dissuade and discourage unworthy mortals from prying the secrets of Oblivion.

It is known that only if a Daedric Prince grants explicit permission, or if one is unchained to the flow of fate and destiny can they actually enter a Reverse Side of Oblivion. As such, it is something that is commonly accessed by members of the Fontaine family, and even then they do not visit it frequently. No other well known visitors are recorded.

The Reverse Plane of a Plane of Oblivion is known not to be a separate dimension, but rather the "truth" of a dimension itself, as perceived by anyone. This means that it would be impossible for a Daedric Prince to present the normal Plane of view to anyone who has seen their Reverse Plane, and what they truly are, for the mystery around them has been penetrated, and lies perpetuated to cloud the mind break down.

A daedric prince is known to be forced into their fixed, true form, not whatever form they wish to appear to mortals as, when they are within their respective Reverse Planes. This consequence causes them to normally reject allowing anyone to enter the Reverse Plane, and this right is only reserved for those they respect.