The Ordial Plane

The Ordial Plane is a mysterious place. The Rule of Three and the Unity of Rings both seem to confirm its existence as the Plane of Proof - that which links matter and belief, supplying form to the Outer Planes - yet it has never been conclusively confirmed by planar explorers.

Some believe it may be that outer realm in which Vestiges are trapped, though this is unlikely. Many have conjectured that it might be inhabited by those creatures which call both the Ethereal and the Astral home - completing the trine, if you will. Those creatures certainly aren't telling.

The Ordial Plane, if it does exist, would likely mirror characteristics of the Ethereal and Astral Planes; no layers, just an infinite expanse, and with borders to the Inner and Outer Planes. As the conventional plane (in the sense of being a part of this multiverse) furthest from the Material Plane, it is inherently difficult for Primes to conceive of. This may be why planar travelers have never found it - stumbling across a gate to the Ordial, they may not have been able to recognize the portal for what it was, or even the realm beyond for a different place.