Except it is not and does not, because the Ordial Plane does not exist.
The brainchild of a number of fans, the Ordial Plane is an idea that rapidly caught on between fans who accepted or at least liked the idea of the Plane of Proof. For starters, it would mean that the three rules of Planescape now fully apply to the cosmology:
- Unity of Rings, because with three transitive planes and the Prime Material, Inner and Outer Planes all connecting the cosmos is now ring-shaped.
- Rule of Three, because there are now three transitive planes.
- Center of All, because Sigil connects to all of these places.
The Ordial is the Plane of Proof for it is what lies between Belief and Substance, for belief with proof has substance and substance with proof can be believed in. Exactly what this proof is however is a matter of debate. Is it the true form of the gods? Do the other gods live here? Do Vestiges hang out here? Is it the spirit world? Is it the Far Realm? Nobody really knows for sure, meaning that there's a lot of Belief but no Substance to any claims about the Ordial Plane. And given its fanmade nature it's not likely that the Ordial will become canon anytime soon.
It is interesting to note that the creation of and believe in the Ordial Plane is exactly in the spirit of Planescape: people start to believe in something, then start to spread that idea to others in order to convince them that it's right. Except without the philosophers with clubs aspect of Planescape's Factions. And good riddance to that.
|The Cosmology of Planescape|
|Inner Planes||Ethereal Plane||Prime Material||Astral Plane||Outer Planes||Ordial Plane?|
| Demiplane of Dread
Plane of Shadow
| Plane of Mirrors
World Serpent Inn