1. The Mortal World: All the worlds of creation, linked in a series, each better than the previous as each represents the One Gods efforts to achieve the perfect world, yet each sadly flawed. From some, the One God has fled, leaving the world as a plaything for lesser gods or devils.

2. The Parallel Planes – Two planes that are linked to the Mortal World, inexplicably bound in parallel. Some heretics take this parallelism to a logical conclusion and are forever damned.
Feywild (Plane of Faerie).
Shadowfell (Plane of Shadow).

3. Fundamental Planes – Two planes that surround the Mortal World.
The Astral Sea – The plane above. Consists of Astral Dominions.
The Elemental Chaos – The plane below. Consists of Elemental Realms.

4. Demiplanes – Unique bubbles of existence such as Sigil.

5. Anomalous Planes – Planes of an obscure nature; some scholars claim these realms are the twisted or broken memories of worlds that once were…or that never should have been.
The Far Realm – Uncharted plane that exists beyond the known cosmology.
The Plane of Dreams – Composed of all the dreams that have ever been dreamt.