Wraith Omniverse

The Wraith Omniverse is the fictional universe that the Doom Saga takes place in. It is a vast multidimensional universe with several layers and an extensive three hundred billion year history.

Dimensions
The omniverse makes up several layers, often called planes.

Higher Multiverse
The Higher Multiverse is the highest layer of the omniverse, consisting of millions of planes. The highest plane is the Holy Matrix.

Mid Planes
The Mid Planes exist in a pocket between the Higher Multiverse and the Low Universe. The dark mid plane is the Jikku, and the light mid-plane is the Aesahra.

Low Universe
The Low Universe is the physical universe in which Olimar and the Pikmin reside.