Ethereum

The Etherum is a plane that exists adjacent to the Prime Material Plane, touching it with its border zone, also known as Liminal Ethereum. It is possible to observe the bordering Plane from Liminal Ethereum, but no verbal communication is possible in this state, neither was the harming of material matter. The region beyond the Liminal was called Deep Etheruem. In the Deep, the passage of time is slowed to one tenth of the origin plane. It is filled with swirling blobs of protomatter which are capable of forming new demiplanes under the right circumstances. From the deep there were access points to the Inner Planes in the form of colorful curtains, each unique color leading to a distinct plane. Such curtains look to be always in motion and as if illuminated by sparkling light, akin to northern lights.