Editing Skein of Worlds:The Transitive Planes (section)

== The Ethereal Planes ==
The simplest of the transitive planes is the Ethereal Plane. This plane exists as like a shadow behind the material plane, at least around the spheres. It seems that the Ethereal Plane doesn't extend very far into the Void. Only the closest of spheres are connected ethereally. Some planar travelers tell of the Deep Ethereal, where it extends farther and farther into the Void, at the same time getting farther and farther from the material plane. Such tales invariably involve frightening encounters with strange and dangerous creatures, although how much truth there is in these tales is unknown.

While near the material plane, the Ethereal looks very similar. Colors are muted, but the terrain is mostly the same. Moving deeper into the Ethereal is like moving though the layers of an onion, although there seems to be no center to move towards or away from. As the material plane gets further away, the terrain becomes more and more alien. Landmarks are lost, and even which way it is back to the material plane becomes harder and harder to determine. Not only do travelers through the Ethereal Plane risk getting lost, they must also deal with the difficulty of moving deeper and deeper through the layers. Most spells that don't allow travel to a specific place can only traverse a single layer at a time. The Deep Ethereal may be a means to travel between spheres, but by no means is it an easy route.

Old buildings may bleed over into the first layers Ethereal after many long years, and if such a building has been recently destroyed, it may be possible to see a ghost of the building still. Life, on the other hand, doesn't bleed through in the same way as inanimate materials do. Life only exists within a single layer, and each layer seems to have at least some life of its own.