Here is a sketch of what have in mind for the Wounded Gaia cosmology:
By
golan2072 at 2009-07-11
The Spirit Realm replaces the Ethereal, Plane of Shadow and the Astral. The Mortal Realm and the Spirit Realm are interconnected, and to some degree overlapped, but there are places in the Spirit Realm that are beyond the Mortal Realm; some of them far beyond. Fey, shadow-creatures, incorporeal undead and so forth are Spirits, and thus dwell in the Spirit Realm (and may manifest in the Mortal Realm).
When a mortal dies and is properly put to rest, his or her spirit travels to the Realm of the Dead, where it slowly drifts away from the Mortal and Spirit realms. If a dead person is not properly buried or put to rest, or if the circumstances of his or her death leave a strong emotional impression on the spirit, he or she lingers in the Spirit Realm as an incorporeal undead.
The Elemental Realms represent the metaphysical building blocks of the cosmos - Fire, Air, Earth and Water. Each is inhabited by spiritual beings of its element - not just elementals but also others (some of which are docile, some could be very nasty). It is possible to "punch through" with magic and open direct portals to the Elemental Realms or to the Realm of the Dead while circumventing the Spirit Realm.
Both major gods - the Mother Goddess and the Clockwork God - inhabit the Mortal World and the Spirit World simultaneously.
There are no "Good" or "Evil" planes in this setting. Spells such as Protection from Evil or Dispel Evil become Protection from Spirits an Dispel Spirit.