Dark sun that isn't actually dark sun.
The Plane of Shadow
Also known as the Shadowfell, this plane is a pale reflection of the material realm it shares physical space with.
Not much is known about it, trips through the shadowfell are hazardous in a thousand small ways and a thousand more much larger ones, nevertheless travel through it is common, moving a league through the shadowfell moves you ten times that distance in the equivalent area of the material plane.
Denizens of the Shadowfell are also often in opposition to the Faewild, the reasons for this feud are lost to time, at least in our realm.
- The Lux Group and the Tenebrous Conglomerate. Or they’re the same thing. Or neither exist.
- The Shadow Troupe