Scene
The Laws of Ravenloft
It's largely the same as D&D's Prime Material except:
- Divine casters and arcane casters both share the Mists as a source of power and are unaware of this until they do something the Mists find... distasteful.
- Anything that would allow for a creature to leave the demiplane fails.
- Beings that have been exposed to the Mists for long periods of time or have made an outright deal with the Dark Powers have special powers that come with (often cruel) drawbacks. These abilities can be anything from teleportation to immortality.
Cosmology
It formed from the deal made between Strahd von Zarovich and the Dark Powers that control the Mists. All the lands inside the demiplane were grabbed or copied from the rest of the planes in reality and form around darklords.
Principal Geography & Features
If it was possible to look down on the entire demiplane, you'd see a vast sea of changing, swirling Mist dotted with shifting islands of land. That'd be impossible, however, as time and space mean nothing to the Dark Powers.
Initial Active Setting
The party started in a domain, but have gone to several while I planned out this new Barovia.