Shadowfell

The Shadowfell is a plane of existence!

Description
The Shadowfell is a dreary place inhabited by the Shadarkai. It is also where the Raven Queen resides.

Plot
In the spooky forest, a Shadowfell portal had mysteriously spawned and was being guarded by a small group of eladrin. K'lol reluctantly led the party in to explore it, and they found a Shadarkai encampment also guarding the entrance from shambling figures in the distance.