Shadow Keep

Shadow Keep was the divine realm of Mask.

Location
In the Great Wheel cosmology, Shadow Keep was on Niflheim on Hades. >

In the World Tree cosmology, Shadow Keep was found on the Plane of Shadow.

Features
Shadow Keep was a castle. It was surrounded ba fog and shadow and therefore hard to see and confusing for would-be onlookers. The one mean to make it stand out clearly was the casting of a daylight spell.