Shadow Keep

Shadow Keep was the divine realm of Mask.

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

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

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