Valorheim

Valorheim is a realm, possibly a plane, that the Aðalmundr strive to reach by achieving a glorious death. It is said to be a place of eternal peace where a warrior may earn rest at last within a paradise of revelry.

As a Plane
Valorheim has never been discovered by planar travelers from Relia, so it is unknown if it exists within the known planar structure, or even if it exists at all.

If it does exist, it is likely the pathway to Valorheim is somehow connected to the Stairwell.