The Plane of Shadow
The Plane of Shadow is a dark and twisted primal reflection of the known world. It is a place where time and distance are mutable and ever changing, the inhabitants primal and ferocious. It is always no brighter than dusk here, with the landscape illuminated dimly by the twin stars Ahn-Kerr and Sen-Giel. For the Durnskald, the Plane of Shadow might as well be the Prime Material, as the Plane of Shadow is always coterminous in the Darklands.
Pergisursian historians used to think that the Plane of Shadow was the broken and ravaged after image of Galavan, created in a process related to an Arcane Resonance phenomenon. This has since fallen out of favor in light of new theories distantly linking the Plane of Shadow to the influence of the Far Realm, which the Durnskald refer to as Gehenna Ra. The Durnskald know that there is an element of truth to this theory.