The Underworld

The Underworld was formed with the death of several Primordials during the Primordial War. With the last breath, they dragged a part of Creation's essence with them, forming the dark mirror image of the world they have created.
The geography of the Underworld is very similar to that of Creation. However it lacks the elemental poles. Where lies the Blessed Isle in Creation, the Underworld possess its own Isle of Sorrows. Where Creation has an immensely tall mountain, the Mount Meru, the Underworld has a large pit leading down to the Labyrinth and, eventually, Mouth of Void and then.... Oblivion.

Type

Dimensional plane