Underworld

History
The Underworld is a massive labyrinthine network of caverns that spawn the entirety of the world of Anor Mundus. Although the upper reaches of the Underworld are fairly normal, the deepest reaches of the underworld are alien in nature, impossible magical realms and littered with ancient structures older than any civilization on the surface.

Many surface dwellers have braved the dangers of the underworld for its riches, from mundane ore and gems to magical materials such as cold iron, candelstones, mithral or even the mystical worldstones.

People
After their exile in the age of Darkness, the Sorenir, or deep elves, have made their home in the underworld, so have the Earthen who first awoke from their slumber deep in the Underworld. Many magical creatures or uncivilized beings dwell hidden away in the underworld, so do those exiled from the surface for their aberrant practices such as fiend worshipers or those tainted by the entities of the twisted eternities.