The Underdark

The Underdark is a shadowy land beneath Silvermount, with 3 underground races living within. All of them are embroiled in constant strife against eachother.

Duergar
The Duergar are the underground equivalent to Dwarves. We know almost nothing of their nature or intentions; They have been at war with the surface dwarves, and have been consistently pushed back into deeper and more obscure parts of the underdark.

Little is known about them at this point. They have a disdain for surface dwarves and are willing to kill them without hesitation.

Deep Gnomes
Deep Gnomes are commonly killed on sight by the Drow and the Duergar. They hate both parties as a result and have staged a rebellion in order to stand against them. They have been seen guarding doorways and passages, using puzzles of all things as ways of testing those who wish to pass.

They are participating in the war for a chance at overthrowing the Duergar and Drow, and taking the Underdark for themselves.

Drow
Very little is known of the Drow. They are supposedly evil and may be allied with the Duergar. They are the Underdark equivalent to elves. No more is known at this time.

Environment
The underdark has little to no natural light, and most going in have to rely on either darkvision or a lantern of some sort to see. There are mushrooms everywhere. Existing wildlife is few and far between- Most are insects, but there are a few outliers. Fomorians have existed and killed creatures from the 3 major races to survive. Hooked Horrors have preyed on and slain the weak and the defenseless. Crystal deposits crack out from the ground and make their presence known to all.