Nearly 2,000 feet below Saltwater’s Weep in the Nar-Voth layer of the Darklands is the City of Umberstone.
Umberstone is home to roughly 5,000 Duergar but it is not ruled by them. The Duergar are ruled by roughly 3,000 Drow who live amongst them, nearly 150 of which are the feared Drow Nobles. The twin noble houses of Tuloth and Nadier hold the city as an outpost for a larger city that rests in the caverns beneath Umberstone.
In the layer of the Darkland’s known as Sekamina through nearly 50 miles of twisting tunnels lies the Drow city of Tulonasinoth and it is from this city that the Drow who rule Umberstone originate.