Khundrukar

Khundrukar is a secret dwarven stronghold rumored to reside somewhere in Sword Coast North, a few days' travel north of Blasingdell. Rumors say that a small crag on the ground leads to a deep and well-hidden underground fortress
Legends tell of Dhurgeddin the Black, a strong and stubborn dwarven artisan, his exceptional smithing skills known to everyone. About 200 years ago, his home village was a victim of a brutal attack by orcs and trolls. Durgeddin stepped up as leader and led the survivors to find a new home. They wandered for a long time before discovering a cavern complex within a mountain, away from prying eyes and savage dangers, and built the Khundrukar stronghold there.
100 years had passed when one of Dhurgeddin’s clansmen was captured by another tribe of savage orcs. After being held prisoner and tortured, he revealed the location of Khundrukar to the orcs. These orcs raised an army, dug tunnels around the fortress surrounding it and after a long siege spanning several weeks, managed to infiltrate it. Mostly everyone was killed, Dhurgeddin among them, and the fortress looted and abandoned.
Stories tell about how during the siege Dhurgeddin, in his anger, furiously worked day and night to forge exceptional blades and weapons for the dwarves to help make their stand. There are rumors of treasure and legendary weapons forged by Dhurgeddin that still remain deep in the underground fortress, waiting to be discovered. But few know of the location and those who do, are afraid to go after them. Tales of savage tribes and fearsome monsters inhabiting the ruins are keeping them out.