The Emberhold is a duergar stronghold within the Underdark. Emberhold was designed and constructed by the duergar to be capable of resisting assaults from all directions. Very heavily manned and nearly impossible to penetrate without being seen, it has been conquered in the past by the Beholder, K'Varn. The central part of the city was also nearly destroyed by lava when Vox Machina stormed the fortress located within the Emberhold.