Zeerith Xorlarrin had a bold plan, to retake the dwarven forge of Gauntlgrym.

The duergar and denizens of the Underdark commanded the land below, but it was Xorlarrin who commanded hundreds of goblin slaves and drider. 

Eventually the holds of Gauntlgrym would begin to fall, and pushing inward one day after nightless next, the denizens of the Underdark fought for control over the Pit that lay at the heart of the dwarven home.