Nagashizzar

AKA Glory of Nagash in Nehekharan, The Cursed Pit by the Skaven, is Nagash's second base of operation (the first being the Black Pyramid) after he was chased out of Nehekhara from his first defeat. It is a terrifying mega fortress with many edgy skull sculpture, all designed by Nagash himself (who is said to have studied Nehekharan architectural for 40 years). It is also the mining site of a gigantic fuckoff warpstone meteor. Skaven had tried to fight Nagash for it, only to end the conflict in a draw, then took it back after they had a certain fallen king to do their dirty work. After a long ass time, the damned place's warpstone is completely mined out by the Skaven of the Clan Rikek, but were destroyed in a single night by Nagash's second return. After Sigmar kicked Nagash's arse, the said bone daddy was regenerated again at Nagashizzar, only this time he is so weakened that he is but a husk sitting on his throne, and all he can do was ordering his undead soldier around the fortress to ensure Skaven does not disturb his eternal nap time.