Derenath

Mindrath was the capital city of Estorium. Before the Illithid War, the city was one of the greatest in the world. In the center of the city was the majestic Crystalline Palace. It was one of the first cities hit when the mind flayers invaded, though, and now lies in ruins.

More recently, the wizard Tephra opened a gateway to the Far Realm within the city's temple of Boccob, admitting nightmarish hordes of aberrations into the world.