In 1491 DR, Bruldenthar was chosen among many others as part of a diplomatic delegation, but at Beliard in the Dessarin Valley they were ambushed by the Cult of the Black Earth. Brudelnthar was captured and transported beyond the River Dessarin. There, in the Sumber Hills, they were attacked by the Cult of the Howling Hatred, which killed many earth cultists and prisoners.
Brudelnthar remained a prisoner of the Black Earth and with two other diplomat prisoners was transported to the Sacred Stone Monastery. There, he was put to work in a subterranean mine with many other prisoners from others raids, but the diplomats were soon after put in another place. At last, some adventurers hired to find the missing delegation infiltrated the monastery and freed Brudelnthar and many other prisoners.