Thunderholme was a dwarven kingdom in the region known as the Thunder Peaks. Dwarven legends spoke of the city as favored by Dumathoin, the Keeper of Secrets Under the Mountain, and that it was home to the noblest miners and finest metalsmiths in the Realms. It was also said that its vaults were emptied in a day, when Dumathoin swept his chosen away to live in paradise with him. The truth however was far more horrible and tragic. The realm fell into decline when its king and heir were assassinated, and then was finally conquered by Aurgloroasa, a powerful shadow dragon, in 1054 DR.