Tales of Tolgard
The duergar pantheon is only made up of two deities. The leader of the pantheon is Laduguer. Deep Duerra, the only other power in this pantheon, constantly seeks to overthrow Laduguer. They share a realm called Hammergrim on the Thuldanin layer of Infernal Battlefield of Acheron.
This pantheon counts among its enemies most of the surface powers of the Material Plane, but holds a special hatred for the Morndinsamman. It’s primary attention is focused on the Underdark, however, and the Illithid Pantheon they hold most responsible for their race’s captivity.