Laduguer

The Exile
The dwarf god of tyranny and magic is Laduguer, and for a long time he dwelt with Moradin under Mount Celestia. He crafted some of the greatest magic tools and weapons in all the upper planes, but so proud of them he was that he grew bitter and angry when those he deemed unworthy would wield them. And he deemed almost all to be unworthy of his craft, and non-dwarfs were less than unworthy. His xenophobia and pride led to his exile from the dwarf pantheon.

Dwarf theology claims he committed horrible crimes against the other dwarf gods and that Moradin had battled him after an insult to the Soul Forger's honor. And that he would have been slain by Moradin if it were not for the mercy of Berronar Truesilver who was able to stop her husband in his battlerage.

Now Laduguer toils underneath the battlefields of Acheron forging weapons for the war gods above in exchange for slaves and captured enemies. He is the patron of Grey Dwarfs of the Underdark, and they are as dangerous and hateful as he.