Dragnuhl

In the beginning there were only the two brothers Jamboloydia and Dragnuhl.
Jamboloydia was bored with his existence so he decided he wanted to create the material plane, the world as we know it today. Dragnuhl was not pleased with his brother's creation and wanted to destroy it so they battled for eons and in the end Jamboloydia was victorious.
Although Jamboloydia was victorious he could not kill his brother so he created a prison for him in a realm that would later be known as hell. He cast out Dragnuhl from Celestia, the realm of the gods, and into hell. To this day Dragnuhl is still imprisoned in his cage in hell.
During his time in hell he managed to father a child. His daughter is Qorin the deathbringer who he hoped would put an end to his brother's terrible creation. But alas she failed and was cast back into hell where she is also trapped.
As time went she began to form plans of her own and Dragnuhl did not like this and therefore in a fit of rage disowned her. Dragnuhl now hates her just as much as his brother.
Although Dragnuhl is trapped in a cage in hell is still considered the king of hell and all beings in that realm fear him and recognize his power.
Dragnuhl has very few followers in the material plane and his followers mainly consist of demons who manage to come to the material plane and a few crazed humanoids who wish for the destruction of all things.