The Legendary 12
Duergar are a sub-race of Dwarves, often given to cruel and evil natures. They are also known as “Gray Dwarves,” for their shady ways as well as the sometimes ashen quality to their skin obtained by rare exposure to sunlight. They are also characterized by very fair hair and bright eyes, both of which differ from regular Dwarves.
Duergar typically live in the Underdark, a series of inter-connecting, far underground tunnels and caverns, an environment shared by the Drow.
Duergar dislike their Dwarven cousins, having been banished centuries ago by the more honorable of the species. They sometimes work in concert with the Drow, but such alliances rarely last long, mainly due to Drow feelings of superiority.