Blackmoor version of Dark Dwarves (Duergar/Derro) ?

[Freedom92]

I've used the Duergar(psionic) as dwarves who dug to deep and saw something sanity warping. They stayed deep toiling away keeping their minds busy, attempting to keep order in mind or else the whispers of that thing would drive their race to madness and make them its slaves. The thing in question is one of the sleeping ones possibly? I kept the thing vague. Theyre a bit different then traditional Duergar, more focused on their lawful aspect rather than evil.

I usually treat Derro as the strange race with insanity and science in mind. Coming up into cities and kidnapping people to experiment on them with their strange alchemical devices.