Derro

Derro are a strange, dwarfish race that dwell in the Underdark. Although they superficially resemble pale Dwarves, they seem to be unrelated. They claim to have been created by a dead god they call Bezonathar, but no such deity seems to have ever existed. Now, sinister things that lurk in the darknesses of empty caves and in the spaces between the stars seem to whisper to them, promising power in exchange for worship and service.
Derro are uniformly mad, although their insanities manifest in different ways. They have skin so pale and thing as to be nearly translucent, and one can often see spiderwebs of blue veins through it. Their hair tends to range from white to a light straw color, and their protruding, solidly-white eyes stare into deep darkness. They are not blind, despite their appearance, and they would tell you that their sight extends beyond most people’s comprehension.
As I said…mad.