Derro

Derro are a species of monstrous humanoids that inhabit the Underdark.

Physical description
Derro appear to be some degenerate hybrid of dwarves and humans. Their rough skin is white with blue undertones and have sporadic tufts of coarse, tan or pale blonde hair. The eyes of the derro lack any visible pupils.

Society
Derro are widespread and are likely to be found in small bands throughout the Underdark. Derro warrens exist in many drow and duergar cities; independent derro strongholds lie in the deepest reaches of the Underdark. Derro scouts and marauders search the areas near and around their settlements for victims to enslave and torment.

The derro are a strange and sadistic race. While clever and stealthy they are also murderously insane. It is very common for derro to devote themselves to some strange quest, such as collecting only certain types of gemstones or slaying as many members of a particular race as possible. Some derro are assigned specific missions by powerful derro savants, with the possibility that they might even join a company of comrades to fulfill some irrational goal.

Religion
There are only two deities in which the derro are known to worship, Diirinka and Diinkarazan.

History
The derro are thought to be the result of genetic breeding performed by the illithid on members of the dwarven clan of Delzoun.