Drider

These centaur-like creatures have the head and torso of a drow, with the abdomen and legs of a spider. They are not born, but are instead created through a mysterious ritual, which forcefully and painfully changes a drown into a drider. This is typically done as an extreme punishment.
Drider are sexless, and possess both an extreme shame and constantly are in pain because of the transformation. These have the effect of older drider becoming more and more crazed with time.