The damned Blood mother from Dragon Age. Everything about how one is made and what it does is pretty disturbing.
Basically there are these magic..zombie things called the "Darkspawn". For each race in the Dragon Age univrse theres a corresponding Darkspawn. How are they created? Well if a living being gets infected with the blood of a Darkspawn they become one, but theres a more sinister way of making them. The Bloodmother.
Basically the Darkspawn take a female of a race, then keep feeding her flesh laying around (Darkspawn, Dwarf, Human anything) between bouts of what is implied to be rape. In time the woman grows to become the horrible creature and annoying boss you see now. A creature that births whatever darkspawn corresponds to her original race.