So a few weeks ago I started talking about a monster type I made called the Edere Vir. Originally envisioned as a part of the World of Darkness, they were humans that preyed on other humans for power and advantage within society. I'm still turning the idea over.
As a WoD monster, there'd be a point value assigned to each body part which they could use to power their abilities. Eyes would cost something like one, legs would cost four, etc. An Edere Vir would only be able to store 10 or so points as a starting character unless they got a meta power.