Board Thread:Off Topic/@comment-25857155-20150111054847/@comment-25555436-20150116014946

If that happened, it wouldn't be a Grimm anymore. I still remember what Wynne said about abominations in Dragon Age Origins. It's chaos, lack of soul and mind, and destruction what defines an abomination. If one was able to retain or recover their mind and soul, then they wouldn't be an abomination.

Same thing here. A Grimm that has a Soul is not a Grimm, it's just a black furred bony animal.

As for the whys, we could always go the easy route with the explanation: