Board Thread:Speculation House/@comment-25250830-20141003012248/@comment-4830106-20141003015356

If that's the case, Grimm seem to be a lot like spirits in the Avatarverse, only instead of becoming destructive in the presence of negative emotion, they're just drawn to it. What especially interested me was the revelation that Grimm are not only capable of learning, but not inherently aggressive.

If they're capable of learning, then that means there are more intelligent Grimm out there, perhaps even a sapient Grimm that is capable of not only planning, but intelligent communication. Could this be the power that Cinder is trying to harness?