Grimm-Imp

The Imp has an emaciated, somewhat humanoid torso with rib-like protrusions and pectoral-like bone plates on its chest, as well as a series of bone spikes along its upper spine. Its two long, thin arms end in a hand with only two fingers. The shape of its head is similar to that of a Human head but with a longer, pointier chin.
  Its mask bears some resemblance to a Human skull, but the holes that serve as the eye sockets are elongated and slope downward. On its forehead, at the top of its mask, are two long, curved horns. Strips of flesh connect its upper and bottom lips, but it is able to tear these strips to fully open its mouth.
  Imps are able to stretch their arms over long distances and rotate their torsos without injury. They can also emit a scream that is very discomforting to the ear.