This figure is from a series I called "Something Wicked This Way Comes". The entire series were demons, which were great fun to create since, with demons, there are no rules! You can get as crazy as you want!
I have had this raven skull sitting unused in my collection since it first came out as part of the Gothitropolis Kickstarter from the 4H. I could never find a good way to use it since it always felt out of place on top of the "birds", since the rest of their bodies are feathered and none skeletal. I finally got a chance to use it here as one of my "Something Wicked This Way Comes Demons".
The body on this is a Skeleton Legion Builder. The head, as already stated, is from the "bone wings" set from the Gothitropolis Ravens wave from the Horsemen. The hands came from a Vultus from that came wave. They were painted a bit to match the bones and they plug right into the wrist sockets.
Finally, the black, tattered robes on this custom, and the sword, came from a Lord of the Rings Witchking Ringwraith.