(click for larger image)
rotated so you can see the eevil deveel:
This one stumped me at first. My first first thought was of MC Escher's Angels&Devils (below). This one is inspired by that. While sketching, I started thinking of the light and dark playing off each other, and how that is like the chinese Yin Yang. And there it was, idea born. I was going to leave it B&W at first, but I rather like the colour in the end. done with ink & Photoslop.
and here is a Escher's take on the theme: