This was sketched on the black side of the blank variant of StormShadow #1 from Devil's Due a few years back. This was produced before the big blank comic cover craze, and man the paper was glossy as all get out.
You can read about the shenanigans that ensued when I tried to ink this crazy thing here on my blog:[link]
Click on the download button for a slightly larger image. Click on the Link to my blog for that virtual High-5 of support!