Commission piece. If you're interested in the process, there's some WIP pictures here:
http://www.coolminiornot.com/forums/showthread.php?44390-Atgill-s-Workbench
:D
This remains one of my favorite minis. In the next 30 days, I hope to post my own version of the Emperor - done in 100% GW bits. I drew a lot of inspiration from your mini - love it!