This is part of the multiple drawings/studies I had to make for my pre-production class.
The assignement was to design a carriage for one of the various "guardians" included (e.g ranger, warrior, monk, etc) I chose the Necromancer.
This was both a light/shading study as working out the textures of the thing. If you didn't notice, most of the carriage is made of flesh, an eye, and the rest is pretty much just metal plating.
It's not entirely finished, but I didn't even get my perspective shading study finished, so I was very short on time. (no sleep either)