Covers are a huge part of the publishing process for self-pubs. We have the freedom to do what we want instead of a publisher making that decision for us, but we also have to go at it with a sense of adventure and in my case, a handful of friends. This was a really fun experience for me since I got to be part of the splattering of fake blood (mixed up in my very own kitchen) and a really confusing experience for the employees of one hardware store and one lumber store who had to deal with me trying to explain that I needed rough plywood for an "art project." I didn't mention the part about splattering it with blood.
As promised, here is the original drawing by yours truly.