I also like the Vlad Tepes idea. Are you planning on making the costume realistic, the "human" Vlad, or make him a vampire? If like a vampire, that can never be too over done, there are so many ways to do a vampire, and if you check thrift stores, garage sales, etc., you can find things reasonable to modify and make into the costume.Same with the human personna, just find things to modify and use as the actual Vlad. Find a picture of him, and go from there, it doesn't have to be exact, just something along the same lines.