I like the mummy from the Cookie Cutter Halloween set a lot because you don't really do much to finish him (or her)! I felt like I needed to do something besides just stamp it onto Whisper White cardstock, that is just too easy, so I stamped it onto watercolor paper instead.
In this photo you can also see that I frayed the edges of my Basic Black cardstock as well, sort of adding to the dingy feel.
I also added some bats from the set and some Bat Washi Tape. I even added some black thread just for fun.