So... some friends and I got hooked into Munchkin, and we started coming up with possible cards. With a bit of help, I ended up coming up with a Creeper, and another came up with an appropriate curse card ("Ssssss...").

So... yeah... I took a stab at duplicating the artistic style.for both cards...

2B mechanical pencil, Micron Pens (08, 05, 03, 005)
Munchkin (C) Steve Jackson