Theological Halloween Costumes

Halloween has always been my favorite holiday, and this year my seminary is hosting a Halloween party where we're supposed to come as our favorite biblical character. Something seems to be lacking here. Going as another (albeit ancient/legendary) person is not enough of a challenge. I'd like to see someone go as an idea or doctrine. I challenge someone to come up with a costume for Nietzsche's "will to power" or Tillich's "ground of being." Other ideas? Past successful costumes?