When I think of anything possessed in particular, I think of Death, aka The Grim Reaper. When you think of him, you think of his scythe. I like to think of it as what collects the souls of the dead if you will. Actually had an old blender file sitting around for this one. I've also included an estimated size recommendation.

Name: The Collector
Description: You guys will come up with something better than I can.

http://imgur.com/5MQLAhX ~ The Actual Scythe
http://imgur.com/XgE6klb ~ The Size Recommendation