This is my last-minute submission to ~weaponry-guild's Future and Fantasy contest.

I looked around and found that chain swords (combination chain saw and sword) have been done a few times before, so it's not really an original idea. But has anybody done a steampunk version? I was originally going to do this as a photomanip (and I still might!) with the back end of a weed whacker driving it. That was before I settled on steampunk.

So what you've got here is a small steam turbine on the back. This turns a drive shaft, which runs through the hollow handle. Gears in the front of the hilt (you can see one sticking out) change the direction of the rotation in order to drive the chain. At the end, you can see that the chain goes inside the blade, and the end extends forward into a point for better stabbing. I figured it would slip or grab on and run away if you stabbed with the chain. I mean, have you ever tried to poke a tree with a chainsaw? No? Maybe there's a good reason for that.