this is a sword, but not just any sword, its a chainsword - i got the idea from dawn of war and warhammer as many of the units in the games use chainswords.
Step 1: Main Frame
here is the front and the main structure
Step 3: Connecting the Motor
the seperate motor controler in the handle allows the sword to be more authentic as the realy blades arent working all the time but only when the user wants it on
Step 5: Your Done
thats it you have just created a chain sword, have fun with it.
if you get stuck or need some help just let me know.