okay how is this off the top of my head.....sorry no crystals more of a torch theory with two mighty blades forged together with holes ½ inch apart all the way up and down say a couple rows of them an opening at the top so the flame from the torch extends a little out the top basically engulfing the steel in a blue green or orange heated flame glow so it cuts its hot like a lightsaber looks like a saber and when you clash they dont go through each other....any one a blacksmith? LOL Couldnt use it for long I bet fuel reasons and heat reasons but the handle could be made out of heat resistant material. Anyway if someone does have one of those metal machine shop deals go for it just dont blow yourself up! Also youll have to figure out how to get the switchblade part of this idea to work where it extends and detracts etc. use electric spark to ignite the saber eh? okay Im done bein stupid see ya