Real-life retractable lightsabers create plasma by combining liquid propane gas and oxygen gas with a lot of heat. Read more: 12 Smart Gadgets You Didn't Know Existed The first person recognized ...

This is the closest thing to a real lightsaber yet! We engineered a 4,000-degree plasma lightsaber staff that’s completely cordless and fully functional. Can it cut through steel? Is it battle-ready?

It’s basically a lightsaber. Except smaller. And with an invisible blade. And cold to the touch. But other than that, this homebrew cold plasma torch (YouTube, embedded below) is just like the ...