Swords are cool and everything, but a sword on fire raises the awesome to its highest levels. That’s why Kevin Kohler (a.k.a. Backyard Scientist) took a harmless foam toy and turned it into a D&D nerd’s wet dream.
Turns out all you need is steel break line, molten aluminum, a propane tank, and reckless disregard for fire safety. Please be safe with your +1 magic short sword with an extra 1d4 fire damage (crit 19-20/x2).