As far as fictional swords go Voltron's flame-spitting Blazing Sword is definitely one of the coolest in the cartoon galaxy. Of course, it doesn't hurt that it exudes fiery energy, an attribute that makes it seemingly impossible for fans to replicate.
Enter Man At Arms: Reforged, the geeky guys who forge the fictional swords we've dreamed about wielding since we were kids.
The Man At Arms crew managed to make a propane powered replica that is fully functional and always on fire, meaning it's actually capable of defending the universe.
-Via Sploid