An elegant weapon for a more civilized age? Perhaps. While not a true energy sword, this weapon features a physical metal blade that has been energized by a forcefield to protect it and offer an infinitely-fine cutting edge.
I started with the base game Thermic Lance mesh and replaced the grip with the texture from the legacy-content Opthalmoscope before adding the blade of the Katana from the Gun Runners' Arsenal DLC. I then added the animated glowing blue effect of the Proton Axe from the Old World Blues DLC.
The following properties, perks and challenges apply to this weapon:
This weapon must be purchased from Dr. Quarton, and cannot otherwise be obtained without console commands.