I spent 2 evenings modeling the Titanfall 2 Pulse Blade based on some concept graphics of our favorite throwable. More render images are available here: https://imgur.com/gallery/iJIcR0B

Designing done in Fusion 360 with 3D printing in mind. The whole thing should easily and nicely print on any FDM and resin printer. 4 Parts total, I've designed both a basic version and electronics version which fits an LED at the back of the blade, switch to arm/disarm it and a small battery to power it.

Instructions:

Parts:

5mm diameter LED of your chosen color (I'll go with red, you might even go with RGB if you manage to fit a driver inside of the pulse blade)

ESP 10xx/20xx/30xx switch to turn it on/off (They're all 10x2.5mm and 6.5mm tall with the pins)

4xM3 screws and nuts for assembly

Epoxy

A battery of your choice (Max dimensions are 55mm length and 18mm diameter as this is the size of internal electronics compartment)

Assembly:

Print all 4 files in the folder.

Epoxy together two halves of the blade.

Put the LED into the handle.

Put the switch into the handle.

Optional: might want to epoxy the switch and LED a bit depending on the tolerance of your printer.

Put in the battery into compartment, solder everything (battery to switch, switch to LED).

Close the pulse blade, assemble with 4xM3 screws and nuts.

Hint: If you're creative, try to fit an Arduino with a buzzer and RGB led in there. Good luck pilots :D

Stunning render via @Paweł Pleskaczyński, a great friend of mine and master of CGI.