This design is based on the Fremen Crysknife as seen in the 1984 David Lynch adaptation of Dune.
I've not finished sanding and painting it but I did a quick paint over in photoshop so it looks nice in the pic.
I printed this in one piece with supports. I wanted the print lines to be running along the blade so the texture would align with the grain direction. If you want to print it without supports then print in two halves.