This is a model of the sword wielded by the character Slade Wilson in the series Arrow (first season I think). I originally modelled this back in 2015 to cut out with a laser cutter out of wood or black acrylic (hence the included dxf file), but you could also 3d print this as a keychain. You'd probably have to fiddle with the scale a bit, since this was designed as a life-sized prop.
The handle is quite thin since it actually requires a black string to be wound around it. If you want to find more pics of this blade, you can also look it up as 'tactical ninja swords' (you can even buy real ones).
Fun fact: I didn't know you could overlay an image onto a sketch in Inventor (my CAD software of choice), so I had to eyeball this entire thing with an image next to me. Even if I did know, most of the pictures online are at an angle, so the fact that this came out even remotely fine is an achievement to me :)
Let me know if you print/cut this thing or if you have any questions!