Here's another old weapon I made from scratch, it's the weapon held by the character on the Amazoness Swords Woman card from the Yugioh TCG.

Grip is the ribbed part of an old Avengers Wasp figure accessory I think. The blade is a piece of styrene cut to shape. Rest is sculpted. If I made this again I would deeply bevel the edges on the blade this time around, so it doesn't look so plain.

And yes, it's supposed to have those garish purple/orange colors lol. I should probably make the spikes look like bone so it isn't so hideous.

(I should also snap some more pics because these are the only ones I found.)