The way his arm was posed made him a natural to be a Cutto class fighter. But since he was a big scary mutant, I gave him a big scary blade (instead of the usual shortsword or dagger blade such as on my other two cuttos).
I made the blade with a piece of plasticard. I used a triangular-sectioned microfile to make the serrated edge on the blade. To attach the blade to the cutto armor, I strapped a small length of brass rod to it (the reason for the wrappings at the base of the blade.)