A Khopesh , Egyptian sword
I have seen some extreme bend larp weapons lately, all Scimitars.
But It would be great to see this old egyptian "sickle-sword" as a larp weapon.
maybe even the mambele (sickle sword) that would be cool as well
This will be pioneering and a real challenge. But I'd second any Egyptian style weaponry.
Steef de Jong commented
It's a big technical challenge, and might not even be possible.