Kama with Kunai Chain
I would like you to make a larp version of this:
Except instead of just a ball or stick at the end of the chain, you use a kunai knife instead. The chain can't be made of metal obviously. If you were to make each chain piece with it's own core, I'm sure it would work out fine, and be quite effective against people with shields.
Nice idea, although getting the chain to be of a decent length would be quite hard to make.