Take material. Grind one end pointy and sharp on a piece of concrete. Tie rags on the other end for a better grip. Pointy end goes into the bad guys. Repeat as needed until no longer needed.
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You could check out my instructable. ;-)
Cavemen, with no language or reading skills could make one, and you have the entire internet at your fingertips. Our species is doomed....
get a sharp piece of metal, and add a handle.