So, I had considered this little thing. The idea is basically a simple pair of vine hand wraps that you equip in the "Hand" slot, like a shield or gauntlet. With these on, your everyday "punch thing in world to break it down into recollectable resources" action when not wielding anything can now actually be used to hurt critters too.
In case it's not simple-enough:
TL,DR: simple vine hand wraps that allow you to punch stuff for combat purposes.
Could have a more advanced bronze age version in the form of a leather hand wrap with bronze studs. Essentially a Dark Souls caestus.
For all of your brawlers out there, with love.