Im not too sure how the Butchers Blade works. I think this may be to do with how we resolve our combat.
Once a character has rolled their hits we usually roll for damage one at a time. I imagine the Butchers Blade works far better when rolled together.
So say I had a pick axe and Butchers Blade and 4 Combat. If I get 4 hits (not crits) and then I roll all my damage together and they all come up 3's against an enemy with 2 defense. Rather than doing 1 damage with each hit, i'd be doing 5 with each? For 20 damage.
Or should it be rolled one at a time, so if the first damage roll is a 3 (doing 1 wound) then even if the second was a 2, that one would be doing 3 damage (for 1 wound again). Then the next damage roll would be +2?
Really not quite sure how best to go about it or whats intended with it.