menacing fists

forget weapons when you have fists of steal 

(requires strength of 13 or above)

gain 2d6 to all unarmed strikes and 1d4 if barbarian or fighter 

gain ability Steal Strike    (1 per long rest)   add 1d4 and 2d6 force damage 

(how to get) 

ether at lv 4 or by kill 3 hostile creatures with out using using a weapon (at all even out of combat)