| Zwordsman |
Probably quoting would get more responses.
"hile in rage, a barbarian cannot use any Charisma-, Dexterity-, or Intelligence-based skills (except Acrobatics, Fly, Intimidate, and Ride) or any ability that requires patience or concentration."
So the only restrictions I can find on Barb is this.
That steel break ability looks to be a Wis check. So I don't believe its invalid. It isn't casting nor is it char,dex,int based skill check.
so I don't see an issue