TwoSix
Everyone's literal second-favorite poster
Barbarians don't get Fighting Styles without multiclassing (and multiclassing itself has many downsides with it, such as delayed extra attacks or subclass features). However, they do get Brutal Critical, which allows them to multiply damage dice, which is nice when your damage die is a d12.
He's talking about this line, I'm pretty sure.I know that's why my example was a Barb1/Fighter1.
A 2nd level Barbarian can't consider the reroll, as it does not have access to the fighting style that allows it.2nd level Barb. with Great Axe - +5 to hit, 2d6+5 (7-17; Av. 12 but you should consider the 1-2 re-roll so it is closer to 13+) damage