Stunning Shield Bash

You have learned to use a shield offensively giving you the following bonus attack options when you take the attack action. 

- You can make a shield bash attack as bonus action.

- Add a Battlemaster maneuver die to fuel this maneuver, this die replenishes on a short rest

- When you hit with a shield bash you can attempt to stun the target; roll a maneuver die and add it to the damage; target must roll a Con saving throw vs. your DC for Battlemaster maneuvers (8+Str or Dex mod+Prof bonus) or be stunned until the end of your next turn.