Ground Shatter
You are exclusively accustomed to using Heavy and Two Handed weapons and making the world know it. At 3rd level as a Bonus Action when you would make a weapon attack with a Heavy or Two Handed weapon you can slam it into the ground as part of the attack. On a successful hit the target must make a Strength Save versus your Brawl Save DC or be knocked prone. Additionally hit or miss the ground in a 10 ft radius of the target of the attack is treated as difficult terrain.
All in One
While other weapon wielders wait for an opening you throw caution to the wind putting everything into one devastating attack that blasts through anything in its way. At 6th level in place of the attack action you can take the Single Attack action as long as you are attacking with a weapon with the heavy or two handed properties. When you do so, you gain a bonus to your attack, damage, and critical range equal to the number of attacks you would normally make during an attack action. On a successful hit you gain resolve equal to the number of attacks you would normally make during an attack action and your damage is treated as if all those attacks hit totaling the number of damage die you normally would have done and dealing it in a single instance, but you only add your modifier once.
Executioner
You can see when an enemy is weak and take advantage of it. At 13th level when you make a weapon attack with a heavy or two handed weapon against a creature under half hit points and miss you can use your reaction to remake the attack roll.
Overpower
A raised shield means nothing in face of extreme might. At 20th level the target of your Single Attack action cannot reduce its damage by any means.