Brutal Warrior

You excel at ruthless assaults, few would dare stop you in your brutal attacks.

Brute Force

Starting at 3rd level, you’re able to strike with your weapons with especially brutal force. Whenever you hit with a weapon attack that you’re proficient with and deal damage, the weapon’s damage increases by an amount based on your level in this class, dealing 1d4 extra damage at 3rd level, 1d6 at 10th level, 1d8 at 16th level, and 1d10 at 20th Level

 

Stalwart Durability

Beginning at 7th level, your toughness allows you to withstand most potentially disastrous effects. Though only from so many.
Whenever you make a saving throw, you can roll 1d6 and add the die to your saving throw total, however it cannot be used for Death Saves. If you reroll this save, you lose the bonus given by this feature.

This effect can only be used once per turn, and you may use this effect up to half your proficiency modifier (Rounded Down.). You regain all uses on a short rest.

 

Additional Fighting Style

At 10th level, you can choose a second option from the Fighting Style class feature.

 

Devastating Blow:

You tend to put everything you can into your strikes, to make each one be a telling blow, though your accuracy leaves something to be desired when you do so.
At 15th Level, once per turn, you may take a disadvantage to your weapon attack roll, if it hits, treat it as a critical hit for damage. This cannot be used if you already have disadvantage on an attack. Anything that would impose a disadvantage during the attack when it was called will not stop the attack however.

Ruthless Assault

You're at the pinnacle of your might, few would stand in your way should you take to felling a great enemy or nemesis. 
Starting at 18th level, in a given turn, you may activate this ability. Upon doing so you deal 2 more damage each attack you make. However, with each hit during the turn, this bonus increases by 2.
This effect ends once your turn begins the next round. During your next turn, you have disadvantage on all attacks, until the end of your turn. You cannot use this feature whilst you're imposed disadvantage from it.
You can use this feature twice a day, restoring uses on a short rest.