Bruiser

You are very large and abnormally strong. Weapons aren't needed, your fists should suffice. Brute strength is all you need to win battles, no tacky weapons or armor.

Unarmored defense

Your body has reached the peak of strength, and armor is no longer something you need. While wearing no armor, your AC equals 10 + your strength modifier + your constitution modifier.

Brute Strength

Strength is what you need most, so strength is what you gain most. Your strength increases by 2, and your maximum strength becomes 30 rather than 20.

Powerful punches

Your can roll a d6 rather than the normal damage for your unarmed strikes. This damage will increase as you gain levels.

Barrage

At 7th level, you have proven that your punches are not only powerful, but also fast. As an action, you can hit an enemy with a barrage of punches dealing 2d4 bludgeoning damage times your fighter level. Once you use this feature you cannot use it again until you finish a short or long rest. You can use it twice per rest at 10th level and three times at 15th level.

Heavy punch

As an action, you can make a melee weapon attack dealing 5d10 bludgeoning damage and the target must make a strength saving throw with the DC equaling 8 + your strength modifier + your proficiency bonus. On a failed save, the target is pushed up to 10 feet and knocked prone. You can use this twice per short rest.

Air moving punches

Your punches have become so powerful that they can force air to move along with them. When you miss with an unarmed strike, you may reroll the attack, if the reroll hits, it deals 1d4 + your strength modifier.

Full power barrage

You now are experienced enough to combine the speed and power of your punches. When you use a barrage on your turn, you can heavy punch at the end.