You have trained excessively with one-handed weapons, to the point where you can make better use of your physique in combat. Your attacks hit harder and in vulnerable spots on your opponent. Additionally you can find exposures in the enemy's guard when maneuvering around in a fight whilst keeping your guard up.

• Whenever you attack with a melee weapon that you wield in one hand that you are proficient with, you may add half (rounded up) of your ability score modifier for Strength or Dexterity (your choice) to the damage rolls of that attack. You cannot use the same ability score modifier through this feat that you are already using for your attack.
• Once per turn when you take the disengage action and move away from a creature within your reach, you may make a weapon attack against that creature with a melee weapon you wield in one hand that you are proficient with. You may use the rules for Two-Weapon Fighting for this attack as if you took the attack action, as long as you wield the other weapon in one hand and you are proficient with it.
• Whenever you are attacked by an opportunity attack or an attack that uses a reaction, and it isn't a ranged attack, you have +1 AC for each weapon you wield in one hand that you are proficient with.