You have mastered your hand-to-hand weapon effectiveness to perfect your attacks better while on the battlefield: You gain the following effects:

• When you roll a one on a damage die for an attack you make with a Melee Weapon that you are wielding with two hands, you can reroll the die, and you must use the new roll. The Weapon must have the Two-Handed or Versatile property to gain this benefit.
• If you have already taken this fighting style through your class, you cannot retake this style.