The heavy blade blends accurate attacks and quick parries into a potent package. You have learned to use your weapon to deflect enemies' attacks as you move about the battlefield.
Benefit: You gain a +1 feat bonus to weapon attack rolls that you make with a heavy blade. This bonus increases to +2 at 11th level and +3 at 21st level. In addition, while wielding a heavy blade, you gain a +2 bonus to all defenses against opportunity attacks.[Essentials:314]