Great Weapon Defense

You have mastered great weapons to the point that you can not only attack, but can defend yourself as well, using the great weapon to parry and block.

While wielding a two-handed melee weapon with which you are proficient, and wielding no other weapon or shield, you gain +2 to your AC. This bonus does not apply if you are stunned, paralyzed, frozen, incapacitated, or unconscious.