As you study Grog's techniques more fully, you can put more power into your power attack while holding your balance. Bah, who needs puny swords when you got your big, giant sword?
Power Attack, Grog's Student, Weapon Focus (Greatsword), Improved Weapon Focus (Greatsword)
By trading a -3 penalty to your attack roll, you can batter your opponent with 60% more damage! This is an improved version of Power Attack.