Power Attack (3.5)

This weapon feat allows you to give up attack bonus to add damage to the attack.  You can reduce your attack by an amount equal to or less than your base attack bonus and add that amount to your damage bonus.  The penalty and damage bonus affects all attacks in the round.  This can't be used with light weapons and if used with a 2-hand weapon or a veratile weapon attacking in 2 hands the damage bonus is doubled for each attack point sacrificed.