Power Attack (Feat)
You can make exceptionally deadly melee attacks by sacrificing accuracy for strength.
Prerequisites: BAB +1, Proficient with a 1-handed or 2-handed melee weapon
Unlocks: Bloody Assault (Feat), Deadly Aim (Feat), Death or Glory (Feat), Demolisher (Feat), Furious Finish (Feat),
Pushing Assault (Feat), Riddle of Steel (Feat), Shield of Swings (Feat), Smash (Feat)
Benefit: You can choose to take a -1 penalty on all melee attack rolls and combat maneuver checks to gain a +2 bonus on all melee damage rolls and combat maneuver damage. This bonus to damage is increased by half (+50%, round down) if you are making an attack with a two-handed weapon or a one handed weapon using two hands. This bonus to damage is halved (-50%, round down) if you are making an attack with an off-hand weapon. This bonus damage never applies to a light weapon, see Piranha Strike (Feat) instead.
When your base attack bonus reaches +4, and every 4 points thereafter, the penalty increases by -1 and the bonus to damage increases by +2.
You must choose to use this feat before making an attack roll, and its effects last until your next turn. The bonus damage does not apply to touch attacks or effects that do not deal hit point damage.