Your swings are propelled by the weight of your weapon.
Prerequisite(s): Operator Style, Str 13+, Power Attack, Base Attack Bonus +3.
When in Operator Style, you can make a Weighted Strike as an Attack action or as part of a charge. When doing so, you can add half of the base weight of your weapon as a circumstance bonus (maximum of +10) to your damage rolls but suffer a penalty to the attack roll equal to the bonus gained. Whether the attack misses or not, you suffer a -2 penalty to AC until the start of your next turn.