You are particularly good at cutting off body parts in melee.
Benefit: You do not provoke an attack of opportunity when performing a sever combat maneuver (see below). In addition, you receive a +2 bonus on checks made to sever a foe’s limb. You also receive a +2 bonus to your CMD whenever an opponent tries to sever your limb.
You can attempt to sever an arm, foot, hand, or leg at the joint as part of an attack action in place of a melee attack. Normally you cannot sever other limbs than those four extremities, but your GM may deem some special limbs fragile enough to qualify (a wing, for example).
If you do not have the Improved Sever feat, or a similar ability, attempting to sever an item provokes an attack of opportunity from the target of your maneuver. Declare which limb you are targeting before your combat maneuver roll. If your attack is successful, you sever the targeted limb. Your opponent can make a Fortitude save (DC equal to your combat maneuver roll) to ignore the effect. Although horrific, the mind blocks out the pain of losing a limb. This attack deals no damage. The penalties for losing limbs are outlined here.