You have been specially trained to wield a weapon you have a Weapon Focus with.
Prerequisite(s): Base attack bonus +1, martial background racial trait, elvaan.
BENEFIT
You have received special training with the weapon that you have a Weapon Focus feat with. You receive a +2 bonus to your CMD against disarm and sunder maneuvers directed at one of these weapons you are wielding. In addition, if you are wielding one of these melee weapons, you may make an additional attack of opportunity each round (this bonus stacks with Combat Reflexes).