Elven Battle Style (Combat, Style)Source Weapon Master's Handbook pg. 12
You wield traditional elven weapons with grace.
Prerequisites: Elven Battle TrainingARG, Weapon Finesse, base attack bonus +1, weapon familiarity racial trait.
Benefit: While wielding a longsword, a rapier, or any melee weapon that has “elven” in its name, combat maneuver checks attempted with that weapon as attacks of opportunity don’t themselves provoke attacks of opportunity.