Whip Mastery (Combat)Modifier
Your superior expertise with this weapon does not provoke attacks of opportunity from your enemies.
Prerequisites: Weapon Focus (whip), base attack bonus +2.
Benefit: You no longer provoke attacks of opportunity when attacking with a whip. You can deal lethal damage with a whip, although you can still deal nonlethal damage when you want. Further, you can deal damage with a whip despite a creature's armor bonus or natural armor bonus. You can also choose to deal Piercing damage instead of Slashing.
Essentia: You can Deal +2 Non-lethal Damage / Essentia with each Whip attacks
Normal: Attacking with a whip provokes attacks of opportunity as if you used a ranged weapon. A whip deals no damage to a creature that has an armor bonus of +1 or natural armor bonus of +3.