Whip Mastery

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.

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.