Your mixture of close-range combat with the reach of a whip proves a deadly combination.

Prerequisite: Demon Technique, Greater Whip Mastery, Two-Weapon Fighting, Weapon Focus (whip), Whip Mastery, base attack bonus +9

Benefit: When you score a critical hit with a whip, you can immediately attempt a grapple check using the whip (as described in Greater Whip Mastery) without provoking an attack of opportunity.

If you successfully grapple a creature using a whip, you can draw your foe into a square adjacent to you while maintaining the grapple. This does not provoke an attack of opportunity. You also gain a +2 bonus on combat maneuver checks to make or maintain a grapple with a whip.

Normal: Pulling a creature you have grappled with a whip using Greater Whip Mastery provokes an attack of opportunity.