PFSRD:Improved Whip Mastery
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Improved Whip Mastery (Combat)
You are able to entangle opponents with the coils of your whip.
Benefit: While wielding a whip, you threaten the area of your natural reach plus 5 feet. You can also use a whip to grasp an unattended Small or Tiny object within your whip's reach and pull that object into your square. To do so, you must hit AC 10 with a melee touch attack. Further, you can use the whip to grasp onto an object within your whip's reach, using 5 feet of your whip as if it were a grappling hook, allowing you to use the rest of your whip to swing on like a rope. As a free action, you can release the object your whip is grasping, but you cannot use the whip to attack while the whip is grasping an object.