Riptide Attack (Combat)Source Inner Sea Gods pg. 215 (Amazon), Faiths of Balance pg. 24 (Amazon)
You can immediately drag opponents you successfully trip.
Prerequisites: Improved DragAPG, Improved Trip, worshiper of Gozreh.
Benefit: Whenever you succeed at a trip combat maneuver, you can automatically attempt a drag combat maneuver against your tripped target as a swift action.Source Weapon Master's Handbook pg. 25 (Amazon)
By spending 4 stamina points, you can attempt a dragAPG combat maneuver check against any opponent that you successfully trip using Riptide Attack as a free action instead of a swift action.