While in this style, you hamper foes that turn their backs on you.
Benefit: While using this style, whenever you deal at least 10 points of damage to a foe with an attack of opportunity, that foe’s base speed decreases by 5 feet until the end of its next turn. For every 10 points of damage your attack deals beyond 10, the foe’s base speed decreases by an additional 5 feet. If the penalty meets or exceeds the total base speed of the foe, you can attempt to trip the foe as a free action after the attack of opportunity is resolved.
Pathfinder Roleplaying Game Ultimate Wilderness © 2017, Paizo Inc.; Authors: Alexander Augunas, John Bennett, Robert Brookes, John Compton, Dan Dillon, Steven T. Helt, Thurston Hillman, Eric Hindley, Mikko Kallio, Jason Keeley, Isabelle Lee, Jason Nelson, Stephen Radney-MacFarland, Alex Riggs, David N. Ross, David Schwartz, Mark Seifter, Jeffery Swank, and Linda Zayas-Palmer.