You and your allies can work together to trip larger foes.
Benefit: If you attempt to trip a foe that is larger than you, you gain a +1 bonus on your CMB check to trip the foe as long as an ally with Topple Foe is flanking the foe with you. If multiple allies with Topple Foe are flanking the foe with you, you gain an additional +2 bonus on your CMD check for each additional ally that’s flanking the target. The bonuses granted by this feat stack with those granted by Improved Trip and Greater Trip.
Each time you attempt to trip the same foe in consecutive rounds, the bonus granted to your trip attempt increases by +1 per ally, to a maximum bonus of +4 per flanking ally on the 4th round of consecutive trip attempts.
Pathfinder Campaign Setting: Rival Guide. © 2011, Paizo Publishing, LLC. Authors: Brian Cortijo, Adam Daigle, Tim Hitchcock, Brandon Hodge, Colin McComb, Jason Nelson, Amber Scott, Neil Spicer, and Todd Stewart.