Cornugon Trip

Combat

You can throw your spiked chain to make trip attacks.

Prerequisite: Dex 15, Improved Trip, Weapon Focus (spiked chain).

Benefit: You may throw your spiked chain (as if it were a thrown weapon with a range increment of 10 feet) and can make trip attacks when throwing it. Failing at this attack does not knock you prone.

Source: Cheliax, Empire of Devils