Prerequisites: BAB +9, Dex 15, Exotic Weapon Proficiency (spiked chain), Weapon Focus (spiked chain), Combat Expertise, Chain Wrapping, Two-Weapon Fighting

Benefit: You can use your spiked chain as double weapon, and you incur all the normal attack penalties associated with fighting with two weapons, just as if you were using a one-handed weapon and a light weapon. You cannot use the spiked chain as a reach weapon while using it as a double weapon, but you may switch techniques once per round as a free action.