You swing your weapon with uncanny speed, slicing apart a foe in the blink of an eye.
Prerequisites: Proficiency, Weapon Focus, and Weapon Specialization with selected slashing weapon; Melee Weapon Mastery (slashing), base attack bonus +14.
Benefit: When you use a standard action to attack with any slashing weapon, you can choose to make a second attack with that weapon. You take a –5 penalty on the first attack, and a –10 penalty on the second.
When you use a full attack action with any slashing weapon, you gain one additional attack at your highest base attack bonus. That attack and all other attacks you make in the current round take a –5 penalty.
Special: A fighter can select Slashing Flurry as one of his fighter bonus feats.
Source: Player’s Handbook II, page 82.