The material below is considered Open Game Content
Single-Weapon Mastery (Barbarian)
You are a deadly opponent when armed with only a single weapon.
Prerequisite: Weapon Focus (in a weapon smaller than your size), Combat Reflexes, Dodge.
Benefit: When fighting with a weapon in one hand, with nothing in your other hand, you receive a +4 deflection bonus to your AC. As a readied action, you can attempt to catch an incoming blow with your empty hand. If your opponent makes a successful melee attack against you, you may make an immediate opposed Strength check against your opponent. If you succeed, you have caught the weapon in your free hand, suffering damage normally. You may then make an attack of opportunity against your foe, provided you did not take one against the same target in the round in which you caught the weapon. You may only catch one such weapon per round.
If you wish, each succeeding round, you may maintain your grip on your foe’s weapon, suffering half damage from the weapon automatically. Doing so requires opposed strength checks each round, until your foe releases his weapon. If successful, you gain an additional attack to your normal routine at your highest base attack modifier. While you hold your opponent’s weapon, and your opponent continues to wrest control of the weapon from you, he is flat-footed. An opponent may release the
weapon at any time.