You keep a small blade up your sleeve and when you are disarmed, you quickly draw it and attack your opponent.
Benefit: When you are disarmed of a light or one-handed piercing weapon, as an immediate action you can draw a light piercing weapon which you have concealed on your person using the Stealth skill and make an attack against the opponent that disarmed you. This attack denies the opponent of its Dexterity bonus to Armor Class. In addition, when you draw a light or one-handed piercing weapon for the first time in combat, you gain a +2 bonus to the next attack roll you make within 1 round of drawing the weapon.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.