SRD:Parrying

Parrying: A parrying weapon perceives an instant into the future, and of its own accord resists melee and ranged attacks aimed at the wielder, granting a +1 insight bonus to the wielder’s Armor Class. The weapon is so adept at parrying that it even affects incoming powers, granting the wielder a +1 insight bonus on saving throws. The bonuses are granted whenever the wielder holds the weapon, even if flat-footed.

Faint clairsentience; ML 5th; Craft Psionic Arms and Armor, defensive precognition; Price +8,000 gp.