Master Of The Sudden Strike (Human)

The material below is Open Game Content from a 3PP Source

Master of the Sudden Strike (Human): You have mastered the deadly fighting arts of your people, and when you wield a masterwork version of any sword, you become one with its blade. If you act before your opponent during the surprise round, you gain a +2 trait bonus on weapon damage rolls for the surprise round only. This additional damage is precision damage.