Needs review
Source: Way of the Ninja

Description: Such pretty eyes...

Prerequisites: Void Use, Base Attack Bonus +7, Sneak Attack +4d6, Weapon Focus (any slashing or piercing weapon)

If you make a critical hit against an opponent, you may spend a Void Point to leave them staggered (may take a single move action or standard action each round (but not both, nor can she take full-round actions)), for a number of rounds equal to the critical multiplier of your weapon. You must use a weapon which you have taken the Weapon Focus feat to use this feat.