Deep Impact

Choose one type of weapon. You can also choose unarmed strike or grapple as your weapon for the purposes of this feat.

Prerequisites: Weapon Focus with selected weapon, Weapon Specialization with the selected weapon, base attack bonus +15, Critical Focus

Benefit: Your critical hit multiplier increases by 1 for your selected weapon. i.e. x2 becomes x3, x3 becomes x4, and so on.