Your anatomical insight adds deadliness to your shots.
Benefit: As a standard action, you may make an attack with a bow or crossbow and add your Intelligence modifier on the damage roll. You must be within 30 feet of your target to deal this extra damage. Creatures immune to critical hits and sneak attacks are immune to this extra damage.
Special: Starting at 2nd level, a ranger with the archery combat style may select Focused Shot as a combat style feat.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.