Deadly Blow (Su)

At 10th level, a student of war can find weak spots where none should exist. A student of war who uses her know your enemy ability and exceeds the Knowledge check DC by 10 or more can ignore the target’s natural damage reduction and immunity to critical hits and Pathfinder Society Pathfinder Society Pathfinder Chronicles sneak attacks. This does not apply to immunities granted by spells, environmental effects, or equipment.