Telling Blow (Ex)

At 6th level, a student of war can aim her blows at the weakest point in a studied foe’s defense, ignoring up to 5 points of damage reduction. This does not apply to damage reduction without a type (such as DR 10/—). This ability cannot be used against creatures that are immune to critical hits or otherwise lack discernible weak points. This ability stacks with the Penetrating Strike feat.