Talk:Armor penetration/@comment-77.161.253.169-20111011044954/@comment-67.136.213.242-20111014203039

Armor Pen will make you penetrate a target's armor stat, much like the name implies. Armor reduces physical damage and not any other type. So regardless of what the skill you're using scales with (Be it AD or AP) it will only benefit from a Penetration stat IF it deals the correct damage-type: True, Magic, or Physical. Which is listed on the skill's tooltip.