Talk:Armor Penetration/@comment-94.146.37.38-20100913170956/@comment-3067750-20101102104132

Black Cleaver's debuff gives Armor Reduction, so it Applies After % Armor Penetration.

Flat Armor Penetration -> Percent Armor Penetration -> Flat Armor Reduction -> (There is no % Armor Reduction, but it would likely be applied after Flat Armor Reduction following the same pattern)