User blog comment:Deshiba/Season 3 Armor and Armor Penetration/@comment-4012115-20121111201632/@comment-4012115-20121111201737


 * 15 Armor penetration from Marks will reduce that value down to 9 (9,375)
 * 10 Armor penetration from Black Cleaver will reduce it down to 0 (-0,625)
 * 10 Armor penetration from Quints will reduce that value down to 0 (-10,625)
 * 6 Armor penetration from Sunder will reduce that value down to 0 (-16,625)

Only armor reduction is able to bring armor below zero ...