Talk:Armor penetration/@comment-114.77.203.242-20110722020021/@comment-66.250.141.150-20110722185848

No. That's not at all correct. Armor Penetration cannot take a target below 0 armor...so all of that armor pen would only reduce poor Heimer's armor to 0...not to any negative number. If the aforementioned Nasus had a Stark's and a Black Cleaver and stacked the Cleaver on Heimer 3 times, he'd achieve 65 armor reduction which would put Heimer ever so slightly negative.

The only other ways to get people negative are with Stark's + Cleaver and some of the Champ's abilities (listed above on this very page).

During the last second of Trundle's ult (50% reduced armor), if the person were taunted by Rammus (30 flat armor reduction), had 3 stacks of Black Cleaver (45 flat armor reduction), had Stark's aura on them (20 armor reduction), and had fully stacked Catling Gun on them (50 armor reduction), they would have half armor minus 145 armor...that would make the poor level 1 Heimer have -114.5 armor...and so he would take 53.38% extra damage.