Talk:Vayne/@comment-9132387-20130914172249/@comment-5266525-20130920235934

"Well, how does one make an item that is already a counter to armor even more of a counter without making it do good damage to people that are not truly stacking armor?"

Someone in the thread Morello revealed his insight to suggested that Last Whisper's penetration only be effective against BONUS armor, not base, to which Morello replied (paraphrased), "Yes, something like that."

Key to the issue is that a guy with a lot of armor does not necessarily mean he is stacking it.