Talk:Miss Fortune/@comment-87.203.103.84-20120530150704/@comment-4922088-20120602013858

"The target's armor is treated as being reduced by an amount for purposes of damage calculation, but cannot be reduced below 0. Flat armor penetration stacks additively."

No Armor pen can not reduce armor below 0 it can only take it down to 0, you have to shred armor in order to get it into the negatives. The same goes for Magic pen and Magic shred