Talk:Magic penetration/@comment-72.227.184.9-20110709022956/@comment-3486816-20110712082512

penetration will never reduce resistance below 0. Because of this (and because of the order in which pen/red is applied), you need to rely entirely on sources of armor or mr reduction to get resistances below 0; penetration will never help with that cause, and will be useless at any point past it.