Talk:Xerath/@comment-4012115-20111005155639/@comment-4434378-20111005193205

False, reduction comes before penetration. Basically against a 100MR target, 20MPen would mean the target now has 56MR while Locus is on, while with Void Staff they would only have 42 MR. On Dominion w/ Void Staff you ignore a full 60% of MR, good since most people build tanky there.