Talk:Magic penetration/@comment-112.202.177.161-20120414181322/@comment-4645527-20120806161128

The biggest thing to remember is to not be so stuck to your prefered build that you forget to adjust. If Void Staff is part of your build, great. But do not get it if they arn't building any MR (unless oc you think they will be soon). Likewise, if their entire team is throwing on MR, your abyssal's MPen won't be as useful, so you may not want it.

Basically, adjusting your core build to counter the enemy team is just as important, if not more so, than your core build.