User blog comment:ClariS/Season 3 Item Changes/@comment-5266525-20121108152108/@comment-4022742-20121110172327

Void staff and Last whisper.... Just make the Magic Penetration work like the new Armor Penetration and both are pretty much fixed. Only Nerf the Value of penetration if they plan on making percentage penetration marks.

By the way, they plan om making Black Cleaver shred percentage armor, so I'm hoping there will be an item shredding percentage Magic resist, giving viable options to either pick shredding, percentage penetration or flat penetration.