Talk:Katarina/@comment-26808509-20160725182048/@comment-26808509-20160725235655

True and usually you end up with less magicresistance than armor, but Last Whisper and Voidstaff for that matter have percentage penetration and Voidstaff is pretty boring item. It adds nothing interesting and yet most AP champs buy it, because there is no alternative. No decisions, no trade Offs.

The Last Whisper was changed because of the very same reason, because Riot wanted to add more diversity to the ADC builds, but the builds of mages are lacking of diversity aswell. The only real difference consits in tear (and manastacking Overall) or not tear.