User blog comment:Kashicorn/THAT'S NOT RIGHT./@comment-5710639-20130411203219/@comment-6301771-20130412154823

^ That and back in the old day, EVERYTHING scaled on AP. Look at all of Tristana's skills. Why would an AD carrie's ult scale on AP? Because back in the day, during initial development, AP was the only thing that effected abilities.