Talk:Fiendish Codex/@comment-4937115-20130715044415/@comment-24947613-20140919051149

MPen is supposed to be a rare stat. Rito can't just give it to all AP items that build from FC, or they'll have to buff all MR items / give ranged champs MR/lv, which will destroy the whole point of MPen. And you don't have to upgrade it, just sell it lategame for Voidstaff.