User blog comment:Zilla4444/AP Version of Black Cleaver/@comment-82.75.130.183-20120611175125

I like the idea, but i feel only Ryze Cass and Kennen would benefit from such a passive; because they can spam there spells.

However Ryze doesn't need the extra CDR and it offers no mana or defense stats.

Kennen also better can get items with both def (or sv) and AP.

Also it is an endgame item, considering the cost (or mid perhaps) but by then Void Staff is usually better (and cheaper).