User blog comment:Care Level/Let's Nerf Riven... properly./@comment-5001455-20131229091637/@comment-5209745-20131230042431

Not having mana is as good as bad. Sure, she can be annoying with no mana cost. Until some time ago, she was also "unable" to build Banshee's veil. See my point?

And never underestimate the Muramana. Just because you don't see in pro plays (And as such, the sheep don't build it) doesn't means that the thing doesn't hits like a truck, and Riven's kit would easily build the Tear. BAM, everybody builds it again.

Last, but not least, congratulations, you've given Riven mana, now she gets all her armor and CDR from Frozen heart, wich also solves any mana problem you pretended to make, thus turning her in the same character but with the chance to build CDR out of her defenses. Yay!