User blog comment:Yashichi/Some Thoughts on Nunu + Blitzcrank/@comment-1445357-20120209084233

If you raise the mana cost on Consume, it'll hurt Nunu's laning, though. He gets less chances to build Visionary stacks in lane so that nerf to mana cost'll really hurt.. (Although you're right, jungling Nunu cares not of mana costs)