User blog comment:Leyrann/Why Chalice of Harmony is OP/@comment-5194571-20120827200804/@comment-4834593-20120828061911

As you say, you don't play top. That means you don't know how strong it is there. And it's that strong, because top laners normally don't build mana regen, which means that they are oom very fast if they don't have a Chalice to avoid it. I mean, I don't often see mages who don't either build Chalice, or some Doran's Rings, plus they normally use runes and masteries with mana regen. Top laners can't afford those other things.