User blog comment:Purebreaker/Crona, The Idol of Destruction/@comment-5224716-20140808150242

Too OP, especially passive and ultimate. If you want to keep the passive as it is, at least make the cooldown longer. 60 second is WAY too short for something so good. And I'd lower the health % to maybe 15/20/25/30 or something like that.

Her ult seems like a combine of Ziggs ult (amazing waveclear) and Karthus ult (global damage to all enemy units). It's seriously too strong.

Also, as someone mentioned, with this passive, even at a longer cooldown, IE would be broken as fuck on her.