User blog comment:TheTobarMethod/Do AP's Need A QSS Upgrade?/@comment-15244341-20130903131439

It may be small, but an item like this (favours mages and gives QSS passive) might make some mages weaker in lane. Think Malzahar or Morgana, the first because he does depend on his ultimate to hit someone and the latter because... she depends on CC to deal any damage.

Still, it is a great idea, i do like it quite a bit. +1