User blog comment:Darksusanoo/Kassadin...his current state and possible rework ideas/@comment-24363589-20140917002423

There are a lot of really cool ideas in there, but I think that this kit would be too powerful as an anti-mage, making him a pure counterpick and allowing him to easily and completely destroy those that he counters. In short, being too focused on him as a counter pick leads to scenarios where the first mid-laner to pick either picks an AD assassin, picks a mage and bans kassadin, or fails to do one of these things and loses because the second midlaner gets to pick kass into a mage. In other words, he becomes a pick or ban even if he isn't particularly strong outside of his ideal scenario because of how common that scenario is.