User blog comment:GutsyTick/Zamael/@comment-6719710-20150126094848/@comment-26044269-20150126194307

Okay. In retrospect, even with the conditions required to fully charge Zamael's Ruin I do think his damage would be a bit too absurd to call fair. I'll try to figure out a way to make his damage healthier. Maybe the scaling on Q could be changed to bonus AD and the true damage componenet on Furor could be removed, not sure right now.

However on the topic of cast times and cc invulnerablity, its always been there you know. While 'casting', not 'channeling' an ability, champions are immune to all cc except for knock-about effects. I just thought it would be cool thematically to enable a champion to take full advantage of that by being able to move while 'casting'.