User blog comment:Willbachbakal/(Champion Rework) Cassiopeia, the Serpent's Embrace/@comment-4888212-20150728230657/@comment-1330314-20150729003237

As much as I appreciate your teachings, that Serpent's Focus mechanic makes no sense on a mage. I allowed Cass to poison enemies with her basic attacks because a) she needs a way to reliably stack her poison that shouldn't involve spammy abilities, b) she'd have to get within risky ranges of her enemy in order to make the most of her kit, and c) it offers a means of spacing out her poison ramp-up without making it too brutal or too slow. She'd survive a little better than many other mages without mana, but only about as well as, who doesn't fare well when oom. Once you get to deal magic damage over 3 seconds, you'd also be way past the laning phase, and wouldn't qualify as a lane bully (that's also why I made the passive scale the way it does).