Ok, so I tried the new Cassiopeia for the first time. Here's how it went.
For like, 40 minutes, I felt I did no damage whatsoever, I felt I was healing Riven with my Poison, it was so dumb
I never felt as useless as I did, despite almost never missing my Q and spamming my E. The sole reason why we didn't lose by then was because our Draven was fed as fuck as could nearly 1 shot everyone in the entire enemy team with an Axe Crit.
After I reached 400 stacks, had Rabadonns and a L.Torment, I literally walked up to Riven and Blitzcrank(had lost hope at that point), Ulted them, pressed Q and E 3 times, instantly murdered Riven and Blitz survived because of his Mana shield.
Seriously
WTF IS THIS?
When these guys were the top dogs, making the lane probably the most frightening position since you could lose a lane and end up feeding a tanky carry that could do better than an ADC at carrying and killing. (Renekton the other way around, killed early game, but became a Super Tank late game)