Remove Nocturne from Ascension Mode, or alter his Ult to fit it
It's one thing if you're getting overpowered by Xin Zhao or Jax, or an ascended Fizz; it's another when your team is prevented from targeting or even seeing Xerath and then seeing that your opponents got ascended instead. Because now those last-millisecond clutch moves with your AAs and target abilities now go down the drain, and pretty much nothing but a lucky LeBlanc blink will counter it. Or perhaps they could remove it so that you can still see Xerath, but your sight of everything else will still be removed. It should make sense, considering you're always revealed in Ascended Form, whether by either Passives or abilities.