Nocturn's Ultimate has No Counterplay.
Can we talk about how Nocturn can use a semi-global, unstoppable, unblockable, undodgeable, near instant dash to blow up anyone who isn't a tank? Even if you flash heal as he lands on you his slow + speed up combo will run you down anyway. His spellshield blocks any stun attempt and if you wait for it to expire you're already dead. The only solution is to nuke him as he lands, which isn't possible unless you're entire team jumps on him right away, which won't work if other members of his team engage first.
This isn't a thread about him being 'broken'. It's about the sheer lack of counterplay a squishy has against him just headbutting the R key every half a bloody minion wave.
don't stay alone and buy wards
because you fucked if he is fed