Rework Concept: Nocturne, The Living Nightmare
Nocturne, while not the most important champion to be reworked, is eventually going to need it. I've tried to keep Nocturne similar to his old kit, since thematically, I think it was very appropriate. As well, Nocturne remains as a melee assassin with the ability to build into a more bruiser-like build. The major things I have set out to do is to add more mind games to Nocturne's kit, while adding counterplay and playmaking potential. As well, I think Nocturne, as many champions, should have viable off builds, and have tried to give Nocturne viable tank/bruisers build and maybe a viable ap build.
PASSIVE: The Living Nightmare > Umbral Blades - Every 24/18/12 seconds(effected by cooldown reduction), Nocturnes Umbral Blades reform, empowering his next 3 autoattacks. The first two attacks grant Nocturne a dash that goes 350 units. The final attack deals 130% ad to the primary target, and 30% ad to all nearby targets, and heals Nocturne for 2/4/6% of his maximum health against champions, large and epic monsters, and quarter that amount against minions and small monsters. Unspeakable Horror - Nocturnes Shroud of Darkness and Dark Caressinflict champions, large and epic monsters with Building Horror. Building Horror deals 2/4/6/8...(+10% ap) magic damage every .25 seconds for 1.5 seconds. If Nocturne is withing 450 units of an enemy after 1.5 seconds of Building Horror being active on them, the target is feared for 1 second. Building Horror grants true vision of afflicted targets.
Nocturne's passive is two fold. The first part is an update to his old passive that makes it more then just aoe damage that kind of heals. The new passive grants Nocturne greater play-making potential(with his two dashes) as well as a delayed burst of damage. It also builds to his theme of inevitable terror, as you know the third attack will be coming, and all you can do is watch as Nocturne delivers it. The second part of the passive contains the spiritual successor to Nocturne's old E. It has been relegated to being part of his new passive much for the same reason of Illaoi's tentacles slamming being a part of her passive. Multiple abilities now use it and it is clearer that way. As well the ability has been kept as ap only to help ap nocturne continue to exist as a meme build. As a side note, Nocturne will have a ring around enemies who are afflicted.
Q: Duskbringer > Cooldown: 12 Nocturne fires out shadowy energy up to 1200 units away, dealing 50/100/150/200/250(+70% ad)(+60% ap) physical damage to all targets hit. The energy infects the first champion, large or epic monster hit, doubling the distance of which Nocturne can dash to them using Umbral Blades to 700 units. As well, the energy, and any infected champions or monsters, leave behind a trail for 4 seconds, on which Nocturne and move unimpaired, including through terrain.
This ability remains very similar to Nocturne's old Q, with the most major change of no longer having movespeed, but letting Nocturne move through walls. This ability doesn't work as a gap-closer unless Nocturne has his passive up, giving him obvious moments of strength and weakness. Also Nocturne should be able to go through walls, he's a ghost.
W: Shroud of Darkness >Cooldown: 25/22.5/20/17.5/15 Passive - Increase the fear length of Building Horror by .15/.3/.45/.6/.75 seconds Active - After a .5 second delay, Nocturne forms a shroud in front of him that blocks all damage that hits him from the front for one second. Enemies that attack the shroud are also afflicted with Building Horror
This ability is as straightforward as Nocturne's current W, with the added complexity that the shield doesn't form immediately, and only blocks from the front. But it now blocks all damage, and not just the first spell, and applies Nocturne's fear, letting it be used far more aggresively, and making it usable in the jungle, albeit at a long cooldown. The passive incentives you to max it early, however doing that trades utility for the damage provided by Nocturne's E and Q.
E: Dark Caress > Cooldown: 18/16/14/12/10 Nocturne releases a cloud of nightmares in a cone in front of him, afflicting enemies with Building Horror. This cloud persists for .8/.9/1/1.1/1.2 seconds, and blocks vision, while also reapplying *Building Horror every .25 seconds. If Nocturne hit an enemy with the initial cast, he will swipe as a .75 second delay, dealing 60/120/180/240/300(+50% ad)(+50% ap) physical damage in a cone equal in size to the first one.
Nocturne's new E functions kind of like his old E, as his primary tool for applying his fear. However, the cloud of fear functions as a mind game, which is something I think old Nocturne really lacked outside of his ult. The cloud, since it blocks vision, makes the opponent of Nocturne question it. Is Nocturne in there? Will I die if I walk in there? Maybe Nocturne isn't in there. Who knows. The follow up slash is a reward for Nocturne landing the first part of his E. As well, it helps set up an obvious combo for Nocturne. Q your opponent, dash using passive, E, dash again, then slash. It also helps Nocturne's jungle clear, since his passive is now has a much longer cooldown, reducing aoe damage, and this will supplement that.
R: Paranoia > Cooldown: 180/150/120 Nocturne clouds the vision of all enemies, applying nearsight to all of them. Afterwwards, this ability can be reactivated to dash to an enemy withing 2500/3500/4500 units dealing 125/250/375(+.7 ad) physical damage.
There is no way Nocturne's ult could ever change from what it is, it is simply too iconic and too fitting for his game-play narrative. The only difference is a small change in numbers, mostly to keep damage to be insane, since Nocturne has more damage in his kit with his new E.
There's my idea. I've tried to keep Nocturne similar to his current state, while giving him more counterplay, playmaking potential, and more mind games. Do note that the numbers on this are subject to change, and are not final. The point of this is not the give Nocturne a definitive new kit, but to give new ideas on what I think a good Nocturne rework would look like.