New patch

New patch is out after a certain delay (on Europe atleast). New patch means new champion.
Here are the patch notes.

PVP.net v1.31.27

• Made several usability improvements to the Join Custom Game screen
• Private games are now hidden by default. There's a new checkbox to show them
• Made improvements to the Login Queue UI
• Login Music checkbox now saves correctly between sessions
• The player list in the end of game screen will now correctly always show all of your teammates
• The "View Profile" button in personal messages now works correctly
• Fixed several bugs with viewing runepages when a match is found that was causing bad behavior

League of Legends v1.0.0.113
Nocturne, the Eternal Nightmare

• Duskbringer: Nocturne throws a shadow blade which deals damage, leaves a Dusk Trail, and causes champions to leave a Dusk Trail. While on the trail, Nocturne ignores unit collision and has increased Movement Speed and Attack Damage.
• Shroud of Darkness: Nocturne empowers his blades, passively gaining attack speed. Activating Shroud of Darkness allows Nocturne to fade into the shadows, creating a magical barrier which blocks a single enemy spell and doubles his passive attack speed if successful.
• Unspeakable Horror: Nocturne plants a nightmare into his target's mind, dealing damage each second and fearing the target if they do not get out of range by the end of the duration.
• Paranoia (Ultimate): Nocturne reduces the sight radius of all enemy champions and removes their ally vision in the process. He can then launch himself at a nearby enemy champion.
• Umbra Blades (Passive): Every 10 seconds, Nocturne's next attack strikes surrounding enemies for physical damage and heals himself for each target hit. Nocturne's physical attacks reduce this cooldown by 1 second.

Akali

• Adjusted Twin Disciplines to trigger at 9.5 AD and 19.5 AP to account for rounding

Anivia

• Glacial Storm mana cost reduced to 75 at all ranks from 75/125/175
• Updated all of Anivia's animations to be less frigid

Caitlyn

• Headshot now requires 8/7/6 attacks to trigger at level 1/7/13 respectively from 8 attacks at all levels

Cho'Gath

• Feral Scream damage reduced to 75/125/175/225/275 from 80/130/180/240/300
• Vorpal Spikes
  • Damage increased to 20/35/50/65/80 from 20/30/40/50/60
  • Ability power ratio increased to .3 from .2
• Feast
  • Damage reduced to 300/475/650 from 300/550/800.
  • Ability power ratio increased to .7 from .5
• Carnivore mana received on kill has been reduced by 50%
• Base health reduced to 520 from 550
• Base armor reduced to 19 from 21

Evelynn

• Fixed a bug where Hate Spike's tooltip showed the damage incorrectly at earlier ranks

Galio

• Righteous Gust mana cost reduced to 70/75/80/85/90 from 80/85/90/95/100

Gragas

• Barrel Roll damage reduced to 85/135/185/235/285 from 100/150/200/250/300
• Drunken Rage mana restored while channeling reduced to 30/45/60/75/90 from 40/55/70/85/100

Irelia

• Equilibrium Strike
  • Damage reduced to 80/130/180/230/280 from 80/135/190/245/300
  • Cooldown reduced to 8 seconds from 9
  • Ability ratio reduced to .5 from 1
• Transcendent Blades damage reduced to 85/135/185 from 90/140/190
• Base health reduced to 515 from 575
• Movement speed reduced to 320 from 330

Jarvan IV

• Golden Aegis' PVP.net description no longer states it triggers automatically

Kassadin

• Force Pulse
  • Damage reduced to 60/115/170/225/280 from 60/120/180/240/300
  • Cooldown increased to 6 seconds from 5
  • Ability power ratio reduced to .7 from .8
• Riftwalk ability power ratio increased to .5 from .4
• Void Stone damage reduction reduced to 10% from 15%

Lux

• Prismatic Barrier shield increased to 60/85/110/135/160 from 50/75/100/125/150
• Finales Funkeln ability power ratio reduced to .75 from .85

Malphite

• Granite Shield Increased the re-use time of your shield reactivating upon taking damage to 12 seconds from 8.
• Ground Slam bonus damage based on armor decreased to 50% from 70%

Maokai

• Arcane Smash damage increased to 70/115/160/205/250 from 50/95/140/185/230
• Twisted Advance damage increased to 80/115/150/185/220 from 80/110/140/170/200
• Sapling Toss lifetime increased to 35 from 25 seconds.
• Vengeful Maelstrom
  • Casting delay reduced by 50%
  • Initial mana cost changed to a static 75 from 75/125/175
  • Continual mana cost changed to a static 30 from 30/35/40 per second

Mordekaiser

• Fixed a bug where Mordekaiser's per-level health, armor, attack speed, damage, and magic resist were lower than intended

Singed

• Armor per level decreased to 3.5 from 4.2

Sion

• Death's Caress damage and shield reduced to 100/150/200/250/300 from 110/160/210/260/310
• Base health reduced to 507 from 577
• Base health regeneration decreased to 1.58 per 5 seconds from 1.62
• Health regeneration per level reduced to 0.19 from .2

Sivir

• Fixed a bug where Fleet of Foot had stopped working

Sona

• Power Chord now deals 14 damage + 9 x lvl (from 24 + 12x bonus magic damage) in bonus magic and a bonus effect depending on Sona's last song played.
• Hymn of Valor
  • Base damage reduced to 50/100/150/200/250 from 60/110/160/210/260
  • Ability power ratio increased to .7 from .5
  • Mana cost changed to 75 from 65/70/75/80/85
  • Power Chord - Stacatto: Deals double power chord damage
• Aria of Perseverance
  • Base heal increased to 35/70/105/140/175 from 30/55/80/105/130
  • Ability power ratio reduced to .35 from .5
  • Mana cost normalized to 75 from 65/70/75/80/85
  • Power Chord - Diminuendo: Debuffs the target to deal 20% less damage for 3 seconds
• Song of Celerity
  • Mana cost changed to 75 from 65/70/75/80/85
  • Power Chord - Tempo: Slows the target by 25% for 2 seconds
• Crescendo
  • Cooldown decreased to 140/120/100 from 170/150/130
  • Ability power ratio increased to .8 from .7

Veigar

• Added a funky new dance for Veigar - rock on!

Zilean

• Time Bomb
  • Mana cost increased to 70/85/100/115/130 from 60/75/90/105/120
  • Base damage reduced to 90/145/200/260/320 from 100/155/210/270/330
• Chrono Shift
  • Base revive increased to 600/850/1100 from 500/750/1000
  • Ability power ratio reduced to 2 from 3
  • Buff duration reduced to 7 from 10

Items

• Banshee's Veil refresh time increased to 45 seconds from 30 seconds.
• Doran's Blade
  • Fixed a bug where Doran's Blade was providing an unintended effect
  • Damage increased to 10 from 9

General

• Experience
  • When more than 1 champion is sharing experience, 10% extra experience is split among all targets
  • Two champions each gain 55%, up from 50%
  • Three champions each gain 36.7%, up from 33.3%
  • Four champions each gain 27.5%, up from 25%
  • Five champions each gain 22%, up from 20%
• Death timers increased slightly for levels 4-17
• Minions
  • Cannon and super minion turret resistance returned to 50% from 65%
  • Minions now deal 50% damage to turrets from 60%
  • Cannon minions now start spawning every other wave after every 35 minutes, increased from 20
• Effects that prevent you from dying will now always occur in a set order
  • Undying Rage
  • Chronoshift
  • Guardian Angel
  • Rebirth

Going to write a review on Nocturn when I get some more impressions. Right now I feel like he's pretty strong jungler, decent solo laner (unless put against some imba harassers). Feels somewhat a bit overpowered due to his ganking with his ulti, Q and E. Anyways - more on him in a few days. Other then new champion there weren't any huge changes this patch.