I want out to start by saying THIS IS A TREELINE BUILD. You can go ahead and try it on Rift, but don't complain if it doesn't work for you. Anyways, Nocturne is an amazing champion. He excels at ganking and chasing, and is pretty decent at escaping as well. He is personally my favorite assassin, even after some of his buffs. With practice, I think he is one of the best 1v1 champions out there.

I take the runes pretty standard for a Melee DPS. Armor penetration is useful throughout the whole game, and the magic resist and armor is definitely needed on a squishy like Nocturne during his early game.

The same applies for the mastery choices. Personally I enjoy that early bit of armor and magic resist early game, so I take 9 points in defense. The 21 in offense are ones you would typically get for a physical damage dealer.

You might be wondering why I start out with boots. I see a lot of Nocturnes start out with Doran's blade, and although it is a good starting item, it just doesn't do it for me. Boots not only allow you to reach the bush first, but you can also catch up when the enemy flashes away, usually netting 1-2 kills.

I don't get damage items for a while, and that's because I simply find that Nocturne isn't so dependent on them. He already has an attack damage buff from Duskbringer, and your attack speed paired with Unspeakable Horror should leave you pretty comfortable farming and 1v1ing.

The critical strike factor plays a large part in the items I get. With this build, you'll have 100% critical strike. And thanks to Infinity edge, you do an extra 50% damage with every critical strike. That means, instead of doing 300 damage per hit, you'll do 750. And with the armor penetration from runes and Ghostblade, combined with you're crazy attack speed, you should have no problem finishing someone off.

Finally, you probably think I'm crazy for building glass cannon. It really depends on the situation. If the enemy team has a lot of CC, I'll usually trade Ghostblade for a Banshee's Veil or a Frozen Mallet, or Berserker's Greaves for Mercury's Treads. It's really up to what you feel would work best, depending on the situation.

Pros:
-Great Jungler
-Good gap closer
-Destroys in 1v1 fights
-Paranoia and Duskbringer allow easy ganks
-Looks totally BA


Cons:
-Squishy
-Moderately long cooldown on your defensive ability
-Can have trouble fighting more than one champ at a time

Umbra Blades (passive): This ability is often underestimated. Auto-attacks refresh its cooldown, and the lifesteal gives you decent lane sustane. The extra damage is nice too.

Duskbringer: Nocturne's bread and butter. This is does a nice amount of damage, and it can be used to poke at enemies during laning. The best part about this move though is the trail. It grants Nocturne a nice amount of additional damage and movement. If it hits a champion, they leave a trail behind them as well, which lets you chase them down quite nicely, or at least get them in range for a fear.

Shroud of Darkness: I use to think this ability wasn't all it was cracked up to be. However, the passive attack speed it grants is definitely useful. The spell shield too, now everytime Lux tries to snare you, not only do you block it, but you just doubled your attack speed buff. Time to get mad.

Unspeakable Horror: This is Noc's only ability that stacks with AP. Please don't go AP Nocturne. This doesn't do a ton of damage, but it's a fantastic gap closer, not to mention the fact that it scares the living **** out of your enemies. If I had a penny for every flash that's been used trying to escape this.

Paranoia: Nocturne's signature move. It turns the screen dark and actually does make you a little paranoid. Use it to join fights, gank enemies, or catch up to that Tristana who think she's getting away. Don't hesitate to use this ability even when you can't use the leap however, often it will scare and confuse the enemy team and cause them to make a mistake.

Attacking: Q > E > W > SLASHSLASHSLASH
Blocking: W > Q > E > SLASHSLASHSLASH
Ganking: R > E > Q > W > SLASHSLASHSLASH
Running: E > Q > W > Ghost
Pretending: W > Turn around > Q > E > SLASHSLASHSLASH

Farming with Nocturne is fairly straight forward, the only tip I'd give is to use Duskbringer when the minions are still in a line, so you can hit most or all of them at once. Don't forget the trail gives you an attack damage buff, and Umbra Blades will help you make short work of the creeps. Noc is insane at farming late game. Umbra Blades can crit. Muahahahaha.

Well there you have it. I hope this, my first guide, helps you become a better player. I'm always open to hearing suggestions and opinions on how I can improve this guide, or as a player personally. Be sure to rate and comment. :)