Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Well I just bought Nocturne a few days ago and didn't see that he had a decent build so here is how I play Nocturne. Nocturne is a ganker by nature, so with this in mind I play him just like I would play Master Yi. Early on make sure that you are playing smart he is rather squishy. Always go in for the easy kills and get as much money as you can as fast as possible. With his passive granting you life you can stay in lane a bit longer than most champs which will help your team a lot. Your Ultimate is beast just as long as you know how to use it. It is especially good for ganking even if you are not the one going for the kill. You can use it to hide your teams movements so even if you are top and the gank is going mid or bot still use it to help your team out. This is my first guide and I am still figuring out how to play Nocturne but this is how I feel he should be played. Leave a comment and rate as you will let me know if this guide is missing items or whatever. I will be making this more in depth at a later date TY!
I chose Exhaust and Flash.
Exhaust so you can slow that enemy down that always seems to be getting away for the kill.
Flash so you can catch up to fleeing enemies and also for you to get away in case you get into a sticky situation.