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.
Although many people think of Evelynn as a champion who isn't great, she can actually be one of the most deadly assassins in League of Legends. This build focuses on skill/item nukes, so good farming is a must!
-Unfair nuking potential
-Great farming with Hate Spike
-Low cooldowns on your best abilities
-Oracles and Wards are not your friends
-Horrible ultimate, it could have been a lot better. Health is always nice, but your stealth will get you out of sticky situations.
To start, get Boots of Speed and two health potions. If you think you'll need it, grab a mana potion as well. Once you get to your lane, stealth immediately and check out the bushes on the edge of the map. If only one champion is in there, attack once and run away. Your attacks coming out of stealth will stun your target for one second, and you can use this to your advantage by getting some early hits on the enemy. If both champions are in the bushes, tell your team who they are. One of your responsibilities as a stealth champion is doing some scouting, because you can't be seen. Once minions start to come, farm as best as you can, getting last hits and occasionally harassing the enemy champions with your Shadow Walk/Ravage combo. This will suck at your mana, however, so make sure you always have enough to stealth in case someone comes to gank you. Once you reach about 1500 gold, port back to base and do some shopping. Get Sorcerer's Shoes, and start building your Hextech Gunblade. This item has a great active, dealing 300 damage, which will benefit your nuking damage. Once you reach about level 8, start stealthing and ganking people with your Shadow Walk/Ravage/Gunblade. If you attack someone like ashe with this, and she is lower lever than you, it is a likely kill. If they survive your nuke, hit them with Ignite and a few auto-attacks.
Now you should have enough to buy (or start buying) your Deathfire Grasp. This item's active is even better than the Gunblade's, dealing more damage. If you use all of your attacks on someone, it is a guaranteed kill. At this point, you should be the strongest player in the game. Continue farming at all times, using Hate Spike for larger waves.
Unfortunately, unless you have been fed all game, the last part of the game is where Evelynn's effectiveness starts to dim. Most of the opposing team's squishy characters will probably buy magic resist items, to save themselves from your insane nuke. Try to support your team as best you can, and always ravage low health champions. It's a free kill, because they can't see you.
Things to remember:
-Turrets can always see you, so think twice about turret diving!
-Don't 1v1 tanks. Seriously don't even try it :)
-Always pop exhaust/ignite on insane dps like Yi, Jax, and Tryndamere, because they will roll you no matter what without some sort of blind.
Thanks for reading, and please rate! This is my first build, so I'm just showing you what works the best for me.