First of all,
My name is xGuido and I'm a player on the EU West servers. This will be my first build I will ever make, but I'm trying to get it as detailled as possible! Remember, this build is only a guideline which means that I'm not responsible for your elo. Ok that was a horrible joke. LET'S GET TO THA BUILD YO.

Kha'Zix is a melee assassin that uses leaps and stealth and slows to get to his enemy. Once you get to the enemy, it's time to unleash tons of damage in his face. Let's start with the lore of Kha'Zix the Voidreaver.

The lore






According to the lore, Rengar is Kha'Zix rival. I played versus 3 Rengars so far, and currently I have defeated every single one of them!

Pros
-Very strong early and late game
-Able to choose 3 evolutions for your play style
-Some sustain thanks to W heal
-His hobby is eating yordles

Cons
-If you get CC'ed you're done


If played correctly, Kha'Zix is a BEAST. Actually he already is a beast but you minions got the joke. Right? Nevermind ...

I use standard AD offtank runes, with movement speed quintessences!

9x Greater Mark of Attack Damage
9x Greater Seal of Armor
9x Greater Glyph of Magic Resist
3x Greater Quintessence of Movement Speed

This is the rune page that gives me the best results with Kha'Zix!

The masteries explain themselves. You are an assassin who is focussing on murdering his targets with quick actions. Attack Damage is number 1 must-have for this, so it should be a waste to get tanky masteries. Nuff said

Kha'Zix has some neat abilties that allow im to crush his opponents fast, and when done correctly, with a minimum loss of HP. And ofcourse his evolution system!

Evolution? Whut?
Kha'Zix is able to evolve 1 of his abilities every time he ranks up his ultimate. You can only rank up your ultimate 3 times, so that means you can only choose 3 from the 4 evolutions.

Passive
Unseen Threat


His Q
Taste Their Fear
Evolved Enlarged Claws

His W
Void Spike
Evolved Spike Racks


His E
Leap
Evolved Wings


His R
[Void Assault
[Evolved Active Camouflage

The evolutions give you major ability changes, + they make you look more cooler!
For evolution points, I usually go for Q > R > E, because the W is meh. We don't need that spell alot!

The best combo. I usually E on top of my target, hit a basic attack to proc the passive, do Q, go stealth, basic attack, stealth, basic attack + Q,, go stealth again and hit another basic attack. Usually this should kill your enemy! If he/she is for example a ad carry with almost minumum armor, you should hit 1/3rd of their hp with 1 Q.

Here I will explain the used items for this build!

I recommend you to always start with Boots and 3x [Health Potion]]
This movement is very nice, especially combined with the movement speed quintessences. This gives you mobility, and the health potions allow you to stay in lane for a longer time!

On your first recall, buy The Brutalizer. I don't need to explain why you are getting the brutalizer. This item is a beast on certain champions, and Kha'Zix is one of them!

Second pair of boots.
These boots are really dependant on your play style, and on the composition of the enemy team!

3 best choices:
Mobility Boots
Now why these boots? Sometimes I feel really slow when Im roaming through different lanes, and these boots really help you. Also when trying to sneak up on a ad carry who has fallen behind or ran 10km in front of his team!

Ninja Tabi
When you're facing versus a damaging/harassing ad offtank in your lane, these boots are an excellent choice. 10% damage reduction is alot!

Mercury Threads
This is also a very handy pair of boots. When you are facing a team that has alot of annoying CC, buy these babies!

After this I usually go for
Giant's Belt which I build into a Frozen Mallet later on. The belt gives you some needed HP, and the frozen mallet wont let your enemies just walk away from you! THERE IS NO ESCAPE. Oh and if you got the Frozen Mallet, save your money to buy Youmuu's Ghostblade!

Now here you have to look on how you and the enemy are doing at the momemt. But I advise you to buy both, but buy the item that you need the most!
Maw of Malmortius
Excellent item when you are getting some magical damage. It has AD, and Magic Resistance and not to forget: it's passive that gives you a shield that blocks 400 magical damage.

Bloodthirster
If you are getting fed, and have no problem in surviving teamfights, buy this item for moar attack damage! 60 AD is a nice extra!

Now for the last item.
Last Whisper
You can really take anything you desire here. Usually the enemy team starts stacking armor. Kha'Zix no like armor. Kha'Zix buy armor penetration. Nuff said.

If you made it till here, congratulations! You are now a Kha'Zix monster player. Get ready to kick some Rengar!

I will constantly update this build, for example when items are getting buffed/nerfed and other changes aswell!

PEACE