I hope everybody who is reading this guide will understand what I am writing about because my english isn't that good, but just let us start with the guide.

Why shouldn't I use magic pen. with Kha'Zix?! That's a great question, but there is a very simple answer. Early game to mid game the damage rates of your abilities are high enough to deal tons of damage without magic pen. runes. This guide is based on an AD Kha' so you will do your damage at the lategame with AD, what means that you don't need your abilities anymore at the lategame.

I think I don't have to talk about the starting items, but why should you get berserkers instead of mercurys or ninja tabis? The offensive is your defense through the bloodthirster(which I didn't even need early game). So you will get a lot of damage and with the beserkers you are able to attack much faster and getting life much faster in the fight. I often play with frozen mallet, it is a great item because it gives you life, AD and also slows the enemey you are dealing AD on. IE should also be sure. But why should I buy black ax? You should definetly buy it because you'll get more attackspeed, more dmg and you will also bring down the enemies' armor with it, 3 very important things for mid- to lategame, At the 2. defensive item you have to take a look to your enemy team. Is there more AD or AP Dmg on me?

Your main ability will be your Q skill so you will use your Ulti first on it. As second you'll choose your W skill and as third you'll use your Ulti on your Ulti to get out of too high dmg in teamfights faster.

Why the bloody hell should I take exhaust AND ignite? You can use exhaust offensive and defensive and not only to help yourself, also to help your teammates, so it is a great spell that takes flashs old place, what you won't need because of your E spell.