Hi! I'm Plasdfl and this is my guide for how to have fun with Kha'Zix. This is my first guide so sorry if some things are messed up. I am currently in Gold II on the NA servers and I hope you have fun with these builds :).

PLEASE NOTE: DO NOT TRY THIS IN RANKED UNLESS YOU AREN'T AFRAID TO LOSE AND YOU FEEL THAT YOU'VE MASTERED THIS COMPLETELY. THIS GUIDE IS MEANT FOR PLAYERS TO HAVE FUN AND IS NOT (that) SERIOUS.

So you might be wondering what the heck is this troll build. Well hear me out: I felt that Kha'Zix was too boring to play and decided to take advantage of his high base damage and dueling power to build new items on him and use this strengths in a different way. Each build has its on strengths and weaknesses, but all still work perfectly fine.

The 20% CDR lets you spam your abilities more often (speicifically your W, the void spikes), and the AP lets your W heal you for more (hence the name sustained Kha'Zix where you can heal pretty often). Also, the passive bonus damage after being unseen by the opponent scales off of AP as well.
While not the best, it certainly is viable.

Tank meta, dude.

It works nicely with the on-hit passive of BORK, and it good for those people who like to farm all day on their junglers.

Well, it is clearly the most op item on Summoner's Rift right now with the removal of DFG because it adds burst and extra dueling power to your kit. It also slows the opponent so it is easier to chase them down.

You get the global map pressure and it is useful for split pushing/getting out of sticky situations (you can use it to TP to a base tower, which is like a 4-second recall that can only be stopped by CC).