Right now I am coding it. I have the cloak finished and basically you can set how many times he can cloak before it gets put on cooldown.
But I have a question. I was thinking that you can jump like normal height, but when you crouch you can jump a lot higher. Should I make it like that? Or should I make it so it always jumps really high?
Also I am not amazing at effects, and if someone wants to make some effects for Kha'Zix's ability's, that would be great! If not I can always spent a few hours on trying to make it look decent.
-edit-
I think I have the jumping system stated above done... Haven't tested it yet. It can easily be removed if that isn't how you want it.
Another question. Should I make it check if something is evolved? If it is than make it how it would be evolved in game? Make it so you jump is smaller if it's not evolved. And if cloak is evolved than you would get 3 cloaks. Same with Void Spike being that if it's evolved than it would shoot 3 of them. If so there is multiple ways I could make them evolve, as in how they gain the evolution point. It's up to you.
I will continue to write some stuff up until you answer and change according to what you think.