An Idea for Kha'Zix in the upcoming Assassin Update

So since I saw Kha'Zix on the list of possible candidates for the Assassin Update, I am super hyped for this upcoming update to see what Riot's got in store this time. I personally love Kha'Zix, playstyle-wise and thematically. The idea of this Void pray-mantis creature with an obscession with consuming and evolving, as well as the fact that his abilities begin to change visually for him as the game progresses. Now I do love Kha'Zix, I haven't really played him enough to make a super in-depth and honest opinion about his state, but I have always felt that Kha'Zix plays pretty well. An issue I have with him however is how his kit fits into his theme, a creature that seeks to devour creatures in order to evolve and become stronger.

In game, Kha'Zix doesn't do much devouring and more evolving, but I had an idea for an additional passive, possibly for his Q, that revolves more around that idea of 'consume and evolve' on jungle monsters. I can't really make a super deep description of it, but what if his Q gets a passive where, if he kills a jungle monster with it, he gets a buff resembling the creature, like a Pseudo-smite-buff. For instance, if he kills Kruggs with his Q, he gains a shield, or additional armor/tenacity. Or if he gets birds, he gets more movement speed or a larger distance for his E, you can get the idea. This should obviously only affect the normal jungle monsters, and not the Drakes, Rift Herald or Baron (or possibly a powerful buff when killing Baron).

Hope you guys like the idea, and feel free to point out any other issues you feel about Kha'Zix or other ideas for his rework.