Rengar passive rework idea (Bonetooth Necklace)

I think in addition to the Bonetooth Necklace, it would be cool to have Rengar have the eye he lost as a trophy, because it would be pretty weird if he just stuck his eye in there. Actually, I think Riot could make that into something cool but my idea was at 20 stacks or whatever or maybe for The Hunt against Kha'Zix, he gets his eye back and he gets bonus effects from it. Right now in The Hunt, Rengar maxes out in his trophies, but most Rengar's should have already maxed out by late game. Kha'Zix gets an upgrade on his ability though... Rengar is losing out on the deal. I think this is a good idea because:

1. It gives more connection to his lore
2. It gives Rengar players something more to achieve throughout the game
3. Makes The Hunt a little more rewarding for Rengar; a reward that cannot be achieved in a regular game