I'm new to this site and don't know how to do anything so I will just give you tips on how to use Rengar.

Rengar's passive I one of the coolest passives I've played with it has so many ways to evade and attack. If you're getting chased go Into a bush and jump on to an enemy minion that is in your range and to your turret. When you're pushing or playing aggressive His bush attack will let you catch up with them and get the kill Rengar's passive is what makes him OP in early game mid game and late name.