UNIQUE Passive - Mementos of the Hunt: Rengar collects trophies when killing Champions and gains bonus effects based on how many trophies he has. Kills and assists grant 1 trophy.
3 Trophies: Rengar gains 25 Movement Speed whilst out of combat or in brush.
6 Trophies: Increases the range of Rengar's Leap by 125.
12 Trophies: Thrill of the Hunt's duration is increased by 5 seconds.
20 Trophies: Thrill of the Hunt's Movement Speed while stealthed is doubled.