Rengar's update as part of Riot's 2017 Season Assassin Update changes most of his abilities and tweaks both of his passives. With the changes, The Pridestalker can now stalk his prey from a longer distance but it will be less rewarding to kill the same squishy support over and over.
Unseen Predator (Passive): Rengar's first passive remains mostly the same, allowing him to leap into combat from brush, but Ferocity now maxes out at four stacks instead of five.
Bonetooth Necklace (Passive): Trophies are now only granted for unique champion kills, and grant a permanent attack damage increase.
Savagery (Q): Instead of an on attack effect, Savagery is now a slashing attack in a half circle in front of Rengar followed by a piercing strike straight in front which generates one stack of Ferocity. If cast with four Ferocity, the damage on both attacks is increased.
Battle Roar (W): Rengar's W still deals magic damage but also now heals him for half of the damage taken "in the last few moments." With four stacks of Ferocity, Battle Roar makes Rengar briefly immune to all existing and incoming crowd control.
Thrill of the Hunt (R): Rengar's ultimate ability now lasts "significantly longer" than it used to but only allows him to see the nearest enemy champion (albeit even if they are very far away). The big difference is the ability to leap to the enemy champion revealed by Thrill of the Hunt, landing a guaranteed crit.
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Annabelle "Abelle" Fischer is a writer for theScore esports with a love for Dota 2, birds and cheese. You can follow her on Twitter.