Massive teamfight engage and game winning [R] burst.
Burst damage and target access
Hitting a champion with 3 separate attacks or abilities in 2s deals bonus adaptive damage.
Deals bonus true damage to enemies with impaired movement or actions.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
Heal for a percentage of damage dealt with your abilities. Increases with each unique takedown.
Empowered abilities and resource manipulation
Shortly after using your Ultimate, gain a decaying Movement Speed increase that lasts for 3s and allows you to pass through units.
All movement Speed bonuses are 8% more effective on you.
Offense
+9% Attack Speed
Flex
+5 AD or 9 AP
Defense
+6 Armor or 8 MR (match-up)
Electrocute massively empowers your ability to deal high amounts of burst damage as Kennen to blow up your target.
Cheap Shot empowers your burst damage when you stun targets with [W] and [R] for even more kill pressure.
Eyeball collection allows you to snowball your lead when you pickup assists/kill from clutch [R]'s in teamfights.
Ravenous Hunter's empowered healing makes your lane trading highly efficient allows you to trade aggressively for lane control.
Nimbus Cloak's massive burst of movement speed allows you to dive and engage a teamfight for a game-winning [R].
Celerity's bonus AP synergizes well with the movement speed bonus from [E] as well as Nimbus Cloak.