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The Heart of the Tempest
Release Date:April 8th, 2010
Cost:4800 BE
880 RP
Health Regen HealthRegen Mini Icon.png :535.72 (+ 0.65)
Energy Energy Mini Icon.png :200 (+ 0)
Energy Regen EnergyRegen Mini Icon.png :50 (+ 0)
Movespeed MovementSpeed Mini Icon.png :335
Attack Damage AttackDamage Mini Icon.png :50.544 (+ 3.3)
Attack Speed AttackSpeed Mini Icon.png :0.69 (+ 3.4%)
Range Range Mini Icon.png :550
Armor Armor Mini Icon.png :24.3 (+ 3.75)
Magic Resist MagicResist Mini Icon.png :30 (+ 0)


There exists an ancient order originating in the Ionian Isles dedicated to the preservation of balance. Order, chaos, light, darkness -- all things must exist in perfect harmony for such is the way of the universe. This order is known as the Kinkou and it employs a triumvirate of shadow warriors to uphold its causes in the world. Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value). is one of these shadow warriors, entrusted with the sacred duty of Coursing the Sun - tirelessly conveying the justice of the Kinkou.

Kennen was born in Bandle City and it was said that in his first living moments he bolted first from the womb and second from the midwife who delivered him. His parents had thought that he would outgrow his boundless energy, but as he matured his energy found no limits and was matched only by his unnerving speed. Despite his astonishing gifts, he remained unnoticed (or at least uncaught, as he was quite the prankster) until, on a dare, he ran straight up the great outer wall of the Placidium. When word of this feat reached Kinkou ears, Kennen was quickly and quietly brought in for an audience. He found that the role of the Heart of the Tempest suited him, frenetically delivering both the word and the punishments of the Kinkou across the realm. He now works with his fellows Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value). and Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value). to enforce the balance of Valoran. This hallowed pursuit has unsurprisingly led the triumvirate to the Fields of Justice.

"The Heart of the Tempest beats eternal...and those beaten remember eternally."


PassiveMark of the Storm  
(Innate) Kennen's abilities add Marks of the Storm to opponents which last for 6 seconds. An opponent is stunned for 1.25 second upon receiving 3 Marks of the Storm, and Kennen receives 25 energy. The stun has a diminished effect, and will only stun for approximately 0.5 seconds if applied more than once within 6 seconds.

QThundering Shuriken 
(Active) Kennen throws a charged shuriken in a line in front of him, dealing magic damage and adding a Mark of the Storm to the first opponent that it hits.
Range: 1050
Cost: / 60 / 55 / 50 / 45 / 40 Energy
Cooldown: 8 / 7 / 6 / 5 / 4 seconds
Magic Damage: 75 / 115 / 155 / 195 / 235
(+75% of Ability Power)

WElectrical Surge 
(Passive) Every 5 attacks, Kennen will deal extra magic damage equal to a percentage of his attack damage and add a Mark of the Storm to his target.

(Active) Sends a surge of electricity through all nearby targets afflicted by Mark of the Storm, dealing magic damage. If Electric Surge is cast during Slicing Maelstrom, It will hit all enemies with in it's radius.
Cost: 40 Energy
Passive Magic Damage: (40 / 50 / 60 / 70 / 80% of Attack Damage)
Cooldown: 14 / 12 / 10 / 8 / 6 seconds
Active Magic Damage: 65 / 95 / 125 / 155 / 185
(+55% per Ability Power)

ELightning Rush 
(Active) For 3 seconds Kennen's base movement speed is increased by 230. He also gains the ability to pass through units, dealing magic damage to all enemy units in the process, and restoring 40 energy from the first enemy he hits. This ability only deals 50% damage to minions. Additionally, for 4 seconds Kennen's armor and magic resistance are increased.

While Lightning Rush is active, he can activate it again, to cancel the first part of the ability.
Cost: 100 / 95 / 90 / 85 / 80 Energy
Cooldown: 10 / 9 / 8 / 7 / 6 seconds
Magic Damage: 85 / 125 / 165 / 205 / 245
(+60% per Ability Power)
Armor and Magic Resistance Bonus: 10 / 20 / 30 / 40 / 50

RSlicing Maelstrom 
(Active) Summons a magical storm for 3 seconds that deals magic damage to all enemies near Kennen every 0.5 seconds. Each hit applies Mark of the Storm, up to a maximum of 3.

Each time an enemy is struck, further hits deal 35% less damage (minimum 50%).

Cooldown: 120 seconds
Time Between Strikes: 0.5 seconds
Magic Damage Per Bolt: 80 / 145 / 210
(+40% of Ability Power)
Number of Bolts: 6 / 10 / 15

Competitive Usage

In Premier Tournaments
Event Bans Picks Wins Losses Win % Picked/Banned in % of Games
  HOT6iX Champions Spring 2014 0 1 0 1 0 1.2
  2014 EU LCS Spring Round Robin 0 3 2 1 66.7 2.7
  2014 GPL Spring 0 2 0 2 0 2.2
  2014 LNL Spring 0 1 0 1 0 1.8
  2014 NA Challenger Series #1 0 1 1 0 100 5.6

Patch History


On a separate note, we cleaned up a few weird numbers in Kennen’s other abilities. Notably, Electrical Surge’s range was overly generous, so we’re trimming it to keep Kennen in harm’s way if he wants to jolt his enemies.


ICONS : Kennen’s icons have been updated!

  Passive - Mark of the Storm

MARK DURATION : 6.25 seconds 6 seconds
FIRST STUN DURATION : 1.25 seconds (unchanged)
REDUCED EFFECT WINDOW : 7 seconds after last stun 6 seconds after last stun
ADDITIONAL STUNS : 0.6 seconds 0.5 seconds

  Q - Thundering Shuriken

COST : 65/60/55/50/45 energy 60/55/50/45/40 energy

  W - Electrical Surge

COST : 45 energy 40 energy
RANGE : 800 750

  R - Slicing Maelstrom

LIGHTNING ROD : Slicing Maelstrom is no longer limited to striking the same target three times per cast, but only the first three strikes on a target will apply Mark of the Storm
DAMAGE : 80/145/210 (+0.4 ability power) per bolt (unchanged)
NEW DAMAGE FALLOFF : 25% per bolt (50% minimum damage)
DURATION : 3/4/5 seconds 3 seconds at all ranks
TICK RATE : 0.25 seconds 0.5 seconds
MAX DAMAGE PER TARGET : 240/435/630 (+1.2 ability power) 300/544/788 (+1.5 ability power)
EMP : Each tick now strikes every target in the area, including minions and monsters


"Simply fixing a bug that should actually impact Kennen's teamfighting a fair bit. He's historically had a lot of issues feeling unresponsive, so we're seeking to clear that up before taking a deeper look into what changes Kennen may or may not need."
  •   Passive -
    • BUGFIX : Fixed a bug in the tooltip where the stun duration was 1.25 seconds, but written as 1 second
  •   W -
    • BUGFIX : Fixed a bug where Electrical Surge sometimes wouldn't apply Mark of the Storm to enemies within Slicing Maelstrom

W now hits everyone in Slicing Maelstrom, rather than only those who'd been marked. Slicing Maelstrom also now only hits the same target every 0.5 seconds.

"For someone that runs into your entire team (talk about a big risk), it's pretty lame when the difference between a game-winning 5-man stun or an over-confident failure comes down to random chance. Slicing Maelstrom's unique feel as a multi-hit storm is cool, so we're just looking for ways to amp up that electric boogaloo. Haaayaaa! "
  •   W - Electrical Surge
    • [NEW] ELECTRIC BOOGALOO : Electrical Surge now hits all enemies caught in Slicing Maelstrom, in addition to targets afflicted by Mark of the Storm (does not double stack, that'd be crazy)
  •   R - Slicing Maelstrom
    • SLOW DOWN KENNEN : Fixed a bug where Slicing Maelstrom could hit the same target every 0.25 seconds, when it's supposed to only be once every 0.5 seconds

Mass Texture Rebalance (Part 7)

"We're continuing our comprehensive pass at the game's older character textures. As with previous installments, our goal is to improve parity with newer releases and make sure everybody looks at home on the newly-updated Rift. "
  • Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value).
    • Base, Bandito, Fiddle Me Timbers, Pumpkinhead, Spectral, Surprise Party, Union Jack
  • Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value).
    • Base, Arctic Ops, Deadly, Karate, Kennen M.D., Swamp Master
  • Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value).
    • Infernal, Lord
  • Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value).
    • Base, Baron Von Veigar, Curling, Greybeard, Leprechaun, Superb Villain, White Mage

General quality-of-life buffs for this weird lookin' Yordle.

"Like many champions before him (Veigar, Karthus, and Cho'gath come to mind) Kennen has been held back by inconsistencies in the timing of his abilities. After a much-needed round of re-coding, we've fixed an issue with Electrical Surge while also tuning Slicing Maelstrom. It's worth noting for Kennen's R that this is a slight late game nerf to his single target ult burst, but a buff to his area-effect speed."
  •   W - Electrical Surge
    • THAT RESPONSIVENESS : Electric Surge now checks for viable targets on the beginning of the cast rather than at the end (it still hits enemies after a cast time, but is generally more reliable)
  •   R - Slicing Maelstrom
    • TIME BETWEEN STRIKES : 0.5/~0.4/~0.33 seconds 0.25 seconds at all ranks
    • TIME BETWEEN STRIKES ON THE SAME PERSON : 0.5/~0.4/~0.33 seconds 0.5 seconds at all ranks
    • TOOLTIP CLARITY! : Slicing Maelstrom's tooltip now reflects the duration of the storm rather than maximum number of strikes. Its duration has always been 3/4/5 seconds.

v3.14 Electrical Surge

  • Fixed a bug where Electrical Surge would not properly hit a target if Mark of the Storm wore off or was fully consumed before the casting time of Electrical Surge completed. This fixed two scenarios:
    • Mark of the Storm will no longer wear off in the middle of Kennen casting Electrical Surge
    • If Kennen casts Electrical Surge just as Mark of the Storm is consumed by another ability, he'll still deal damage and add a stack as normal

Yordle-made shurikens seemed a little too sharp and pointy, so we've tuned down some of Kennen's early game lane harass given how much teamfight potential he has.

  • Base Attack Damage at level 1 reduced to 50.5 from 54.6
  • Mark of the Storm
    • Mark duration reduced to 6 seconds from 8


  • Electrical Surge is no longer consumed when attacking wards


  • Slicing Maelstrom
    • No longer has an energy cost


  • Basic attack has been retuned so it's more responsive


  • Base Movement Speed increased by 25.


  • Attack range reduced to 550 from 575
  • Attack animations are now more responsive


  • Thundering Shuriken cooldown increased to 8 / 7 / 6 / 5 / 4 seconds from 7 / 6 / 5 / 4 / 3


  • Thundering Shuriken ability power ratio increased to 0.75 from 0.66
  • Lightning Rush
    • Energy cost adjusted to 100 / 95 / 90 / 85 / 80 from 100 at all levels
    • Ability power ratio increased to 0.6 from 0.55


  • Added a gray version of the charging/cooldown icon for Electrical Surge


  • Mark of the Storm duration reduced to 8 seconds from 12
  • Electrical Surge range decreased to 800 from 825


  • Lightning Rush is no longer castable while disabled


  • Electrical Surge ability power ratio increased to 0.55 from 0.45
  • Lightning Rush
    • Energy cost reduced to 100 from 110
    • Now provides 10 / 20 / 30 / 40 / 50 magic resistance and armor for 4 seconds
  • Slicing Maelstrom
    • Ability power ratio increased to 0.4 form 0.33
    • Maximum number of bolts increased to 6 / 10 / 15 from 6 / 8 / 10 (this still retains the cap of 3 hits per target)
    • Removed the cap of applying only 1 Mark of the Storm per target
  • Mark of the Storm (Passive) stun duration reduced to 1 seconds from 1.25. It has a diminished stun effect if applied more than once within seven seconds

Lua error in Module:Champion_names at line 264: attempt to perform arithmetic on global 'yuumi' (a nil value). released


  • 2015

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