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General Information
TitleThe Heart of the Tempest
Release DateApril 8th, 2010
Cost4800 BE 880 RP

541 (+ 84)

HP Regen
5.5 (+ 0.65)

200 (+ 0)

Energy Regen
50 (+ 0)


Attack Dmg
48 (+ 3.75)

Attack Spd
0.625 (+ 3.4%)


29 (+ 3.75)

Magic Resist
30 (+ 0.5)

Kennen is a champion in League of Legends.


  • Biography
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. Kennen 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 AkaliSquare.png Akali and ShenSquare.png Shen to enforce the balance of Valoran.

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

- KennenSquare.png Kennen


Mark of the Storm.png Mark of the Storm [Passive]

Innate: Kennen's abilities add one stack of Mark of the Storm to the target for 6 seconds. If the target reaches 3 stacks, it is stunned for 1.25 seconds and Kennen gains 25 Energy.

The stun will be a diminished duration of 0.5 seconds if it occurs again within 6 seconds.

Thundering Shuriken.png Thundering Shuriken [Q]
Cost: 60 / 55 / 50 / 45 / 40 Energy Cooldown: 8 / 7 / 6 / 5 / 4 seconds Range: 950

Active: Throws a shuriken that deals magic damage to the first enemy it hits. Magic Damage: 75 / 115 / 155 / 195 / 235 (+75%)
Electrical Surge.png Electrical Surge [W]
Cost: 40 Energy Cooldown: 14 / 12 / 10 / 8 / 6 seconds Range: 725

Passive: Every 5 attacks, Kennen deals bonus magic damage and adds a Mark of the Storm.png Mark of the Storm to his target.
Active: Sends a surge of electricity through all nearby targets afflicted by Mark of the Storm.png Mark of the Storm or Slicing Maelstrom.png Slicing Maelstrom, dealing magic damage.
Passive Magic Damage: 10 / 20 / 30 / 40 / 50 (+60 / 70 / 80 / 90 / 100% bonus) (+20% bonus)
Active Magic Damage: 60 / 85 / 110 / 135 / 160 (+80%)
Lightning Rush.png Lightning Rush [E]
Cost: 100 / 95 / 90 / 85 / 80 Energy Cooldown: 10 / 9 / 8 / 7 / 6 seconds Area of Effect: 200

Active: Kennen turns into a ball of lightning for up to 2 seconds, dealing magic damage to enemies he passes through.

While a ball of lightning, Kennen gains 100% Movement Speed. Kennen is refunded 40 energy if he damages at least one enemy in this form.

Upon returning to his normal form. Kennen gains Attack Speed for 4 seconds.

Magic Damage: 85 / 125 / 165 / 205 / 245 (+80%)
Attack Speed: 40 / 50 / 60 / 70 / 80%
Slicing Maelstrom.png Slicing Maelstrom [R]
Cost: No Cost Cooldown: 120 seconds Area of Effect: 550

Active: Summons a magical storm for 3 seconds that grants him bonus resistances and deals magic damage to all enemies near Kennen every 0.5 seconds. Each maelstrom hit applies Mark of the Storm.png Mark of the Storm, up to a maximum of 3.

Successive maelstrom hits against the same enemy deal an additional 10% damage for each hit they've already suffered from this storm.

Armor and Magic Resist Bonus: 10 / 20 / 30 / 40 / 50
Damage Per Bolt: 40 / 75 / 110 (+20%)
Number of Bolts: 6 / 10 / 15

Patch History[edit]

Patch 9.14

Attack damage and attack speed decreased; attack damage growth increased. E bonus attack speed increased.

Base Stats

ATTACK DAMAGE : [50.544] 48
ATTACK SPEED : [0.69] 0.625

Lightning Rush.png E - Lightning Rush

BONUS ATTACK SPEED : [30/40/50/60/70%]

Patch 9.9
E bonus resistances removed. Bonus resistances added to R.

Kennen's E max build, while niche, covers his vulnerabilities too well. We're moving around his resistances so that he doesn't get all that and a bag of chips in one ability.

Lightning Rush.png E - Lightning Rush

RESISTANCES No longer grants Kennen 10/20/30/40/50 bonus armor and magic resist for the duration

Slicing Maelstrom.png R - Slicing Maelstrom

RESISTANCES 20/40/60 bonus armor and magic resist for the duration

Patch 9.4

Bringing Kennen's attacks and abilities up to current League quality and readability standards.

BASIC ATTACK : Shuriken model and hit VFX updated for readability between basic attack, empowered attack, and Thundering Shuriken
MARK OF THE STORM : Proc VFX updated to better indicate source of the stun. Passive marks on minions are dimmer.
THUNDERING SHURIKEN : Shuriken model and hit VFX updated for readability between basic attack, empowered attack, and Thundering Shuriken
ELECTRICAL SURGE : Surge VFX updated. Empowered attack shuriken model and hit VFX updated for readability between basic attack, empowered attack, and Thundering Shuriken.
LIGHTNING RUSH : VFX updated to indicate area of effect and show Kennen's model during the animation
SLICING MAELSTROM : VFX updated to reduce visual noise
BLOOD MOON KENNEN : Unique VFX updated based on the same principles as the above
SUPER KENNEN : Does a superhero pose during Lightning Rush
SHURIKEN : All other skins use Kennen's base VFX aside from changing the shape of their shuriken where applicable

W 5th hit base damage and bonus attack damage ratio increased at later ranks; ability power ratio decreased. W active base damage decreased; ability power ratio increased. Kennen now loses E defenses but gains attack speed upon exiting lightning form.

Kennen is one of those champions who has seen success with both attack damage and ability power builds. At the moment, both of them are struggling. We're looking to add strength to both playstyles, and also move some of Kennen's power around to ensure that those two playstyles are somewhat different from one another.

Electrical Surge.png W - Electrical Surge

5TH ATTACK BASE DAMAGE : [15/20/25/30/35]
5TH ATTACK DAMAGE RATIO (AD) : [60%] 60/70/80/90/100% bonus attack damage
5TH ATTACK DAMAGE RATIO (AP) : [0.3] 0.2 ability power
ACTIVE BASE DAMAGE : [65/95/125/155/185]
ACTIVE DAMAGE RATIO : [0.55] 0.8 ability power

Lightning Rush.png E - Lightning Rush

STRIKE MORE THAN TWICE Kennen gains 30-70% attack speed for 4 seconds upon exiting Lightning Rush
IMPATIENT Lightning Rush's defensive bonuses are lost upon exiting Lightning Rush


BASE HEALTH : [535.72] 541
BASE ARMOR : [24.3] 29

W-empowered attack bonus is now base plus AP and bonus AD ratios. Hurricane no longer stacks W. E ratio increased.

As a basic-attack-focused mage, Kennen has access to both physical- and magic-damage focused builds. Choosing between them affects the strengths Kennen brings to the table: the physical build gives him more consistent, unrelenting damage, while the magic build makes him a burstier threat to deal with. In theory. The balance between these builds is off-kilter: AD Kennen's sustained damage is actually pretty bursty, and AP Kennen isn't bursting hard enough. We're giving AP Kennen better scaling, but our work on AD Kennen's a bit more nuanced. Primarily, we're removing Electrical Surge as a repeatable damage spike in the physical build. Surge’s AD scaling is down, and in the (usual) case where Kennen picks up Runaan's Hurricane, it no longer triples Electrical Surge's stack rate. The nuance is in the ratio switch from total AD to bonus, a change meant to mitigate the impact to bot lane Kennen, who we’d like to keep viable as a niche strategic option. Switching to bonus AD removes the innate disadvantage bot lane Kennen faces with total AD scaling (bot laners are generally lower-level than solo laners, so their base AD hasn’t scaled as much) while letting us make a smaller ratio reduction than if we had stuck with total AD.

Electrical Surge.png W - Electrical Surge

EMPOWERED ATTACK BONUS DAMAGE : [0.4/0.5/0.6/0.7/0.8 total attack damage] 15/20/25/30/35 (+0.6 bonus attack damage) (+0.3 ability power)
SHURRICANE Electrical Surge now stacks when Kennen fires a basic attack, instead of on-hit. (Runaan’s Hurricane no longer grants extra stacks.)

Lightning Rush.png E - Lightning Rush

RATIO : [0.6 ability power] 0.8 ability power

Kennen's ultimate damage now weighted towards the end, not the beginning.

Kennen excels at destroying a whole team with area of effect damage when they have no way to escape, and that’s a cool niche for him to fill. Right now, he’s pumping out most of his damage before anybody has even had time to run the other way. We’re weighting his ultimate damage toward its later ticks so that Kennen shines when he Manages to keep opponents in the storm even after the stun wears off.

Slicing Maelstrom.png R - Slicing Maelstrom

DAMAGE PER BOLT : [80/145/210 (+0.4 ability power)] 40/75/110 (+0.2 ability power)
SUCCESSIVE STRIKE MODIFIER : [100/75/50/50/50/50% damage on strikes 1-6 (per target)] 100/110/120/130/140/150% damage on strikes 1-6 (per target)
TOTAL DAMAGE : [300/543.75/787.5 (+1.5 ability power)] 300/562.5/825 (+1.5 ability power)

Smoother Kennen basic attacks.

Kennen’s Electrical Surge empowered basic attacks travel at a different speed than his normal basic attacks. We’re bringing the two in line with each other to create a more consistent experience around last-hitting and harassing in lane.


ANIMATION FIX : Kennen’s basic attack animation has been updated to better match when the shuriken leaves his hand

Electrical Surge.png W - Electrical Surge



Kennen's niche of "dive the enemy team and stun kids" is well-defined, but the randomness of who his ult zaps means his teamfighting impact is often left up to chance. Sometimes Slicing Maelstrom focus-fires a priority target on the far edge of its range, other times it ignores the squishy that Kennen’s right beside as they saunter off to safety. This can be just as frustrating for Kennen’s opponents; it all depends on who draws the short straw. We’re removing Slicing Maelstrom’s randomness to make it more consistent for both sides: Kennen will always stun enemies he’s allowed to stay close to, so it’s nevewaste of resources to peel him off your backline. 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!

Mark of the Storm.png 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

Thundering Shuriken.png Q - Thundering Shuriken

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

Electrical Surge.png W - Electrical Surge

COST : [45 energy] 40 energy
RANGE : [800] 750

Slicing Maelstrom.png 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)
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."
  • Mark of the Storm.png Passive -
    • BUGFIX : Fixed a bug in the tooltip where the stun duration was 1.25 seconds, but written as 1 second
  • Electrical Surge.png 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! "
  • Electrical Surge.png 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)
  • Slicing Maelstrom.png 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. "
  • FiddlesticksSquare.png Fiddlesticks
    • Base, Bandito, Fiddle Me Timbers, Pumpkinhead, Spectral, Surprise Party, Union Jack
  • KennenSquare.png Kennen
    • Base, Arctic Ops, Deadly, Karate, Kennen M.D., Swamp Master
  • MordekaiserSquare.png Mordekaiser
    • Infernal, Lord
  • VeigarSquare.png Veigar
    • 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."
  • Electrical Surge.png 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)
  • Slicing Maelstrom.png 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

KennenSquare.png Kennen released


  • 2015

Additional Content[edit]

Champion Information[edit]

Related Lore[edit]

Journal of Justice


Champion Spotlight


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