Kennen

The Heart of the Tempest · Specialist

View builds

Summoner's Rift ARAM Arena Nexus Blitz URF One for All Swiftplay Ultimate Spellbook

Changes in One for All

-2% damage dealt · +2% damage taken

Abilities

PassiveMark of the Storm

Kennen stuns enemies he hits 3 times with his abilities.

QThundering Shuriken7/6.25/5.5/4.75/4s60/55/50/45/40

Kennen throws a fast moving shuriken towards a location, causing damage and adding a Mark of the Storm to any opponent that it hits.

WElectrical Surge13/11.25/9.5/7.75/6s40

Kennen passively deals extra damage and adds a Mark of the Storm to his target every few attacks, and he can activate this ability to damage and add another Mark of the Storm to targets who are already marked.

ELightning Rush10/9/8/7/6s

80

Kennen morphs into a lightning form, enabling him to pass through units and apply a Mark of the Storm. Kennen gains Move Speed when entering this form, and attack speed when leaving it.

RSlicing Maelstrom120s

Kennen summons a storm that strikes at nearby enemy champions for magical damage.

Patch history

26.16 · Aug 12, 2026

Slicing Maelstrom
Bonus resistance increased to 25 to 75 from 20 to 60.
Base damage per bolt increased to 40 to 120 from 40 to 110.
AP ratio per bolt increased to 25% AP from 22.5% AP.

26.9 · Apr 29, 2026

Electrical Surge
New Effect: Empowered attack can now critically strike for 140% (+ 40% bonus critical strike damage) damage.
Stacks are now consumed on-attack, instead of when the empowered attack hits.
New Effect: The ability's effects can now apply for every basic attack on-hit that is part of the empowered attack's cast instance (i.e like the attacks from Runaan's Hurricane Wind's Fury). [https://www.youtube.com/watch?v=_VnBwaIRfs4]
Lightning Rush
New Effect: Critical strikes now extend the bonus attack speed's duration by 1 second, up to the original duration.

26.4 · Feb 19, 2026

Slicing Maelstrom
Cooldown increased to 120 seconds at all ranks from 120 to 80.

25.14 · Jul 16, 2025

Electrical Surge
Bug Fix: Attack is no longer consumed on traps.

14.17

Thundering Shuriken
AP ratio reduced to 75% AP from 85% AP.

35 older patches

14.13

Stats
Base health reduced to 580 from 611.

14.9

Lightning Rush
Indicator now includes a decal for the ability's collision radius.
Slicing Maelstrom
Updated cast animation.
New Effect: Caster can now move during the cast time.

14.2

Electrical Surge
New Effect: Now grants maximum passive stacks on respawn.

13.18

Base stats

Health580 +98/lvl
Mana200
Attack Damage48 +3.75/lvl
Attack Speed0.625 +3.4/lvl
Armor29 +4.95/lvl
Magic Resist30 +1.3/lvl
Base Health Regen5.5 +0.65/lvl
Base Mana Regen50
Move Speed335
Range550

Ranged · Resource: Energy

Lightning Rush

Energy cost reduced to 80 at all ranks from 100 to 80.

Slicing Maelstrom

Cooldown reduced to 120 to 80 seconds from 120 at all ranks.

13.16

Infernal Kennen
Bug Fix: VFX no longer conflicts with his character model to the extent that he becomes indistinguishable.

13.6

Lightning Rush
Bug Fix: Now properly deals 65% damage to jungle monsters.

13.5

Thundering Shuriken
Base damage increased to 75 to 275 from 75 to 255.
AP ratio increased to 85% AP from 75% AP.
Cooldown reduced to 7 to 4 seconds from 8 to 4.
Electrical Surge
New Effect: When an enemy champion becomes marked, now shows a range indicator to Kennen.
Lightning Rush
Damage against non-champions increased to 65% from 50%.
Non-champion base damage increased to 52 to 156 from 40 to 120.
Non-champion AP ratio increased to 52% AP from 40% AP.

12.19

Lightning Rush
Undocumented: Attack speed cap can now be exceeded during the attack speed buff.
This change is documented on V12.20.

12.18

Lightning Rush
Bug Fix: VFX on the character model no longer overrides the VFX for Exhaust.

12.15

Electrical Surge
Active base damage increased to 70 to 170 from 60 to 160.
Cooldown reduced to 13 to 6 seconds from 14 to 6.
Slicing Maelstrom
AP ratio per tick increased to 22.5% AP from 20% AP.

12.10

Stats
Base health increased to 611 from 541.
Health growth increased to 98 from 84.
Armor growth increased to 4.95 from 3.75.
Magic resistance growth increased to 1.3 from 0.5.
Electrical Surge
Undocumented: Effect radius reduced to 775 units from 1600.

12.6

Electrical Surge
Undocumented / Bug: Effect radius increased to 1600 units.

12.5

Electrical Surge
On-hit base damage increased to 35 to 75 from 20 to 60.
On-hit AP ratio increased to 35% AP from 25% AP.
On-hit bonus AD ratio increased to 80 to 120% bonus AD from 60 to 100%.

11.19

Thundering Shuriken
Base damage reduced to 75 to 255 from 85 to 265
AP ratio reduced 75% AP from 80% AP.

11.15

Thundering Shuriken
Base damage increased to 85 to 265 from 75 to 235.
AP ratio increased to 80% AP from 75% AP.

11.10

Electrical Surge
On-hit base damage increased to 20 to 60 from 10 to 50.
On-hit AP ratio increased to 25% AP from 20% AP.

11.8

Electrical Surge
Bug Fix: Fixed a bug where the SFX would continue to play after cast until his death.

10.16

Lightning Rush
Bug Fix: Killing the clone from Hallucinate and dying to the detonation no longer causes the ability to be permanently swapped to the recast.

10.13

Kennen M.D. Kennen
Updated visual effects.

9.14

Stats
Base attack damage reduced to 48 from 50.544.
Attack damage growth increased to 3.75 from 3.3.
Attack speed at level 1 reduced to 0.625 from 0.69.
Lightning Rush
Bonus attack speed increased to 40 to 80% from 30 to 70%.

9.13

Lightning Rush
Bug Fix: Now has the proper range.
Lightning Rush
Now more quickly and reliably applies its effects to enemies they hit.

9.9

Lightning Rush
Removed: No longer grants 10 to 50 bonus armor and magic resistance while active.
Slicing Maelstrom
new Effect: Now grants 20 to 60 bonus armor and magic resistance for the duration.

9.6

Slicing Maelstrom
New Effect: Now triggers effects that are triggered by DoT AoE abilities.

9.4

General
Updated visual effects.
Basic attack shuriken model and hit VFX updated for readability between basic attack, empowered attack, and Thundering Shuriken.
All skins aside from Blood Moon Kennen and Super Kennen use the base VFX aside from changing the shape of their shuriken where applicable.
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 his 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.

8.22

Electrical Surge
Bug Fix: No longer stops moving after casting it.

8.14

General
New SFX on entire kit.

8.10

Electrical Surge
Bug Fix: Passive damage now correctly appears on Death Recap.

8.9

Electrical Surge
Passive base damage changed to 10 from 15.
Passive bonus AD ratio increased to 60% bonus AD from 60% at all ranks.
Passive AP ratio reduced to 20% AP from 30% AP.
Active base damage reduced to 60 from 65.
Active AP ratio increased to 80% AP from 55% AP.
Lightning Rush
New Effect: If Lightning Rush damages an enemy champion, he gains 30% bonus attack speed for 4 seconds upon exiting Lightning Rush.
Bonus resistances now only persists while in lightning form, from a static 4 seconds.

8.3

Stats
Base health regeneration reduced to 5.5 from 5.592.

7.22

Stats
Base armor increased to 29 from 24.3.
Base health increased to 541 from 535.72.
Health growth increased to 84 from 79.
Lightning Rush
Active base damage reduced to 80 to 240 from 85 to 245.

7.13

Electrical Surge
New Effect: Passive now deals 15 base damage.
New Effect: Passive now scales with 30% AP.
Passive AD ratio changed to 60% bonus AD at all ranks from 40% AD.
New Effect: Passive counter increments upon launching an attack, previously was upon landing a hit.
Runaan's Hurricane no longer grants extra stacks on secondary targets.
Lightning Rush
AP ratio increased to 80% AP from 60% AP.

7.9

Stats
Magic resistance growth increased to 0.5 from 0.

7.7

Kennen M.D.
Bug Fix: Fixed some dark textures appearing on the scalpel in his basic attack.
Blood Moon Kennen
Lightning Rush
Bug Fix: Fixed a bug where a random particle would appear when using it.

7.4

General
Adjusted splash artwork for Deadly Kennen, Swamp Master Kennen, Kennen M.D. and Arctic Ops Kennen.

7.3

General
Bug Fix: Fixed a bug on most of Kennen's skins where the on-hit particles for his basic attack were not properly appearing.