| Mark of the Storm|
Mark of the Storm
|(Innate): Kennen's abilities add Marks of the Storm to opponents which last for 8 seconds. Upon receiving 3 Marks, an opponent is stunned for 1 second and Kennen receives 25 energy. The stun has a diminished effect if applied more than once within 7 seconds.|
| Mark of the Storm is a passive ability that applies a Mark on Kennen's opponents whenever he hits them with an ability. The mark will remain on the target for 8 seconds, and this duration is refreshed with every new Mark applied. When a unit has 3 Marks of the Storm, the Marks are consumed to stun the target for 1 second and Kennen will regenerate 25 energy.
| Thundering Shuriken|
|(Active): Kennen throws a fast moving shuriken towards a location, causing damage and adding a Mark of the Storm to any opponent that it hits.
Cost: 65 / 60 / 55 / 50 / 45 energy.
Cooldown: 8 / 7 / 6 / 5 / 4 seconds.
Magic Damage: 75 / 115 / 155 / 195 / 235 (+0.75 per ability power).
| Thundering Shuriken is a collision linear skillshot that will deal magic damage to the first enemy unit it hits, applying a Mark of the Storm.
| Electrical Surge|
|(Passive): Every 5 attacks, Kennen deals magic damage equal to a percentage of his attack damage and adds a Mark of the Storm to his target.
(Active): Surges electricity through all nearby targets afflicted by Mark of the Storm, dealing magic damage and adding another mark.
Cooldown: 14 / 12 / 10 / 8 / 6 seconds.
Passive Magic Damage: 40 / 50 / 60 / 70 / 80 % of his attack damage.
Active Magic Damage: 65 / 95 / 125 / 155 / 185 (+0.55 per ability power).
| Electrical Surge passively adds bonus magic damage to every 5th autoattack and causes it to apply a Mark of the Storm. When activated, Electrical Surge is a point blank area of effect ability that targets all nearby enemy units that have a Mark of the Storm, dealing magic damage to them and applying an additional Mark.
| Lightning Rush|
|(Active): Kennen gains his base movement speed again as a flat movement speed bonus, as well as increased Armor and Magic Resistance, and the ability to pass through units. Lightning Rush deals magic damage and adds a Mark of the Storm to any hostile unit he passes through; deals half damage to minions.
Kennen is refunded 40 energy if he passes through an enemy while using this spell, but can only gain this effect once.
Cooldown: 10 / 9 / 8 / 7 / 6 seconds
Magic Damage: 85 / 125 / 165 / 205 / 245 (+0.6 per ability power).
Armor & Magic Resist: 10 / 20 / 30 / 40 / 50 .
Cost: 100 / 95 / 90 / 85 / 80 energy.
| Lightning Rush is a self-targeted ability that gives Kennen additional movement speed, armor, and magic resistance. Kennen is also able to move through units, dealing magic damage and adding a Mark of the Storm to any enemy unit he passes through.
| Slicing Maelstrom|
|(Active): Kennen summons a magical storm that deals magic damage to a random enemy champion near Kennen every 0.5/0.4/0.33 seconds. The storm hits several times, increasing with level, and cannot hit the same target more than 3 times. A Mark of the Storm is applied to enemies each time they are hit.
Cost: 50 / 45 / 40 energy.
Magic Damage: 80 / 145 / 210 (+0.4 per ability power).
Duration: 3 / 4 / 5 .
Number of Bolts: 6 / 10 / 15 .
Max Damage: 240 / 435 / 630 (+1.2 per ability power).
| Slicing Maelstrom is a point blank area of effect ability that will deal magic damage and apply a Mark of the Storm to random enemy champions in an area around Kennen. Slicing Maelstrom will strike multiple times but it cannot affect the same target more than 3 times.