Kennen Ability (LoL): Slicing Maelstrom

Kennen unleashes a magical storm, dealing 40 / 75 / 110 (+22.5% of ability power) magic damage to all nearby enemies every 0.6 seconds, and gaining 20 / 40 / 60 armor and magic resist for 3 seconds. Successive hits deal 10% increased damage for each hit the enemy has already suffered.