Kennen Ability (LoL): Lightning Rush

Kennen turns into a ball of lightning, gaining 100% movement speed, dealing 80 / 120 / 160 / 200 / 240 (+80% of ability power) magic damage to enemies he passes through, and becoming ghosted for 2 seconds. If Kennen damages at least one enemy, he gains 40 Energy.

After this ability ends, Kennen gains 40 / 50 / 60 / 70 / 80% attack speed for 4 seconds. Critical strikes extend this duration by 1 second, up to the original duration. Kennen can recast to end this ability early.