Kennen turns into a ball of lightning for up to 2 seconds, dealing 85/125/165/205/245 (+80% bonus Ability Power) 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 40/50/60/70/80% attack speed for 4 seconds.
Lightning Rush deals half damage to minions.
Kennen ignores unit collision while he is a ball of lightning.