Janna Ability (LoL): Howling Gale

Janna summons a mighty whirlwind, which she can release to deal 60 / 85 / 110 / 135 / 160 (+35% of ability power) + 15 / 20 / 25 / 30 / 35 (+10% of ability power for each second it charges) magic damage to all targets in its path, knocking them into the air for 0.5 seconds and an extra 0.25 seconds for each second charged. The distance traveled by the whirlwind also increases for each second it channels to a maximum of 1750 units at 3 seconds.