Anivia Ability (LoL): Glacial Storm

Toggle: Anivia calls forth a driving rain of ice and hail, dealing 40 / 60 / 80 (+12.5% of ability power) magic damage per second to all enemies within while slowing their movement speed by 20 / 30 / 40% for 1 second and chilling them. The size of the area increases over 1.5 seconds. At maximum size, the storm deals 300% damage and slows enemies by an additional 50%.

Costs 40 / 50 / 60 mana per second while the storm is active.