Nunu & Willump Ability (LoL): Snowball Barrage

Nunu throws three snowballs, dealing a total of 16 / 24 / 32 / 40 / 48 (+15% of ability power) magic damage per snowball and slowing enemies hit by all three by 30 / 35 / 40 / 45 / 50% for 1 second. Nunu can recast this up to twice more.

After 3 seconds, Nunu roots all nearby enemies that had been slowed by the snowballs for 0.5-1.5 seconds (depending on level) and deals an additional 20 / 30 / 40 / 50 / 60 (+80% of ability power) magic damage.