Yuumi fires a missile that deals 40 / 70 / 100 / 130 / 160 / 190 (+30% of ability power) (+2%-8% of the target's current health) in magic damage to the first enemy hit. If the missile is in flight for 1 second, it instead deals 45 / 85 / 125 / 165 / 205 / 245 (+40% of ability power) magic damage and applies a 20% slow to enemies for 1 second.

If Yuumi is Attached, she fires the missile from her ally's position and can direct the flight of the missile for up to 2 seconds.