Sona Ability (LoL): Song of Celerity

Active: Sona gains 20% (+2% per 100 ability power) movement speed for 3 seconds. The buff lasts for an additional 4 seconds while Sona is out of combat.

Aura: Allied champions tagged with Song of Celerity's aura gain 10 / 11 / 12 / 13 / 14% (+2% per 100 ability power) movement speed for 3 seconds. Sona gains 30 mana the first time she tags an ally with her aura.

Power Chord - Tempo: If this spell was last cast when Power Chord is ready, Power Chord will also slow the target by 40% (+4% per 100 ability power) for 2 seconds.