Senna Ability (LoL): Last Embrace

Senna sends forth the Black Mist, dealing 70 / 115 / 160 / 205 / 250 (+0.7 per bonus attack damage) physical damage to the first enemy hit. After a 1 second delay the target and other nearby enemies are rooted for 1 / 1.25 / 1.5 / 1.75 / 2 seconds.