Senna Ability (LoL): Curse of the Black Mist

Senna draws the Mist she has stored in her weapon into a storm around her, embracing darkness and becoming a wraith within for 6 / 6.5 / 7 / 7.5 / 8 seconds. Allies who enter the area are Camouflaged and also appear as wraiths as the Mist shrouds them. Wraiths gain 20% (+5% per 100 ability power) increased movement speed, are unselectable, and hide their identities as long as no enemy champions are nearby.