Abilities
Senna's attacks are slower but deal bonus damage and steal Move Speed; collecting souls from dead enemies increases her AD, range, and crit chance.
Senna fires a beam that heals allies and damages enemies in a line.
Senna fires a wave that roots the first enemy hit and nearby foes after a short delay.
Senna becomes a wraith, granting herself and nearby allies camouflage, bonus move speed, and unselectability.
Senna fires a global beam that shields allies and damages enemies in its center.
Guide
Play as a scaling marksman support, focusing on stacking Mist from souls to increase range and damage, while using your utility to peel and heal allies in ARAM's constant teamfights.
Tips
Stack Mist quickly by auto-attacking enemy champions and collecting souls from minions and champions.
Use your ultimate to snipe low-health enemies across the map or to shield allies in teamfights.
Position safely behind your frontline to maximize your range and avoid getting caught.
Build attack damage and critical strike items to scale your damage with souls.
Use your Q to heal allies and damage enemies through minions or champions.
Combos
Q through a minion or champion to hit an enemy and heal an ally simultaneously.
W (Root) into R (Ultimate) for a long-range pick or to set up a teamfight.
Auto-attack to stack Mist, then Q to reset your auto and burst damage.