Abilities
Cassiopeia gains increased effectiveness from all Move Speed bonuses.
Cassiopeia poisons an area after a delay, gaining Move Speed if she hits an enemy champion.
Cassiopeia releases poison clouds that slow and ground enemies, preventing movement abilities.
Cassiopeia fires a fang that deals bonus damage and heals her if the target is poisoned, refunding mana on kill.
Cassiopeia stuns enemies facing her and slows those looking away with a cone of magical energy.
Guide
Play as a sustained damage mage, kiting with Twin Fang and using your ultimate for disengage or catching enemies in tight spaces.
Tips
Maximize your poison uptime with Twin Fang for consistent damage in ARAM's constant teamfights.
Use your ultimate, Petrifying Gaze, to catch multiple enemies off guard in narrow ARAM corridors.
Position carefully to avoid being focused; your low mobility makes you vulnerable to engage comps.
Build mana items early like Seraph's Embrace to sustain your high mana costs in extended fights.
Use Miasma to zone enemies and control key chokepoints on the Howling Abyss bridge.
Combos
Noxious Blast (Q) -> Twin Fang (E) spam for burst damage on poisoned targets.
Miasma (W) -> Petrifying Gaze (R) to slow and then stun enemies caught in the area.
Flash -> Petrifying Gaze (R) to surprise engage and stun multiple opponents.