Abilities of Cassiopeia
Spell skill priority is an important winning factor for Cassiopeia. Understanding the abilities of Cassiopeia in League of Legends is another. Below you can find all the relevant information on Cassiopeia abilities. In order for item builds you should check the build for Cassiopeia.
Passive: Serpentine Grace
Cassiopeia gains Move Speed per level, but she cannot purchase Boots items.
Noxious Blast
Cassiopeia blasts an area with Poison after a brief delay, granting her increased Move Speed if she hits an enemy champion.
Cassiopeia blasts noxious gas, Poisoning enemies and dealing tooltiptotaldamage magic damage over e2 seconds. Hitting a champion grants Cassiopeia e3% Move Speed decaying over e4 seconds.
Miasma
Cassiopeia releases several clouds of poison, slowing, grounding, and lightly damaging enemies that pass through them. Grounded enemies cannot use Movement abilities.
Cassiopeia spews venom, leaving toxic clouds for e4 seconds. Enemies in the clouds take damagepersecond magic damage per second, are Poisoned, Grounded, and Slowed by e2%.
Twin Fang
Cassiopeia lets loose an attack that deals increased damage to Poisoned targets and heals her for a percentage of the damage dealt. If the target dies from this attack, Cassiopeia regains Mana.
Cassiopeia launches deadly fangs, dealing totaldamage magic damage. If the enemy is Poisoned, they take an additional bouspoisoneddamage magic damage and Cassiopeia restores healcalc Health.
If this kills the target, Cassiopeia restores cost Mana.
Petrifying Gaze
Cassiopeia releases a swirl of magical energy from her eyes, stunning any enemies in front of her that are facing her and slowing any others with their back turned.
Cassiopeia unleashes a petrifying gaze, dealing rdamage magic damage and Stunning enemies facing her for rccduration seconds. Enemies facing away are Slowed by rslowpercent% decaying over the same duration instead.
FAQ on Cassiopeia
What do you max first on Cassiopeia?
Most Cassiopeia pros max out 
Twin Fang first.