Every several seconds Lissandra's next ability costs no Mana. This cooldown is reduced whenever Lissandra impairs an enemy's movement with an ability (does not apply to movement-impairing effects from items).
Throws a spear of ice that shatters when it hits an enemy, dealing magic damage and slowing Movement Speed. Shards pass through the target, dealing the same damage to other enemies hit.
Freezes nearby enemies in ice, dealing magic damage and rooting them.
Lissandra creates an ice claw that deals magic damage. Reactivating this ability transports Lissandra to the claw's current location.
If cast on an enemy champion, the target is frozen solid, stunning it. If cast on Lissandra, she encases herself in dark ice, healing herself while becoming untargetable and invulnerable. Dark ice then emanates from the target dealing magic damage to enemies and slowing Movement Speed.