(Innate): Upon dying, Anivia will revert into an egg and will get an armor and magic resistance modifier of -40 / -25 / -10 / +5 / +20. If the egg can survive for six seconds, she is reborn with the same percentage of health that her egg had left. This can only happen once every four minutes.
Rebirth is a passive ability that activates upon Anivia's death, causing her to enter her "egg form", restoring her to maximum health as well. While in this form Anivia cannot move or use any of her abilities, item active effects and summoner spells, also her armor and magic resistance are adjusted by a flat amount dependent on her champion level. If Anivia survives in egg form for 6 seconds, she will be restored to her normal state with the same percentage of health that the egg had remaining. Enemies may damage and kill the egg while Rebirth is in effect.
Rebirth is is on a 4 minute cooldown, regardless of whether Anivia survives or dies.
Anivia's normal form and egg form are considered one unit. For this reason, any projectile moving towards her in normal form will still hit her egg form, and any damage over time effect will remain active.
Due to a glitch, if Anivia is moved while in egg form, such as by the effect of Headbutt, it is possible to cast one of her non-ultimate spells during the movement.
(Active): Anivia brings her wings together and summons a single piercing shard of ice that flies on a line, chilling, slowing movement by 20% and damaging anyone in its path. When the shard explodes or is detonated by Anivia it deals magic damage in a radius, stunning anyone in the area for 1 second. The magic damage done by both the shard and the detonation is the same.
Total Magic Damage: 120 / 180 / 240 / 300 / 360 (+1.0 per ability power)
Flash Frost is a pass-through linear skillshot that releases a orb of ice, dealing magic damage and "chilling" to slow all enemy units in its path. Upon reaching its maximum range the projectile detonates, dealing magic damage, "chilling", and stunning enemy units in a radius around the explosion. While Flash Frost is mid-flight, Anivia may activate the ability again to cause the detonation at the projectile's current location.
Flash Frost will damage Black Shield and the slow will be negated but the "chilled" debuff will still apply.
Flash Frost can damage a specific target twice; once with the pass-through damage and once again from the detonation.
Flash Frost will proc Rylai's 15% slow from the moment the target receives damage until 1.5 seconds after the target receives damage for the last time (i.e from the projectile and from the detonation). During this time, both effects will stack, slowing the target by 24.2%.
Flash Frost's projectile damage will not be blocked by spell shields, but the detonation will. In the case that the detonation is blocked, the "chill" debuff will only apply if the skillshot has already traveled through the enemy.
Flash Frost's stun will interrupt channeled abilities.
Magic Damage on Chilled targets: 110 / 170 / 230 / 290 / 350 (+1.0 per ability power)
Frostbite is a targeted ability that launches an icicle at a target enemy unit, dealing magic damage on impact. If the target is affected by Anivia's "Chilled" effect at the time of impact, Frostbite will deal double its original damage.
"Chilled" enemy units leave an ice effect as they move, visible through Fog of War and stealth to both teams.
If Anivia has Rylai's on her, its full slow applied via Frostbite and the slow from Glacial Storm or Flash Frost stacks to a total 39.55% slow for 1.5s before Tenacity. Anivia's spells apply only 20% slow on their own. This practically doubled slow through Rylai's makes it a lot more difficult for the target to escape Glacial Storm on foot if E+R combo is used right.
(Toggle): Anivia summons a driving rain of ice and hail to damage her enemies, slowing their movement and attack speed by 20% for 1 second, and chilling them.
Glacial Storm is a toggled ground targeted area of effect ability. While toggled on, Anivia deals magic damage every 0.25 seconds to enemy units within the targeted area. Glacial Storm will also apply Anivia's "Chilled" debuff to slow affected enemies' attack speed and movement speed, lingering for 1 second after the last damage tick.
Glacial Storm will damage Black Shield but the "chilled" debuff will not be blocked.
Glacial Storm applies Rylai's 15% slow from the moment the target receives damage until 1.5 seconds after the target receives damage for the last time. During this time, both effects will stack, slowing the target by 24.2%.
The slows from Glacial Storm and Flash Frost do not stack.
Glacial Storm will damage and "chill" stealthed units that are in the area of effect but it will not reveal them. They will, however, leave a trail for the duration of the slow.