Cassiopeia

The Serpent's Embrace · Battlemage

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Summoner's Rift ARAM Arena Nexus Blitz URF One for All Swiftplay Ultimate Spellbook

No Ultimate Spellbook-specific changes; plays as on Summoner's Rift.

Abilities

PassiveSerpentine Grace

All Move Speed bonuses are more effective on Cassiopeia.

QNoxious Blast3.5s50/55/60/65/70

Cassiopeia blasts an area with Poison after a brief delay, granting her increased Move Speed if she hits an enemy champion.

WMiasma24/22/20/18/16s70/75/80/85/90

Cassiopeia releases several clouds of poison, slowing, grounding, and lightly damaging enemies that pass through them. Grounded enemies cannot use Movement abilities.

ETwin Fang0.75s45

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.

RPetrifying Gaze120/100/80s100

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.

Patch history

26.18 · Sep 10, 2026

Serpentine Grace
Movement speed bonus reduced to 5% to 36% from 6% to 40%.
Noxious Blast
Base damage reduced to 65 to 205 from 75 to 215.
AP ratio increased to 75% AP from 65% AP.
Twin Fang
Initial base damage reduced to 50 to 118 from 52 to 120.
Initial AP ratio increased to 20% AP from 10% AP.
Poisoned AP ratio reduced to 45% AP from 55% AP.
Mana cost increased to 45 from 40.
Petrifying Gaze
Base damage reduced to 125 to 325 from 150 to 350.
AP ratio increased to 75% AP from 50% AP.

26.15 · Jul 29, 2026

Petrifying Gaze
Bug Fix: Fixed a bug where the VFX didn't match the ability's hitbox.

26.13 · Jun 24, 2026

Stats
Health growth reduced to 98 from 104.

26.7 · Apr 1, 2026

Stats
Base mana increased to 480 from 450.
Twin Fang
Bonus base damage increased to 20 to 120 from 20 to 112.

26.1 · Jan 8, 2026

Serpentine Grace
Bug Fix: No longer allows her to gain infinite movement speed with Nimbus Cloak, Celerity, Unleashed Teleport and Mercurial Scimitar.
Stats
Movement speed increased to 335 from 328.
Serpentine Grace
Removed: No longer gains 4 to 72 bonus movement speed, but is locked out of obtaining Boots items.
Removed: Blessing of Noxus Bonus: Serpentine Grace's bonus movement speed is increased by

35 older patches

25.23 · Nov 19, 2025

Miasma
Bug Fix: Debuff can no longer stack with itself once per cast instance of Miasma, when a target walks into a cloud from a previous cast instance of Miasma.

25.18 · Sep 10, 2025

Stats
Base mana increased to 450 from 400.
Twin Fang
Poisoned bonus damage increased to 20 to 112 from 20 to 100.

14.16

Twin Fang
Bug Fix:

Base stats

Health630 +98/lvl
Mana480 +40/lvl
Attack Damage53 +3/lvl
Attack Speed0.647 +1.5/lvl
Armor18 +4.7/lvl
Magic Resist32 +1.3/lvl
Base Health Regen5.5 +0.5/lvl
Base Mana Regen8 +0.8/lvl
Move Speed335
Range550

Ranged · Resource: Mana

1 to 18

, for a total of

5 to 90

.

New Effect: Now increases the effectiveness of all movement speed bonuses by 6% to 40%.

Heal is now properly reduced against monsters.

14.15

Stats
Base mana increased to 400 from 350.
Mana growth reduced to 40 from 60.
Noxious Blast
Mana cost reduced to 50 to 70 from 50 to 90.
AP ratio per tick reduced to 10% AP from 12.86% AP.
Total AP ratio reduced to 70% AP from 90% AP.
Miasma
Mana cost reduced to 70 to 90 from 70 to 110.
Twin Fang
Mana cost reduced to 40 at all ranks from 50 to 42.
Poison bonus AP ratio reduced to 55% AP from 60% AP.

14.10

General
Magical Footwear is now replaced by Cash Back instead of Triple Tonic.

13.22

Stats
Basic attack missile speed increased to 1500 from 1200.

12.23

General
Bug Fix: Basic attack hit VFX are now properly visible.

12.10

Stats
Base health increased to 630 from 560.
Health growth increased to 104 from 90.
Armor growth increased to 4.7 from 3.5.
Magic resistance growth increased to 1.3 from 0.5.
Twin Fang
Heal AP ratio reduced to 10 to 16% AP from 12 to 20% AP.

11.15

Twin Fang
Bonus base damage increased to 20 to 100 from 10 to 90.

11.14

Miasma
Undocumented/Bug fix: Grounded debuff can once again be cleansed by Ragnarok.

11.13

Miasma
Bug Fix: Grounded debuff is now non-dispellable.
This prevents the debuff from being briefly removed by cleanses even while the player remains in the AoE.
Bug: Because of this, Ragnarok fails to dispell and become immune to the effect for the remaining duration unless he leaves and reenters it.

11.8

Twin Fang
Mana cost reduced to 50 to 42 from 50 at all ranks.

10.23

Stats
Mana growth increased to 60 from 40.

10.13

Stats
Base magic resistance reduced to 32 from 34.

10.12

Stats
Base health reduced to 560 from 575.
Base armor reduced to 18 from 20.
Base magic resistance increased to 34 from 30.

10.11

General
Updated visual effects.
Noxious Blast
Updated the smoke particles on her base skin to more accurately stay within the actual range of the ability.
Twin Fang
Enemy champions that are Poisoned will have a fang icon over their head to indicate that they will receive bonus damage from it.
Petrifying Gaze
Updated on all skins with a decal at the edge of her hitbox, more clearly showing the area affected.

10.9

General
New voice lines from Ascension added.

10.2

Twin Fang
Bug Fix: Heals for the proper amount on large monsters.

9.14

Miasma
Cooldown increased to 24 to 16 seconds from 24 to 12.
Twin Fang
Healing reduced to 12 to 20% AP from 13 to 25% AP.
General
New Effect: Can now buffer her ability casts.
Stats
Base health increased to 575 from 537.
Health growth increased to 90 from 87.
Base mana reduced to 350 from 418.
Mana growth increased to 40 from 31.5.
Base armor reduced to 20 from 25.
Miasma
Removed: No longer has minimum cast range of 500.
Maximum cast range reduced to 700 from 800.
Cooldown changed to 24 to 12 seconds from 18 to 16.
Twin Fang
New Effect: Healing is now only 25% effective against minions and small monsters.
Healing changed to 13 to 25% AP from 5 to 22 (+ 10% AP).
Mana cost changed to 50 at all ranks from 40 to 60.

9.8

Twin Fang
Mana cost reduced to 40 to 60 from 40 to 80.

9.3

Noxious Blast
Total damage reduced to 75 to 215 from 75 to 255.
AP ratio increased to 90% AP from 80% AP.
Miasma
Mana cost increased to 70 to 110 from 70 at all ranks.
Base damage per second reduced to 20 to 40 from 20 to 60.

9.2

Miasma
Cooldown increased to 18 to 16 seconds from 18 to 14.
Base damage per second reduced to 20 to 60 from 20 to 80.

8.14

Noxious Blast
Base damage increased to 75 from 75.
AP ratio increased to 80% AP from 70% AP.

8.9

Stats
Base mana increased to 418 from 334.
Mana growth reduced to 31.5 from 63.
Base mana regeneration increased to 8 from 6.

8.7

General
Bug Fix: Now correctly plays the on-hit VFX for her basic attacks.

8.3

Stats
Base health regeneration reduced to 5.5 from 5.69.

8.2

Twin Fang
New Effect: Now draws nearby minion aggro when targeting an enemy champion.

8.1

Jade Fang Cassiopeia
Petrifying Gaze
Bug Fix: Overlay is no longer overwritten by Rylai's Crystal Scepter.

7.22

Stats
Base health increased to 537 from 525.
Health growth increased to 87 from 75.

7.18

Twin Fang
Poisoned bonus magic damage reduced to 10 from 15.
Poisoned AP ratio increased to 50% AP from 40% AP.

7.17

General
Bug Fix: Fixed a bug where, when playing with a skin, her portrait would revert to her base portrait while dead.

7.16

Stats
Base mana reduced to 334 from 375.
Mana growth increased to 63 from 60.
Twin Fang
Base damage against poisoned targets changed to 15 from 10.
AP ratio against poisoned targets increased to 40% AP from 35% AP.

7.15

General
Bug Fix: Now correctly plays her spell effort voiceover.

7.10

General
New Effect: Tail now follows her realistically as she moves and turns.

7.9

Stats
Magic resistance growth increased to 0.5 from 0.