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The Serpent's Embrace
Release Date: December 14th, 2010
Cost: 4800 BE 880 RP
Attribute: Mage
Resource: Mana
Real Name: Cassiopeia du Couteau
Health Mini Icon.png Health: 537 (+ 87)
HealthRegen Mini Icon.png Health Regen: 5.5 (+ 0.5)
Mana Mini Icon.png Mana: 418 (+ 31.5)
ManaRegen Mini Icon.png Mana Regen: 8 (+ 0.8)
MovementSpeed Mini Icon.png Movespeed: 328
AttackDamage Mini Icon.png Attack Damage: 53 (+ 3)
AttackSpeed Mini Icon.png Attack Speed: 0.647 (+ 1.5%)
Range Mini Icon.png Range: 550
Armor Mini Icon.png Armor: 25 (+ 3.5)
MagicResist Mini Icon.png Magic Resist: 30 (+ 0.5)
Base Skin Chroma
Curse Chroma Pack  (585 RP)
Release Date: 2015-08-13
290 RP
290 RP
290 RP
Chroma Icon.png
Desperada Cassiopeia Released: 2010-12-14 / 520 RP
Siren Cassiopeia Released: 2010-12-14 / 520 RP
Mythic Cassiopeia Released: 2012-07-19 / 975 RP
Jade Fang Cassiopeia Released: 2013-02-08 / 975 RP
Eternum Cassiopeia Released: 2017-09-21 / 1350 RP


  • Biography
  • Story
  • Previous Bio
  • League Judgement
Cassiopeia is a terrifying creature - half woman, half snake - whose slightest glance brings death. The youngest daughter of one of Noxus's most influential families, she was once a beautiful and cunning temptress capable of manipulating the hardest heart. Transformed by the venom of an ancient Shuriman tomb guardian, she continues to serve Noxian interests as she always has, just in a more... visceral way.
"There is no antidote for me."

- CassiopeiaSquare.png Cassiopeia


Cassiopeia reclined against a crenulated rooftop and gazed over the winding alleys and crowded streets of Noxus. Untroubled by the cool night air, she wore a shift of translucent silk, which revealed the transition at her hips where soft skin merged into overlapping scales of sinuous snakeskin.

The scent of roasted meat wafted up to Cassiopeia’s hidden aerie, but it could not mask the vile stench of thousands of people living on top of each other. Her mouth burned as noxious venom mingled with her saliva. She flexed her muscular tail, cracking the stonework and sending crumbled fragments to the streets below.

Rats scattered from the falling stone. Filthy street urchins dashed around street corners as hooded figures whispered in the shadows and burly soldiers staggered in and out of taverns. All were oblivious to the predator lurking in the darkness above.

Cassiopeia brushed a taloned hand against her scaly side, her serpentine figure concealed by the shadows. These days, she emerged only under cover of night. Once, she had been a powerful figure in Noxus: assassins killed at her slightest whim, soldiers spilled their darkest secrets, and generals willingly followed her counsel in the hopes of patronage. Cassiopeia sighed. No longer was she an influential voice in Noxian society, not since she had been reduced to this grotesque abomination in hiding.

Upon her return from Shurima, Cassiopeia had hidden in her family’s crypt, fearful of her transformation. She remained alone in the cold, dank vault for weeks, filled with disgust for her serpentine body and mourning the loss of her aristocratic life. Eventually, a growing desire to hunt overwhelmed her, and she ventured out to roam the city by night as her family slumbered.

Cassiopeia put aside her reverie as a broad shouldered soldier in a leather breastplate stumbled from a tavern, drink in hand. Finally; this was the man she’d been waiting for. She trailed his movements from above, following him silently over fortress walls and archways, until he entered an empty courtyard. Perfect. Cassiopeia slithered onto an adjacent roof, eyes glinting with predatory thrill.

Her figure cast a shadow across the soldier. He turned, drunkenly defiant.

“I know you’re there! Show yourself!” he said.

Cassiopeia’s tail twitched in anticipation. Her forked tongue extended, tasting the air. She drew the sweet scent of his blood into her lungs, then exhaled with great satisfaction.

“Fight me face to face!” he shouted. “I ain't gonna be stalked like some animal.”

Cassiopeia let out an angry hiss. By the time the soldier looked up, she’d slid to the opposite side of the courtyard and perched directly above him, remaining out of sight in the shadows.

“You consider yourself better than an animal, do you?” she said.

The man’s head turned abruptly, trying to pinpoint the sound of her voice.

“How’d you get across so fast?” he said, his wavering tone betraying false bravado.

“Even beasts are nothing to your savagery” said Cassiopeia.

Breathless, he edged away, looking for an escape. He hammered his fists against every door, but each was bolted shut. Cassiopeia imagined his mind racing to solve the riddle of who was hunting him and why.

He unsheathed his sword, turning on the spot, unsure where to direct his threat. “You don’t want to cross me. I’ve gutted worse enemies than you.”

“Not just enemies” Cassiopeia replied. “I’ve seen your handiwork. You’re not the only one who creeps about in the dark.”

She spat a bilious wad of venom as he turned toward the sound of her voice. The man howled in pain, coin-sized holes burning through his armor and into his skin. She inhaled the satisfying sear of burning leather and flesh.

The man brandished his sword. “Who are you? Why’re you doing this?”

“I’ve been watching you” replied Cassiopeia. “I know what you are, what you do…”

“What I do is no business of yours.”

“I know you’re murdering children for drake meat. I hear it’s quite lucrative.”

The man tried to pry open the shutters of a nearby window with the flat of his sword, but they too were bolted shut.

“Then there’s the three tavern wenches” said Cassiopeia. “Sarmela, Elmin, and Lyx. They were found in the river yesterday. Their faces were hardly recognizable once you’d finished with them.”

She relished the thought of sinking her talons into his flesh.

The man readied his stance. “You can’t fight me from the shadows. Show yourself!”

“Very well” Cassiopeia said.

She slithered down to the courtyard and rose to her full height. The man’s eyes widened in horror, his hands trembling. Cassiopeia stood head and shoulders over the man, glaring down with narrowing eyes.

“Monster!” he cried.

“Monster” murmured Cassiopea. “Not the worst I’ve been called.”

She slid left and whipped her tail across his legs, effortlessly knocking him to the ground.

Curling her tail around his chest, she squeezed his ribcage tighter and tighter, sensing his pounding heart straining beneath her grasp. She heard bones crack. She resisted the urge to break him completely, and released her grip. He crawled to his sword, grasping it in desperation. She so enjoyed watching him tremble.

She circled him slowly. He met her gaze and stared in slow recognition.

“I know your face. The Lady Cassiopeia!” he said. “Look at you!”

Point to the ground, he pushed himself onto his feet with his sword.

“You chase drunkards like me through the filthy gutters of this city now, is that it?” The man spat a wad of blood. “From such great heights we fall, eh?”

She hissed, exposing dripping yellow fangs.

Cassiopeia’s gaze bored into the man’s eyes, locking them in a cold-hearted bond. She screamed, pouring all her rage into the cry; fury at the unfairness of her current state, anger at the loss of her privileged life, resentment for her failed ambitions. She channeled it all into the screeching, mind-shredding wail.

As she screamed, her fury was replaced with joy. It felt like she was floating, her potential for greatness infinite. Every fiber of her being sang with ancient power.

Searing emerald light blazed from Cassiopeia’s eyes. The man’s final panic was outlined in silhouette as he petrified from the inside out. His stare hardened, greyed, and stiffened, his last cry of terror stifled as her curse transformed his flesh to stone.

Cassiopeia slithered up to the statue and softly caressed its hard cheek. What was once skin fractured into a grisly pattern resembling a dried riverbed.

“Once, I had to manipulate, bribe, or otherwise... persuade people to orchestrate my schemes” she said. “But now... now I simply take what I want.”

She whipped her tail forward, smashing the statue to the ground. She smiled, eyes glinting, as it shattered into a thousand pieces of dust and rubble.

Cassiopeia flushed with pride as she considered her handiwork. Her life as a noble was over, yes, but never had she felt such boundless power coursing through her veins. She slithered back onto the rooftops, her mind awhirl with ideas.

Her next victim would offer her a far greater challenge.

While her sister KatarinaSquare.png Katarina has always been the most celebrated member of the household, the Du Couteau family has a long history of service to Noxus. It has often been said that no soldier has ever been as fortunate as General Du Couteau to have been graced with daughters. His youngest, Cassiopeia - despite lacking her sister's killer instincts - was equally renowned in at court for her stately character and elegance. Cunning as she was beautiful, the temptress could never be found far from the arm of any foreign dignitary, her wiles prying secrets from the lips of even the most wary attaché. With the Noxian barbarian pacification campaign having ground to a standstill, Cassiopeia had set her sights on a diplomat from a tribe of theFreljord region. Thinking him an easy mark, the scheming seductress set about beguiling him. He refused to confide in her, however, until she swore an oath of secrecy upon his sword - a strange weapon with a serpentine curve to the blade.

Once her tryst was over, Cassiopeia provisioned her father with information regarding the barbarian resistance. As she divulged this intelligence, a wave of revulsion washed over her. She screamed in agony as her silky skin hardened to scales, her lustrous hair thickened to leather, and her manicured fingernails sharpened to claws. Dazed, she fell upon a group of horrified servants, rending them limb from limb in a heartbeat. When it was over the blood soaked figure was no longer the ravishing jewel of the Noxian court, but a horror trapped somewhere between woman and serpent. Unable to serve in her traditional capacity, Cassiopeia departed for the League, continuing her service to Noxus on the Field of Justice.

"Though she may have appeared the innocent flower, she was the serpent under it."

- KatarinaSquare.png Katarina, the Sinister Blade

Candidate: Cassiopeia

Date: 10 December, 20 CLE


Cassiopeia glides along the marvelous hallway with unnerving grace, the scrape of scale on marble announcing her passing to the empty corridor. Her elegant curves and stately posture combine to form an appalling juxtaposition to her serpentine body. The exquisite features of her face, wreathed in a cobra's hood, bears a look of chilling determination, while a serpent's tail conveys her expediently onward towards her destination.

She pauses for a moment before a pair of grand double doors, the relief of a panther marking each one. Above the doors, carved on the stone archway, is an inscription: "The truest opponent lies within." Her eyes narrow as she reads the engraving.

Cassiopeia stretches a taloned finger towards the door. It parts effortlessly at her touch, swinging open into blackness. She peers hesitantly into the black for a moment before composing herself and gliding inside.


She found herself in her chambers in the Noxian estate she called home. An elegant curtain ran across the center of the room; a shroud against prying eyes. There, through the lace, stood the unmistakable figure of her father, General Marcus Du Couteau. She stared at him longingly, admiring everything about him, from his stately military garb to his perfect soldier's posture.

He stepped forward, extending a hand towards the partition. There was moment of panic. No matter how many times she allowed her closest family to see her, she was always overwhelmed with anxiety and revulsion.

"Don't look at me!" Cassiopeia lamented.

The General froze for a moment. Then his voice took on a sterner character. "You are my daughter, Cassiopeia. And you are beautiful."

"Liar!" she hissed, turning away. She could hear the rustling of curtains as he approached.

"Daughter, look at me", he implored. Reluctantly, she complied, wiping away her tears with a viciously clawed hand. She did not speak.

"Cassiopeia", he went on, taking a step forward, "I have been summoned. It is a grave matter, but one that I cannot refuse."

"Take sister with you. She can keep you safe", she sobbed.

Marcus shook his head, "Katarina cannot return. The matter with Ionia has not yet been settled, and her duty to the League compels her to stay."

"Father, if you do not return, I will be alone", she stated.

The General reached out to touch his daughter's face and she recoiled, turning her back again. His voice turned colder than iron. "You are a Du Couteau, Cassiopeia. You have served Noxus, and she cares for her children. You will never be alone." He paused. "One day, you will remember your duty."

General Du Couteau took her hand and pressed a sealed letter into her palm, crumpling it slightly. "Should I not return, Cassiopeia, this will guide you and Katarina."

Hearing her father turn to leave, Cassiopeia panicked. She spun about, but found herself alone. She examined the letter in her hand. It was marked in a wax signet that she did not recognize, but the seal was already broken. She unfolded the page.

In blood red ink, someone had penned: "Transcendence Way, the Ivory Ward, 5:00 PM." Below it was a stamped image of a black rose.

The peals of a clock tower caught her attention, followed by the sounds of bedlam. All around her the household abruptly became chaos. Each passing footfall and gossiping whisper filled her with ire. There came a hesitant knock at the door. She already knew who to expect.

"Enter!" she commanded, her rage overcoming her revulsion at the thought of being seen. The door swung open, revealing one of her father's bodyguards. He entered slowly, staring intently at her silhouette on the other side of the curtains, his face a mixture of fear and shame.

"Mistress Cassiopeia," he began, "Your father has..."

She cut him off, "Spare me your excuses, fool! How did it happen!"

"We were in the market," he stammered, "Your father slipped away."

"And I ordered you to shadow him, did I not?" sneered Cassiopeia. She drew closer to the partition. The soldier looked away in shame. He did not answer. Cassiopeia sunk her talons into the hanging fabric, ripping it from its moorings in one swift motion and laying bare her monstrous body. "Speak, coward!" she commanded.

The bodyguard backed away in horror, blanching white in shock.

"What's wrong?" Cassiopeia teased, drawing one of her wicked hands to her face in feigned surprise. "Don’t you find me beautiful?"

She advanced, fastening her claws securely around his neck. She lifted his worthless body and suddenly, a shattered pocket watch fell out of his pocket. The watch's hands stopped dead at a quarter past five. "This was all we found," he croaked.

She caught her quarry's gaze in hers, his body shaking as she choked the life from him. His face was white as snow, but for some reason there was no fear in his eyes. Realization washed down the length of her serpentine body. Cassiopeia sneered. "Charlatan," she muttered, venom dripping from the words. "You force me to relive the moment I lost my father for your own sick pleasure?"

The bodyguard's face turned as implacable as his eyes. "Why do you want to join the League, Cassiopeia?" he inquired.

"My father is dead," she spat, "One of you knows something. And I will have justice."

The soldier nodded. "How does it feel, exposing your mind?"

Cassiopeia's looked him dead in the eye. "Curse you," she muttered emotionlessly. The figure dissolved in her grip, leaving only the darkness. The doors to the League swung open.


Serpentine Grace.png Serpentine Grace [Passive]

Innate: Cassiopeia gains Movement Speed per level. Cassiopeia cannot purchase Boots items.
Movement Speed: 4 x level
Noxious Blast.png Noxious Blast [Q]
Cost: 50 / 55 / 60 / 65 / 70 Mana Cooldown: 3.5 seconds Range: 850 Area of Effect: 75

Active: Blasts enemies in an area with Noxious Poison. If a champion is hit, Cassiopeia gains Movement Speed decaying over 3 seconds.

Noxious Poison deals magic damage over 3 seconds.

Movement Speed: 30 / 35 / 40 / 45 / 50%
Magic Damage: 75 / 125 / 175 / 225 / 275 (+80%)
Miasma.png Miasma [W]
Cost: 70 Mana Cooldown: 18 / 17 / 16 / 15 /14 seconds Range: 800 Area of Effect: 160

Active: Cassiopeia spews venom in an arc, leaving toxic clouds for 5 seconds.

Enemies in the clouds are continually afflicted with Debilitating Poison, inflicting a decaying slow and grounding them, prohibiting the use of Movement abilities. They also take magic damage per second.

Miasma has a minimum cast range and stops on the first terrain hit.

Magic Damage: 20 / 35 / 50 / 65 / 80 (+15%)
Slow: 40 / 50 / 60 / 70 / 80%
Twin Fang.png Twin Fang [E]
Cost: 40 / 50 / 60 / 70 / 80 Mana Cooldown: 0.75 seconds Range: 700

Active: Deal magic damage to a target. If the target is killed by Twin Fang, or is killed during its flight, Cassiopeia gains Mana.

If the victim is Poisoned when Twin Fang hits, it takes additional magic damage and heals Cassiopeia.

Magic Damage: 52 - 120 (+10%)
Poisoned Bonus Damage: 10 / 30 / 50 / 70 / 90 (+60%)
Heal: 4 + (1 x level) (+10%)
Petrifying Gaze.png Petrifying Gaze [R]
Cost: 100 Mana Cooldown: 120 / 100 / 80 seconds Area of Effect: 850

Active: Cassiopeia deals magic damage to all enemies in a cone in front of her. Enemies facing her when damaged are stunned for 2 seconds, while enemies facing away are slowed by 40%. Magic Damage: 150 / 250 / 350 (+50%)

Patch History


Q base damage increased late. Q damage ratio increased.

Noxious Blast.png Q - Noxious Blast

BASE DAMAGE : [75/120/165/210/255]
DAMAGE RATIO : [0.7] 0.8 ability power


25 mages have more mana regen and base mana, but less mana growth. 5 other mages have more mana regen.

We’re increasing mana regen on the champions most affected by the changes to Doran's Ring and Last Chapter. Mages are also getting some changes to their mana pools and their mana growth. Overall, they’ll be up a bit of starting mana and mana regen, but be substantially down on mana per level.


Noxious Blast.png Q - Noxious Blast

COST : [60/65/70/75/80]
50/55/60/65/70 mana

Twin Fang.png E - Twin Fang

BONUS DAMAGE VS POISONED TARGETS : 10/30/50/70/90 [(+0.5 AP)]
(+0.6 AP)  


BASE HEALTH : [525] 537

E bonus against poisoned targets shifted from base damage into ratio.

Twin Fang’s high base damage is allowing Cassiopeia to dip into defensive itemization while still pumping out glass-cannon-level damage in the early-to-mid game. If Cass wants to melt face, she should have to (literally) pay for it.

Twin Fang.png E - Twin Fang

BONUS RATIO VS POISONED TARGETS : [0.4] 0.5 ability power

Mana per level increased. E base damage down, AP ratio increased.

Cassiopeia is known and picked for her ability to control her lane very well during early levels. We’re okay with her having some early kill pressure, but opting into the level 1 non-empowered “E-spam” strategy shouldn’t automatically win the lane.

Base stats

BASE MANA : [375] 334

Twin Fang.png E - Twin Fang

DAMAGE VS POISONED TARGETS : [10/40/70/100/130 (+0.35 AP)]
15/40/65/90/115 (+0.4 AP)


For real thissssssssss time.


NO HOVER SNAKES : Cassiopeia’s tail now follows her realistically as she moves and turns


With Aegis of the Legion's old aura out of the game, squishy champions who were relying on it to give them enough magic resist find themselves a bit on the burstable side.

HOORAY : Champions who previously gained no magic resist per level now gain 0.5 per level

Cassiopeia is now slick. Fixed a Flash + Ult bug.


NO HOVER SNAKES : Cassiopeia’s tail now follows her realistically as she moves and turns


DIZZY SNAKE : Flashing during R - Petrifying Gaze’s cast time no longer resets the direction the cone fires in. It now consistently fires in the direction Cassiopeia faced before Flashing. This addresses a bug that sometimes caused Petrifying Gaze’s visuals to not line up with the actual effect.

W cast range reduced. E healing down.

We’ve had this conversation a few times since mid-season, but to restate one of our beliefs: late-game characters like Cassiopeia need to have windows of interaction in the early game so opponents have a fair chance of winning. As Cass players learned to play around their bootless immobility, those windows have gradually closed. With finer mastery over their combat ranges, Cassiopeia players are now controlling too much of the battlefield from too far a distance, all the while sustaining through the damage opponents do manage to land. We’re heightening the risks Cassiopeia needs to take in lane to re-open those windows of interaction necessary to justify her late-game hyperscaling.

Serpentine Grace.png Passive - Serpentine Grace

AN UNNECESSARY PATCH NOTE : Cassiopeia still can’t wear boots. We thought you’d like to know.

Miasma.png W - Miasma

CAST RANGE : [900] 800

Twin Fang.png E - Twin Fang

HEALING ON POISONED TARGETS : [5/10/15/20/25] 5-22 (at levels 1-18)

Q and W ranges up. W cooldown decreased.

One of the larger Midseason mage updates, Cassiopeia’s strengths as an immobilizing controller have been muted by a rather weak release state. Low ranges across her poisons appear to be the culprit, as Cassi quite literally lives or dies on her ability to access Noxious Blast’s burst of speed (or Miasma’s grounding). Add in some bonus usability to her poisons and Cassiopeia will see herself actually able to play her keep-away kite game without being overrun.

Noxious Blast.png Q - Noxious Blast

RANGE : [750] 850
SAVOR THE MOMENT : Noxious Blast’s movement speed bonus takes longer to decay
POISONOUS CLARITY : “Poisoned” particle’s size has been increased

Miasma.png W - Miasma

COOLDOWN : [22/20/18/16/14 seconds] 18/17/16/15/14 seconds
MINIMUM RANGE : [550] 500
MAXIMUM RANGE : [800] 900
BRINGING IT BACK : No longer stops upon hitting terrain

5/9/2016 Balance Update

Cassiopeia's update shaved a little too much power off of Twin Fang. Rather than raw damage buffs, we're giving back a bit of its uptime.

Twin Fang.png E - Twin Fang

Cooldown : [0.9 seconds] 0.75 seconds
COST : [60/65/70/75/80 mana] 40/45/50/55/60 mana
RANGE : [550 (from Cassiopeia's hitbox edge to her opponent's)] 700 (from Cassiopeia's hitbox center to her opponent's.) Overall, slight increase against small targets and slight decrease against large targets.


True to her half-snake nature, Cassiopeia bears twin identities of “poison mage” and “lightning-fast viper strikes.” However, the high-input gameplay of Twin Fang has left Cassiopeia wanting for greater impact in her poisons, instead viewing them as a gating condition for her combo damage.

Rather than giving her more damaging poisons (Singed has that market cornered), we’ve sharpened Cassiopeia’s poison fantasy by linking Miasma to another snake fantasy: immobilization. The new Miasma lets Cassiopeia weaponize her own immobility by bringing opponents to her level. By limiting the ability power of champions to leave her kill zone, Cassiopeia dictates the ranges of an engagement, keeping foes at a distance where she can wail on them safely. Should her opponents play around Miasma, however, Cassiopeia loses that control and faces swift punishment from the champions she sought to keep at bay.


SMALL SCALE ADJUSTMENTS : Several of Cassiopeia’s other base stats have been slightly adjusted
ICONS : Cassiopeia has all-new ability icons

Serpentine Grace.png Passive - Serpentine Grace

SNAKES DON’T NEED BOOTS : Cassiopeia gains 4 movement speed per level. Cassiopeia cannot purchase Boots items.

Noxious Blast.png Q - Noxious Blast

COST : [40/50/60/70/80 mana] 60/65/70/75/80 mana
COOLDOWN : [4 seconds] 3.5 seconds
DAMAGE : [75/115/155/195/235] 75/120/165/210/255
RATIO : [0.45 ability power] 0.7 ability power
CAST RANGE : [850] 750
BONUS MOVEMENT SPEED ON HIT : [20%] 30/35/40/45/50%, decaying over the duration

Miasma.png W - Miasma
Cassiopeia spews venom in an arc in front of her, leaving toxic clouds fofew seconds. Enemies in the cloud are continually poisoned, slowing and Grounding them, prohibiting the use of movement abilities.

COST : 70 mana
COOLDOWN : 22/20/18/16/14 seconds
DURATION : 5 seconds
DAMAGE : 20/35/50/65/80 per second
RATIO : 0.15 ability power per second
SLOW : 40/50/60/70/80%, decaying over the duration
RANGE : 550-800

Twin Fang.png E - Twin Fang

COST : [50/60/70/80/90 mana] 60/65/70/75/80 mana
COOLDOWN : [5 seconds] 0.9 seconds
DAMAGE : [55/80/105/130/155] 52-120 (at levels 1-18)
RATIO : [0.55 ability power] 0.1 ability power
COOLDOWN RESET No longer reduces the cooldown to 0.5 seconds upon hitting a poisoned target
MANA POSITIVE No longer refunds an additional 1.5% of Cassiopeia’s maximum mana on kill (still refunds 100% of the cost)
SNAKE BITE If the target is Poisoned, Twin Fang deals an additional 10/40/70/100/130 (+0.35 ability power) damage
HEAL If the target is Poisoned, Twin Fang also heals Cassiopeia for 5/10/15/20/25
HEAL RATIO : 0.1 ability power

Petrifying Gaze.png R - Petrifying Gaze

COOLDOWN : [120/110/100 seconds] 120/100/80 seconds
SLOW : [60% on targets facing away] 40% on targets facing away


"These are two changes aimed at two different things, so we'll explain. First, while we did intend for late-game Cass to be an unstoppable force of a half-snake, the scaling heal on Twin Fang makes her borderline unkillable for some team compositions (particularly given her zone control). Second, when we were looking for ways to trim power on Cass, we saw that her champion update came right before our big refactor of the mana regeneration stat of the 2015 season (with most champions ending up with less mana regen in general). Given that these original numbers were tuned around competing mid-laners of the time (and higher baseline mana regeneration expectations like Athene's Unholy Grail), we decided to modernize accordingly. Cassi's still going to hit like a truck in the lategame - we just wanted to give more windows of opportunity for opponents to take advantage."
  • Aspect of the Serpent.png Passive - Aspect of the Serpent
    • PASSIVE BONUS : At 100 stacks, Twin Fang heals for6/8/10/12/14/16 +0.1 ability power +0.06 ability power
  • Twin Fang.png E - Twin Fang
    • MANA REFUND : If Twin Fang kills the target, it refunds its mana cost plus 3% of Cassiopeia's maximum mana 1.5% of Cassiopeia's maximum mana

Cassiopeia gets less AP when combined with %AP amplifying effects

"Last patch we modified how the first Dragon buff interacts with Rabadon's Deathcap (from multiplicative to additive, with an expected ~1-2% ability power change), but failed to document the larger hit to Cassiopeia, who was tripling (quadrupling?) down on it with her passive, Dragon buff, masteries, and Rabadon's Deathcap. We're documenting it now and realize this is late game Cassi nerf, but we're watching how this shakes out first. "
  • LATE GAME CASSI NERF : Dragon buff and Rabadon's Deathcap now interact additively rather than multiplicatively. When these two ability power % modifications (and masteries) interact with Cassiopeia passive, they now give roughly ~12% less bonus ability power at late, late game.

Q and E have higher mana costs.

"As a lane bully, one wrong move against Cassiopeia can lose you a ton of HP and send you ducking for cover beneath your tower (or just packing your bags and going home). While it's not impossible to fight back, Aspect of the Serpent's healing just reinforces this non-stop lane bully tactic without much in terms of tradeoffs (thanks to Twin Fang's mana recovery). Increasing Cass's mana costs on Q and E should make it more of a calculated decision to harass or sustain, giving savvy opponents more time to formulate a counter-attack (or at least walk back to lane)."
  • Noxious Blast.png Q - Noxious Blast
    • COST : 40/45/50/55/60 mana 40/50/60/70/80 mana
  • Twin Fang.png E - Twin Fang
    • COST : 35/45/55/65/75 mana 50/60/70/80/90 mana
    • CLARITY! : Twin Fang's tooltip now always displays the amount of mana it will restore

Aspect of the Serpent now gains stacks over time and every second an enemy champion is poisoned (rather than on poisoned unit kill or when using Twin Fangs on an enemy champ). Twin Fang now adds a debuff that amplifies poison damage on the target.

"Cassi's recent update definitely gave her the late-game we intended, but at two great costs: her early-game strength, and her identity as a 'Poison Mage.' We're trying to smooth out a bit of Cassiopeia's power here with some early buffs alongside some guaranteed scaling on her passive so that she can hit her early-mid-lategame fantasy (that is now a word) at the appropriate times. In short, we're looking to reach a middle ground between the update and her original feel of killing you slowly with venoms. Just quicker. (And with more venoms)."
  • Aspect of the Serpent.png Passive - Aspect of the Serpent
    • STACK CITY : Cassiopeia builds a stack of Aspect of the Serpent on every poisoned unit kill or on Twin Fang cast on enemy champion once every 6 seconds (10 times per minute) and for every second that an enemy champion is poisoned.
    • IT'S A BUFF WE PROMISE : Cassiopeia gains special bonuses at 75/200/400 stacks 100/250/500 stacks. The new breakpoints will be hit sooner than the old ones based on the new stacking mechanics (above).
  • Noxious Blast.png Q - Noxious Blast
    • EVERYTHING IS NORMAL : Fixed a bug where Noxious Blast's delay wasn't actually normalized (it was hitting anywhere between 0.25 seconds and 0.5 seconds). Now has a flat 0.4 second delay.
    • MOVEMENT SPEED BONUS : 10/15/20/25/30% bonus movement speed 20% bonus movement speed at all ranks
  • Twin Fang.png E - Twin Fang
    • [NEW] LOOK AT THIS SYNERGY : Twin Fang now adds a debuff on the target that amplifies further poison damage by +20% for 5 seconds. This debuff stacks up to 2 times (capping at +40% poison damage).
    • COST : 30/45/60/75/90 mana 35/45/55/65/75 mana
    • RATIO : 0.4/0.45/0.5/0.55/0.6 ability power .55 ability power at all ranks

Some small buffs to Cass's mana, Q's damage scales better with AP, and E's resetting its cooldowns correctly.

"We know Cass isn't doing great on the live environment, but we also want to make sure we don't react too quickly as players are learning a champion and then that champion goes on to demolish everyone (*cough* Kassadin *cough*). Still, we can give Cass a little bump as we watch her being picked up. This might be a conversation we'll revisit next patch! "
  • General
    • BASE MANA 300 ⇒ 330
    • MANA PER LEVEL +50 ⇒ +60
  • Noxious Blast.png Q - Noxious Blast
    • ABILITY POWER RATIO 0.35 ⇒ 0.45
  • Twin Fang.png E - Twin Fang
    • 28.6% MORE FIXED Twin Fang now correctly resets its cooldown to 0.7 seconds ⇒ 0.5 seconds, as indicated by the tooltip

Cassi's received a gameplay update! Focusing on her new passive Aspect of the Serpent, she's now more about stacking up poisons for massive end-game scaling than being a dominant laning force. Mana costs, cooldowns, base damage and ratios have all been mixed up to compensate - read below for the numbers!

"Cassiopeia's high DPS has always sat alongside her poison as defining characteristics of the serpent lady. Historically however, these traits have led to oppressive gameplay that's as challenging for the opponent to deal with as it is to understand (THANKS DAMAGE OVER TIME). To preserve both sides of what makes Cassi unique, we realized we had to modify the relationship between the two.
In this update, the key to Cassiopeia's heavy-hitting damage potential lies within her new passive, Aspect of the Serpent. Cassi builds power throughout the game as she poisons enemy champions, unlocking stat bonuses to fuel her (now more powerful) Twin Fang. This new aspect (heh) of growing her end-game scaling allows us to solidly push her into the 'completely-absurd-damage-potential' space she's currently hanging around. This comes at the cost of some early game power, but make no mistake - you can expect to see a late-game Cassiopeia as one of the most potent damage threats in the League."
  • General
    • TEXTURE UPDATE Cassiopeia's base and skin textures have been updated
    • SPLASH Cassiopeia's base splash art has been updated
    • VO Cassiopeia has received all-new VO
    • BIO Cassiopeia's in-client bio has been updated
  • AspectoftheSerpent.jpg NEW Passive - Aspect of the Serpent

Cassiopeia permanently gains a stack of Aspect of the Serpent for each second that she has poisoned an enemy champion, for each poisoned unit that she kills, and every time she hits an enemy champion with Twin Fang. Caps at 400 stacks.

  • 75 STACKS +5% ability power and Twin Fang restores 6/8/10/12/16 (+0.1 ability power) health
  • 200 STACKS Ability power bonus increased to +10% and Cassiopeia gains 25% cooldown reduction
  • 400 STACKS Ability power bonus increased to +30%
  • NoxiousBlast.jpg Q - Noxious Blast
    • BASE MAGIC DAMAGE 75/115/155/195/235 (unchanged)
    • AP RATIO +0.8 ability power ⇒ +0.35 ability power
    • MOVEMENT SPEED BONUS 10/15/20/25/30%
    • COOLDOWN 4 seconds
    • COST 40/45/50/55/60 mana
  • Miasma.jpg W - Miasma
    • MAGIC DAMAGE PER SECOND 25/35/45/55/65 (+0.15 ability power) ⇒ 10/15/20/25/30 (+0.1 ability power)
    • COOLDOWN 14/13/12/11/10 seconds
    • COST 40/50/60/70/80 mana
    • SLOW 25/30/35/40/45%
  • TwinFang.jpg E - Twin Fang
    • NEW PROBABLY BUILD MANA Now refunds Twin Fang's mana cost plus an additional 3% of Cassiopeia's total mana if Twin Fang kills a unit
    • KIND OF A BIG DEAL Twin Fang's cooldown now resets on cast, rather than on hit
    • BASE MAGIC DAMAGE 55/80/105/130/155
    • AP RATIO 0.55 ⇒ 0.4/0.45/0.5/0.55/0.6
    • COST 30/45/60/70/90 mana
  • PetrifyingGaze.jpg R - Petrifying Gaze
    • SNAKE EYES Now accurately hits units directly in front and on top of Cassiopeia.
    • MAGIC DAMAGE 150/250/350 (+0.5 ability power)
    • COOLDOWN 120/110/100 seconds

Updated Splashes

"As we've mentioned previously, the splash art team is engaged in a long-term effort to update our oldest base splashes. We've got a few more fresh updates for this patch. Yes, this is the same context we used in 4.15. "
  • SPLASH The following champions have received updated base splashes (click the portraits for the full image!):

v4.15 (Twisted Treeline)

"Miasma can be a bit overbearing on Twisted Treeline. This change, combined with the nerf to TT's mana regen aura, should make her more reasonable."
  • Miasma.jpg W - Miasma
    • BASE MAGIC DAMAGE PER SECOND 25/35/45/55/65 ⇒ 20/30/40/50/60
    • MAXIMUM POTENTIAL MAGIC DAMAGE 225/315/405/495/585 ⇒ 180/270/360/450/540

v3.12 Context: The cost of Cassiopeia's Petrifying Gaze is too damn high. To remedy this, we've reduced its mana cost at all levels to bring it more in line with other ultimate abilities.

  • Petrifying Gaze
    • Mana cost reduced to 100 (from 120/160/200)


  • Twin Fang
    • Now counts as a single target spell for the sake of items like Rylai's Crystal Scepter.


  • Base Movement Speed increased by 25.


  • Updated art assets


  • Fixed a bug where Miasma's slow was not stacking with many other slows in the game
  • Noxious Blast ability power ratio reduced to 0.8 from 0.9
  • Twin Fang damage reduced to 50 / 85 / 120 / 155 / 190 from 60 / 95 / 130 / 165 / 200


  • Miasma now gives persistent vision in the area where cast


  • Twin Fang cast animation sped up
  • Petrifying Gaze
    • Cast animation sped up
    • Cast range increased to 850 from 700 (effect now roughly matches the particle)
    • Damage increased to 200 / 325 / 450 from 150 / 275 / 400
    • Cooldown reduction with rank is now reflected in the levelup tooltip
    • More accurately targets enemies that move in/out of the area during the cast time


  • Updated tooltips


  • Twin Fang range increased to 700 form 675


  • Base movement speed increased to 310 from 305
  • Noxious Blast movement speed buff increased to 3 seconds from 2
  • Twin Fang ability power ratio increased to 0.55 from 0.45
  • Petrifying Gaze
    • Slow increased to 60% at all levels from 40 / 50 / 60%
    • Cooldown changed to 130 / 120 / 110 seconds from 120 at all levels

CassiopeiaSquare.png Cassiopeia released

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