Cassiopeia ARAM Mayhem Build

The Serpent's Embrace. A below-average pick in ARAM Mayhem on patch 26.21: #160 of 173 champions.

CPatch 26.21MageNo runes in Mayhem

Tier: C
Win rate: 45.8%
Pick rate: 2.1%
Rank: #160 of 173
Games: 475,533
Patch: 26.21

How to play Cassiopeia in ARAM Mayhem

Cassiopeia is a below-average pick in ARAM Mayhem on patch 26.21: tier C, #160 of 173 champions, with a 45.8% win rate over 475,533 games. Riot rates it 10/10 for difficulty, so give it a few games before you judge it.

90% of Cassiopeia's damage to champions is magic, so enemy magic resist is what slows it down.

The AP build, ability power items, is both the most played and the top-ranked path: Rod of Ages, Liandry's Torment and Archangel's Staff, with a 46.3% win rate over 347,604 games. On this build 43% of players skip boots and spend the slot on another item.

The cards that do best on Cassiopeia are Blue Barrier, Omni Soul and Mad Scientist. Cards built around movement speed fill most of the top of its list, followed by ability haste. Most of its S-tier cards are prismatic, so a prismatic offer is often the pick that shapes the game. Skip Snowblast and Upgrade Sheen when you can: they do worst on Cassiopeia. A pair to look for: Back To Basics with Omni Soul.

Take Flash and Ghost (63% of players). Max E (Twin Fang) first, then Q, then W.

Cassiopeia ARAM Mayhem build

ARAMKit groups every Cassiopeia game by build path. The top-ranked path comes first, with the items most players start with, buy first and add later.

AP build · top ranked

46.3% win rate · 84% of Cassiopeia games · 347,604 games

Start

Lost Chapter

Core items, in buying order

Rod of Ages
Liandry's Torment
Archangel's Staff

Boots on the AP build for Cassiopeia, top ranked first, with the share of players who buy them
Boots, best first	Players
Boots of Swiftness	6%
Sorcerer's Shoes	30%
Gluttonous Greaves	17%

Situational, after the core

Rabadon's Deathcap29% buy it
Rylai's Crystal Scepter42% buy it
Riftmaker20% buy it
Void Staff8% buy it
Blackfire Torch5% buy it
Shadowflame10% buy it

Most bought items

Liandry's Torment76% of games
Archangel's Staff69% of games
Rod of Ages65% of games
Rylai's Crystal Scepter57% of games
Rabadon's Deathcap30% of games
Sorcerer's Shoes30% of games
Blackfire Torch23% of games
Riftmaker20% of games
Shadowflame18% of games
Gluttonous Greaves17% of games

Best augments for Cassiopeia

Every card with enough Cassiopeia games, by tier and best first within each tier. Tiers are Cassiopeia's own: a card can be S tier here and C tier on another champion. As Riot's policy asks, cards are shown by tier and order only, never with a win rate. Click a card for its own page; the augment tier list ranks them over all champions.

PrismaticBest prismatic cards

GoldBest gold cards

SilverBest silver cards

1Blue BarrierTier S
2ErosionTier S
3Don't BlinkTier A

S- and A-tier cards for Cassiopeia

10 S tier and 32 A tier, best first.

The S- and A-tier augments for Cassiopeia in ARAM Mayhem, best first, with their rarity and what they do
Augment	Rarity	Tier	What it does
Blue Barrier	Silver	Tier S	Gain 200–450 (by level) % of the Max Mana Mana you spend as a Shield for 1.5 seconds. Shields up to 300–800 (by level)
Omni Soul	Prismatic	Tier S	Gain 3 random Dragon Souls.
Mad Scientist	Prismatic	Tier S	On each Revive, you grow large (gaining 30% Adaptive Force and 20% Health) or tiny (gaining 70 Ability Haste and 40% Movement Speed).
Hand of Baron	Prismatic	Tier S	Gain 25% Adaptive Force. Nearby allied minions are greatly empowered.
Giant Slayer	Prismatic	Tier S	Become tiny, gain 20% Movement Speed, and deal between 10% and 30% bonus damage to champions based on how much larger they are than you.
Phenomenal Evil	Gold	Tier S	Permanently gain 1 Ability Power when you damage enemy champions with Abilities. If taken as your second Augment, starts with 40 Ability…
Infernal Conduit	Prismatic	Tier S	Your Abilities apply an infinitely stacking Burn, dealing (2–20 (by level) +1.2% Ability Power +2.8% Bonus Attack Damage) magic damage per…
Erosion	Silver	Tier S	Damaging enemies shreds 1.5% Armor and Magic Resist for 4s, up to 30% at 20 stacks.
En Passant	Prismatic	Tier S	Periodically identify Vitals on enemy champions. Hitting Vitals with Attacks or Abilities deals an additional 6% + 1.5% per stack max Health…
Tripleshot	Prismatic	Tier S	Your selected ability targets 2 additional enemies in front of you. Units take less damage from the same spell.
Don't Blink	Silver	Tier A	Gain 1% bonus damage per 10 Movement Speed more you have than the target.
Infinite Recursion	Prismatic	Tier A	Gain 60 Ability Haste, plus 3 Ability Haste per takedown.
Leg Day	Silver	Tier A	Gain 50 Movement Speed and 50% Slow Resist.
Mind to Matter	Silver	Tier A	Gain (50% Max Mana) Health.
Eureka	Prismatic	Tier A	Gain (30% Ability Power) Ability Haste.
Homeguard	Silver	Tier A	Gain 100% Movement Speed, disabled for 6 seconds after taking damage.
Final Form	Prismatic	Tier A	After casting your Ultimate, gain a 50% max Health Shield, 20% Omnivamp and 30% bonus Movement Speed for 10 seconds. (20 seconds Cooldown).
Escape Plan	Silver	Tier A	Gain a massive (65% Max Health) decaying Shield, decaying 150% Movement Speed, and a decaying shrink effect upon reaching 35% Health (75…
Shrink Engine	Gold	Tier A	Takedowns grant a stack that makes you 4% smaller, grants 8 Ability Haste, and 1% Movement Speed. Lose 65% stacks on death…
Magic Missile	Gold	Tier A	Dealing Ability damage fires 3 missiles at each enemy hit, each dealing up to 1% max Health true damage based on distance traveled.
Back To Basics	Prismatic	Tier A	Your Ultimate Ability is sealed. Gain 35% Ability Damage, Healing, Shielding, and 70 Ability Haste.
From Beginning To End	Gold	Tier A	Gain the First Strike and Dark Harvest Keystone Runes. First Strike: When you initiate champion combat, deal 10% extra damage for 3 seconds…
The Boom and the Bass	Gold	Tier A	After casting an Ability, your next Attack within 6 seconds is faster, deals Melee (50–200 (by level) +50% Bonus Attack Damage+30% Ability…
Twin Fire	Silver	Tier A	On ability damage, fire 1 plus (3% Critical Strike Chance) missiles that deal (10–30 (by level) +7% Bonus Attack Damage+7% Ability Power)…
Warlock Juicebox	Gold	Tier A	Gain (10%+3.5% Ability Power) Omnivamp.
Forged By The Master	Silver	Tier A	Your Item and Augment damage are increased by 45%.
Weapon of Destiny	Gold	Tier A	Your first Legendary Item becomes the Weapon of Destiny. When a champion you damaged within the last 3 seconds dies, increase the Weapon of…
Ocean Soul	Silver	Tier A	Gain the Ocean Soul, granting high Health and Mana Regen after damaging enemies.
Wooglet's Witchcap	Prismatic	Tier A	QUEST: Possess Rabadon's Deathcap and Zhonya's Hourglass. REWARD: Get Wooglet's Witchcap.
BEES!!!	Gold	Tier A	Every 15–10 (by level) seconds, your next Ability hit against an enemy champion throws a beehive at the target. Upon arriving, the hive…
Fruitify	Silver	Tier A	Scoring a Takedown causes the slain champion to explode into 3–6 (by level) Fruit. Fruit restores 6% of your maximum health and restores 6%…
Stats on Stats on Stats!	Prismatic	Tier A	Gain 4 Stat Anvils, with a higher chance of Gold and Prismatic Anvils! On your next Augment selection, gain one additional reroll per slot.
With Haste	Gold	Tier A	Gain (70% Ability Haste) Move Speed.
Overflow	Gold	Tier A	Your Mana costs double. Your Ability Heals, Shields, and damage are (10%+0.5% Max Mana) more effective.
Double Time	Gold	Tier A	Damaging an enemy champion with 2 separate Abilities within 4 seconds deals (10% Max Mana) magic damage and grants 25 max Mana. 4 second…
Big Brain	Gold	Tier A	Gain a (300% Ability Power) Shield. Resets on death or 70 seconds after depletion.
Goredrink	Silver	Tier A	Gain 15% Omnivamp.
Transmute: Prismatic	Gold	Tier A	Gain a random Augment Tier Prismatic Augment.
Donation	Gold	Tier A	Receive 1750 Gold. Thanks chat!:)
Take'em Down Down Down	Gold	Tier A	Attacks and Abilities apply a stack to enemy champions for 5 seconds and deal Melee (5–30 (by level) +35% Bonus Attack Damage+15% Ability…
Recursion	Gold	Tier A	Gain 60 Ability Haste.
Trusty Weapon	Silver	Tier A	When you strike an enemy champion with selected ability, forge a bond of Friendship that grants it 5% increased damage for 6 seconds. This…

Average on Cassiopeia
57 cards, best first

Below average on Cassiopeia
24 cards, best first

Weakest on Cassiopeia
12 cards, best first

Best first augment for Cassiopeia

Your first card decides the early fights, and a card that is great as a first pick can be a weak fourth. ARAMKit ranks Cassiopeia's cards for each pick on its own; these are the top five per pick, with their tier in that pick. For the first pick, Infernal Conduit, Tripleshot and Phenomenal Evil come out on top.

The best augments for Cassiopeia in each pick of an ARAM Mayhem game, best first, with their tier in that pick
#	First pick	Second pick	Third pick	Fourth pick
1	Infernal ConduitTier S	Bread And ButterTier S	Hand of BaronTier S	Don't BlinkTier S
2	TripleshotTier S	Blue BarrierTier S	Blue BarrierTier S	En PassantTier S
3	Phenomenal EvilTier S	Bread And JamTier S	Leg DayTier A	Omni SoulTier S
4	Blue BarrierTier S	Giant SlayerTier S	Mad ScientistTier A	Blue BarrierTier S
5	Mind to MatterTier S	ErosionTier A	Omni SoulTier A	With HasteTier S

Strong card pairs

Two cards that do especially well together on Cassiopeia, best pair first.

Summoner spells and skill order

Summoner spells

Flash + Ghost63% of players · 46.4% win rate
Flash + Clarity2% of players · 47.0% win rate
Ghost + Mark0% of players · 48.1% win rate

Skill order

ETwin Fang
QNoxious Blast
WMiasma

Max E first. 67% of players use this order (46.7% win rate); put points in R whenever you can.

Cassiopeia in an average Mayhem game

Averages per game over every game on this patch.

K / D / A: 10.1 / 11.1 / 25.0
KDA: 3.52
Damage to champions: 36,193
Damage taken: 38,604
Self-mitigated: 21,747
Healing on allies: 14
Shielding on allies: 0
Crowd control: 45 s
Kill participation: 64%
Game length: 17:00

Damage type

Physical 4%Magic 90%True 6%

Questions and answers

What is the best Cassiopeia build in ARAM Mayhem?

On patch 26.21 ARAMKit ranks the AP build first for Cassiopeia: Rod of Ages, Liandry's Torment and Archangel's Staff. It is also the most played build.

What are the best augments for Cassiopeia in ARAM Mayhem?

The S-tier cards for Cassiopeia, best first: Blue Barrier, Omni Soul, Mad Scientist, Hand of Baron and Giant Slayer. The full list by tier is on this page.

Is Cassiopeia good in ARAM Mayhem?

Cassiopeia is tier C on patch 26.21, #160 of 173 champions, with a 45.8% win rate over 475,533 games. That makes it a below-average pick in ARAM Mayhem right now.

What is the best first augment for Cassiopeia in ARAM Mayhem?

For Cassiopeia's first pick on patch 26.21: Infernal Conduit, Tripleshot, Phenomenal Evil, Blue Barrier and Mind to Matter, best first. Cards rank differently in later picks; the table on this page has all four.

Other Mages in ARAM Mayhem

Get Cassiopeia's build and card tiers in your game

LazyElo is a free Windows app that sits next to the League client. In the Mayhem lobby it shows which champion on your bench is strongest; in the game you type the three cards you're offered and see their tier for Cassiopeia side by side, with this build in the overlay.

Download LazyElo for Windows

Free plan, no ads. For Windows 10 and 11.

Plans and pricing The ARAM Mayhem overlay

ARAM Mayhem tier list
Every champion by tier on patch 26.21.
ARAM Mayhem augment tier list
Every card from S to D over all champions.
All Mayhem builds
Pick a champion from the full list.
ARAM Mayhem rules
Augment levels, rerolls and why there are no runes.
ARAM Mayhem guide
How the mode, the cards and the picks work.
Cassiopeia counters
Its lane matchups on Summoner's Rift.
ARAM Mayhem overlay
The card picker and build in the app.

Source: ARAMKit, used with permission. Patch 26.21, 23,177,263 ARAM Mayhem games, data of October 28, 2026. Riot keeps Mayhem games out of its public match API, so these aggregates come from ARAMKit. Card tiers are shown without win rates, as Riot's developer policy asks.