Champions › Cassiopeia
Cassiopeia Mid Build, Patch 26.20 — Runes, Ability Damage & ARAM Buffs/Nerfs
the Serpent's Embrace · AP damageMageBattlemageMid
Every number below is computed from Riot's official game data for patch 26.20 — the Worlds 2026 patch (Data Dragon, with Meraki Analytics ability values and Riot's published ARAM balance), not sampled from match histories. Open the interactive labs to test Cassiopeia against any opponent at any level.
Damage LabLaning matchupBuild LabARAM sheet
Cassiopeia build and runes (Mid, patch 26.20)
Item order
- Rabadon's Deathcap
- Spellslinger's Shoes
- Zhonya's Hourglass
- Shadowflame
- Dusk and Dawn
- Riftmaker
Start: Doran's Ring, Health Potion
Situational: —
Rune page
Domination · keystone Electrocute
Cheap Shot, Sixth Sense, Treasure Hunter
Secondary: Axiom Arcanist, Transcendence
Summoners: Flash, Ignite · Skill order: Q > E > W
Cassiopeia is classified AP from its ability scalings; itemization computed from Rabadon's Deathcap + current-patch item stats. Win-rate shown is an estimate and does not drive the build.
Cassiopeia base stats by level
| Level | Health | Attack damage | Armor | Magic resist | Attack speed |
|---|---|---|---|---|---|
| Level 1 | 610 | 53.0 | 18.0 | 32.0 | 0.647 |
| Level 6 | 997 | 64.8 | 36.6 | 37.1 | 0.685 |
| Level 11 | 1,470 | 79.3 | 59.2 | 43.4 | 0.732 |
| Level 18 | 2,276 | 104.0 | 97.9 | 54.1 | 0.812 |
Growth follows Riot's per-level curve: value = base + growth × (n−1) × (0.7025 + 0.0175 × (n−1)).
Cassiopeia ability damage per rank
Q — Noxious Blast magic
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | 75 | 110 | 145 | 180 | 215 |
| Cooldown (s) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
Scaling: 65/65/65/65/65% AP.
Cassiopeia Q damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 1 | rank 1 | 75.0 | 3.5s |
| Level 3 | rank 2 | 110.0 | 3.5s |
| Level 6 | rank 3 | 145.0 | 3.5s |
| Level 9 | rank 5 | 215.0 | 3.5s |
| Level 11 | rank 5 | 215.0 | 3.5s |
| Level 13 | rank 5 | 215.0 | 3.5s |
| Level 16 | rank 5 | 215.0 | 3.5s |
| Level 18 | rank 5 | 215.0 | 3.5s |
W — Miasma magic
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | 100 | 125 | 150 | 175 | 200 |
| Cooldown (s) | 24.0 | 22.0 | 20.0 | 18.0 | 16.0 |
Scaling: 50/50/50/50/50% AP.
Cassiopeia W damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 1 | rank 1 | 100.0 | 24.0s |
| Level 3 | rank 2 | 125.0 | 22.0s |
| Level 6 | rank 3 | 150.0 | 20.0s |
| Level 9 | rank 5 | 200.0 | 16.0s |
| Level 11 | rank 5 | 200.0 | 16.0s |
| Level 13 | rank 5 | 200.0 | 16.0s |
| Level 16 | rank 5 | 200.0 | 16.0s |
| Level 18 | rank 5 | 200.0 | 16.0s |
E — Twin Fang magic
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | 52 | 56 | 60 | 64 | 68 |
| Cooldown (s) | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
Scaling: 65/65/65/65/65% AP.
Cassiopeia E damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 1 | rank 1 | 52.0 | 0.8s |
| Level 3 | rank 2 | 56.0 | 0.8s |
| Level 6 | rank 3 | 60.0 | 0.8s |
| Level 9 | rank 5 | 68.0 | 0.8s |
| Level 11 | rank 5 | 68.0 | 0.8s |
| Level 13 | rank 5 | 68.0 | 0.8s |
| Level 16 | rank 5 | 68.0 | 0.8s |
| Level 18 | rank 5 | 68.0 | 0.8s |
R — Petrifying Gaze magic
| Rank | R1 | R2 | R3 |
|---|---|---|---|
| Base damage | 150 | 250 | 350 |
| Cooldown (s) | 120.0 | 100.0 | 80.0 |
Scaling: 50/50/50% AP.
Cassiopeia R damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 6 | rank 1 | 150.0 | 120.0s |
| Level 9 | rank 1 | 150.0 | 120.0s |
| Level 11 | rank 2 | 250.0 | 100.0s |
| Level 13 | rank 2 | 250.0 | 100.0s |
| Level 16 | rank 3 | 350.0 | 80.0s |
| Level 18 | rank 3 | 350.0 | 80.0s |
Cassiopeia ARAM buffs & nerfs (Howling Abyss balance modifiers)
Cassiopeia plays with Summoner's Rift numbers — no ARAM-specific balance.
| ARAM modifier | Value |
|---|---|
| Damage dealt | — |
| Damage taken | — |
| Healing | — |
| Shielding | — |
| Attack speed | — |
| Ability haste | — |
| Tenacity | — |
| Energy regen | — |
ARAM also starts champions at level 3 with 1,400 gold. The ARAM sheet applies these modifiers to every stat and ability side by side with Summoner's Rift.
Frequently asked
What is the best Cassiopeia build on patch 26.20?
RiftLab's stat-driven build for Cassiopeia Mid is Rabadon's Deathcap, Spellslinger's Shoes, Zhonya's Hourglass, Shadowflame, Dusk and Dawn, Riftmaker, with Electrocute as the keystone. It is computed from the champion's damage profile and the opponent's resists, not from win-rate scraping.
Does Cassiopeia have ARAM modifiers?
No. Cassiopeia plays with Summoner's Rift numbers on ARAM; Riot has not given Cassiopeia ARAM-specific balance on patch 26.20.
How much damage does Cassiopeia's Noxious Blast do?
Cassiopeia's Q (Noxious Blast) has a base damage of 75/110/145/180/215 across its ranks and scales with 65/65/65/65/65% AP. Before the target's resistances; use the Damage Lab for the mitigated number against a specific opponent.
How much health does Cassiopeia have at level 18?
Cassiopeia has 2,276 base health, 97.9 armor and 54.1 magic resist at level 18 with no items, on patch 26.20.
Data: Riot Data Dragon 26.20, Meraki Analytics, LoL Wiki ARAM table. Builds are stat-driven recommendations from RiftLab's optimizer, not win-rate aggregates.