Matchup

Heavy AP damageSustained DPSHeavy CC

Build vs Cassiopeia

Build adapted to this matchup

Starting items

Scorchclaw Pup

Core build

Liandry's Torment
1Mage tank
Shadowflame
2vs Tank
Banshee's Veil
3vs AP

Standard

Boots of Swiftness
4vs Slow
Zhonya's Hourglass
5vs AD

Summoner spells

411100%

Anti AD

Plated Steelcaps
4vs AD
Zhonya's Hourglass
5vs AD

Anti Heal

Morellonomicon
6vs Heal

Anti Tank

Void Staff
5vs Tank

DPS

Rabadon's Deathcap
Mage
Rylai's Crystal Scepter
Mage tank
Cosmic Drive
Mage tank
100.0% WR1 games
PrecisionPrecision
Press the AttackPress the Attack
TriumphTriumph
Legend: HasteLegend: Haste
Coup de GraceCoup de Grace
InspirationInspiration
Triple TonicTriple Tonic
Cash BackCash Back
Attack SpeedAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
ZyraZyra
CassiopeiaCassiopeia
Favorable
Favorable
Passive

Cassiopeia's abilities

Passive, spells and ultimate

Serpentine Grace (P)

All Move Speed bonuses are more effective on Cassiopeia.

Cooldowns

Cooldowns by spell rank

LevelQWER
33.5s24s0.75s
63.5s24s0.75s2m
93.5s22s0.75s2m
113.5s20s0.75s1m40
163.5s16s0.75s1m20
183.5s16s0.75s1m20

Playing against Cassiopeia

How to counter and exploit weaknesses

1

Turn away when she casts her R: you'll be slowed instead of stunned if you're not facing her.

2

Her DPS depends on landing Q (poison) — if she misses Q, she can't effectively spam E.

3

W prevents dashes: do NOT dash into the zone, go around it.

4

Cassiopeia doesn't have boots — slows are particularly effective against her.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026