Matchup

Heavy AP damageSustained DPSHeavy CC

Build vs Cassiopeia

Build adapted to this matchup

Starting items

Health Potion
x2

Core build

Tear of the Goddess
1
Locket of the Iron Solari
2HP
Fimbulwinter
3Survival

Standard

Boots of Swiftness
4vs Slow
Solstice Sleigh
5HP

Summoner spells

34100%

Anti AD

Plated Steelcaps
4vs AD
Knight's Vow
5vs AD

Anti Heal

Thornmail
6vs Hybride

Anti AP

Mercury's Treads
4vs CC
Bandlepipes
5vs Hybride
Force of Nature
vs AP

Other options

Solstice Sleigh
HP
Ardent Censer
Moonstone Renewer
HP
InspirationInspiration
Glacial AugmentGlacial Augment
Hextech FlashtraptionHextech Flashtraption
Biscuit DeliveryBiscuit Delivery
Cosmic InsightCosmic Insight
ResolveResolve
ConditioningConditioning
RevitalizeRevitalize
Attack SpeedHealth ScalingHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
TaricTaric
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