Swain vs Cassiopeia — Mid Lane Matchup Guide

How to win lane as Swain against Cassiopeia · 50.34% win rate over 147 Emerald+ games · Updated 2026-07-27

Verdict: Cassiopeia is favoured — Cassiopeia owns 6 of the 7 game windows. Play it patient and win your windows. Swain wins 50.34% of games vs Cassiopeia in mid lane (147 Emerald+ games analysed).

Favour timeline — who owns each window

StageFavouredWhy
Level 1CassiopeiaCassiopeia's Miasma zoning and Twin Fang poke beat your level 1.
Level 2Even / skillLevel 2 is a brief skill window before her poison scaling takes over.
Level 3CassiopeiaAt level 3 Twin Fang sustain-DPS out-drains your short-range Q.
Levels 4-5CassiopeiaLevels 4-5 stay hers as move speed dodges your E and poison chunks you.
Level 6CassiopeiaAt 6 her Petrifying Gaze stuns and hard-counters your Ascension dive.
First itemCassiopeiaFirst-item Twin Fang chain out-sustains your Flock and melts your HP.
Two+ itemsCassiopeiaTwo items make Cassiopeia a scaling DPS you can't duel through poison.

Early game (levels 1–5)

Level 1 you can contest, but by level 2-3 Cassiopeia snowballs the lane with Miasma zoning and Twin Fang poke that beats your short-range Q. Concede CS to poison rather than trading into her scaling damage and superior kiting.

Read the rest of this matchup

The full Swain vs Cassiopeia report continues with the mid-game plan, the late-game and teamfight plan, every power spike to play around, and the win conditions for both sides — plus cooldown tracking and the live enemy-jungle tracker inside the app.

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Related guides

Playing the other side? Cassiopeia vs Swain guide →
All Swain mid lane matchups →

Also played in: Top Lane