Cassiopeia vs Swain — Mid Lane Matchup Guide

How to win lane as Cassiopeia against Swain · 52.47% win rate over 465 Emerald+ games · Updated 2026-07-27

Verdict: Cassiopeia is favoured — Cassiopeia owns 6 of the 7 game windows. Cassiopeia wins 52.47% of games vs Swain in mid lane (465 Emerald+ games analysed).

Favour timeline — who owns each window

StageFavouredWhy
Level 1CassiopeiaYour poke range and poison DoT start winning trades once his root-E is on cooldown
Level 2Even / skillHis root-E into Q pull is a genuine even skill-check window for short trades pre-6
Level 3CassiopeiaPast his root cooldown your damage output clearly outpaces his kit
Levels 4-5CassiopeiaSame trend continues as your stacking poison outvalues his sustain
Level 6CassiopeiaEven his Ult sustain can't offset how hard you out-damage him at range
First itemCassiopeiaYour completed items let your burst-DoT rotation kill him before his healing catches up
Two+ itemsCassiopeiaFull-build Cassiopeia denies his Ult zone entirely and wins every extended fight

Early game (levels 1–5)

Level 1-2 is close to even since his root-E threatens short trades, but by level 3 your poison stacking and range advantage start winning skirmishes outright, so play a touch cautious only before his root is up.

Read the rest of this matchup

The full Cassiopeia vs Swain 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? Swain vs Cassiopeia guide →
All Cassiopeia mid lane matchups →

Also played in: Top Lane