How to win lane as Sejuani against Cassiopeia · 50.63% win rate over 79 Emerald+ games · Updated 2026-07-27
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Cassiopeia | Cassiopeia's Noxious Blast (Q) poisons you at range before Arctic Assault can close, and Twin Fang spam on a poisoned target strips Permafrost armor off instantly — you have no safe trade pattern at Level 1. |
| Level 2 | Cassiopeia | She can Q-poison and spam Twin Fang freely at Level 2 while you need to close to melee range to stack Frost with Winter's Wrath — the gap is too wide and her DPS is too high. |
| Level 3 | Cassiopeia | Your Level 3 Q-W-E combo requires touching her, but Miasma grounds Arctic Assault in the dash path and Petrifying Gaze punishes any failed engage — she controls whether the fight even happens. |
| Levels 4-5 | Even / skill | Neither of you has a clean answer: her Q-TwinFang poke is consistent but your passive Permafrost armor absorbs small trades, and Miasma can be walked around with patient footwork; the window is genuinely contested. |
| Level 6 | Cassiopeia | Cassiopeia's Level 6 Petrifying Gaze stuns you if you face her mid-engage, turning your Arctic Assault into a free kill window for her — she wins the Level 6 spike if she lands the face-stun. |
| First item | Sejuani | Sunfire Aegis gives you enough contact durability to survive a Q-poison cycle and land the full Permafrost stun chain — with a completed item your CC output outpaces her sustained DPS. |
| Two+ items | Sejuani | At two items your CC uptime (Glacial Prison blizzard into Permafrost stun) keeps her locked long enough that Twin Fang never gets the sustained window it needs — you win the teamfight even as she scales. |
She owns Levels 1 through 5 without contest — Noxious Blast applies poison from well outside Arctic Assault range, and she refreshes Twin Fang near-infinitely on any poisoned target, eating through your Permafrost armor faster than the passive restores it. Take Doran's Shield, Second Wind, and sit behind the wave. Do not step up to trade: every auto-attack pattern you attempt lets her Q you freely and she will always win the sustained DPS exchange. Your job in this window is to arrive at Level 6 with enough HP that Glacial Prison is a threat, not a desperation play.
The full Sejuani 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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Playing the other side? Cassiopeia vs Sejuani guide →
All Sejuani top lane matchups →