How to win lane as Cassiopeia against Sejuani · 45.95% win rate over 37 Emerald+ games · Updated 2026-07-27
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Cassiopeia | Sejuani has no ranged or point-and-click harass, so you freely Q-poke and Twin Fang an immobile tank as she walks up to farm — you own the first levels. |
| Level 2 | Cassiopeia | W (Miasma) grounds her Arctic Assault dash and Glacial Prison, neutering her only engage tools while you keep poking from range — the lane stays yours. |
| Level 3 | Cassiopeia | Your full Q-into-Twin-Fang combo plus Serpentine Grace kiting lets you out-trade her before she has resists or her ult — you control the tempo pre-6. |
| Levels 4-5 | Even / skill | Both ults are up: she can Arctic-Assault-engage and Permafrost-stun, you can R-stun her back — it's a respect standoff where whoever commits first loses. |
| Level 6 | Cassiopeia | Petrifying Gaze stuns her out of an engage when she faces you, and you burst her with poisoned Twin Fang in the freeze window — your one clean kill setup in the lane. |
| First item | Sejuani | Once she stacks a tank item and maxes Winter's Wrath, her resists outlast your single-target Twin Fang and her percent-HP burn out-trades your poke — she stops dying. |
| Two+ items | Sejuani | Late she's a resisted wall with Glacial Prison and a Permafrost stun that catch you, and with no boots or dash you can't escape a chain — she dictates every skirmish. |
Early belongs to me. Sejuani is a slow, immobile tank with no point-and-click harass, so I sit at the tip of my Q, poison her, and chain Twin Fang every time she steps up to farm. She has nothing to trade back at range. My key tool is W (Miasma): the GROUND on it disables her Arctic Assault (E) dash, so if she tries to all-in I drop my cloud on her path and she's stuck walking through poison. I keep my Serpentine Grace move speed rolling, deny her CS, and bully the levels she's weakest.
The full Cassiopeia vs Sejuani 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? Sejuani vs Cassiopeia guide →
All Cassiopeia top lane matchups →