How to win lane as Sejuani against Sion · 50.18% win rate (1,140 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Tank mirror — nobody dies; win the wave, the plates, and the first river fight.
Track: Sion's Q — Decimating Smash (10–6s cooldown). Charged knockup — break the channel or sidestep the slam.
Read from Sejuani's seat: which stage windows this plan plays for against Sion.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Even / skill | Both champions are weak at Level 1 with no combo — take W, last-hit safely, and deny him any free shove advantage. |
| Level 2 | Even / skill | You can threaten a Q knock-up trade if his Decimating Smash is clearly on cooldown, but avoid dashing into a winding-up Q. |
| Level 3 | Sejuani | Your Q-W-E full combo stuns him before he can retaliate, but only when his W shield is down — time the engage around its cooldown. |
| Levels 4-5 | Even / skill | Neither of you has damage that scales with raw levels; trade when both his Q and W are spent, otherwise stack your passive resistances. |
| Level 6 | Even / skill | Glacial Prison at Level 6 is a 1300-range projectile stunning the first champion hit, and Sion is too slow to sidestep it — chain E on landing. |
| First item | Even / skill | Sunfire Aegis or Heartsteel brings your trade damage high enough that a full CC chain after his first-item spike threatens a kill, not just a health lead. |
| Two+ items | Even / skill | You both become teamfight assets rather than duelists; your R placement onto carries wins fights, but never blow it into Sion knowing his zombie passive can absorb the follow-up. |
At Level 1 take W and play purely for CS — Sion is equally weak and his Q has a long wind-up telegraph, so you are not getting punished if you respect that animation. At Level 2 you can threaten a Q knock-up trade if his Decimating Smash is visibly on cooldown, but commit only if you are certain, because a charged Q into your Arctic Assault dash wins him the exchange. Level 3 is your first real agency: Q dash to close gap, W twice to stack Frost and slow him, then E to stun — do not throw this at a Sion who just raised his shield, wait for it to pop or time out.
Pooled Emerald+ win rates from Sejuani's side, sampled July 2026.
The full Sejuani vs Sion 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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Nobody on paper — a 50.18% win rate over 1,140 games makes this a coin flip decided by play, not champion select.
Yes — Sejuani vs Sion is a genuine skill matchup: 50.18% win rate, and the favour swings window to window rather than being set at champion select.
No hard counter either way — the Sejuani vs Sion win rate is 50.18%, an even lane decided by execution.
Sejuani takes Grasp of the Undying on the Resolve tree with Demolish, Second Wind and Overgrowth, and Inspiration secondary (Biscuit Delivery and Cosmic Insight) vs Sion.
Start Doran's Shield + 1 Health Potion and back for Giant's Belt (≈900g) — start Sunfire Aegis. Build Sunfire Aegis first, then Thornmail / Kaenic Rookern (by damage type), with Plated Steelcaps.
Playing the other side? Sion vs Sejuani guide →
All Sejuani top lane matchups →
More Sejuani top lane matchups: vs Sett · vs Shen · vs Singed · vs Swain · vs Sylas · vs Tahm Kench