How to win lane as Sion against Sejuani · 49.82% win rate (1,140 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Bait her key tool — charge Q on the Permafrost cooldown and out-HP the lane.
Track: Sejuani's E — Permafrost. Her stun after Frost stacks. Don't get stacked + stunned.
Read from Sion's seat: which stage windows this plan plays for against Sejuani.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Even / skill | Level 1 is decided by who can auto-trade without getting Frost-stacked into Permafrost — neither side has a clean opener, so last-hit safely and map her stun pattern before committing. |
| Level 2 | Even / skill | Soul Furnace absorbs Winter's Wrath and makes short trades favourable, but Permafrost is already live — and Frost Armor makes her slow-immune, so your E only buys the armour shred. |
| Level 3 | Sejuani | Her full kit is online and her engage completes before yours: Arctic Assault closes, Winter's Wrath stacks Frost, Permafrost stuns. It costs an 18-second Q, so a whiffed charge is your window. |
| Levels 4-5 | Even / skill | Both kits are online but neither has a meaningful item spike — the lane is a pattern-management window, trade around Permafrost's cooldown and freeze for the CS lead. |
| Level 6 | Even / skill | Sejuani's Glacial Prison R turns any all-in lethal: she Arctic Assaults, W-stacks, Permafrost stuns, then R catches you — don't be low HP at 6 and use Unstoppable Onslaught to bail if needed. |
| First item | Even / skill | Her first tank item stacked on Frost Armor's free armour and magic resist blunts your Decimating Smash, while Winter's Wrath rebuilds Frost fast enough to re-stun — she edges the contested first-item window. |
| Two+ items | Even / skill | Two items each, both sides are enormous frontlines — your zombie passive guarantees one last charged-Q knockup even through death, keeping the brawl genuinely even in prolonged teamfights. |
Level 1 is a genuine coin flip — Sejuani's passive Frost stacks build on autos and her W Winter's Wrath tick, so she can set up a Permafrost stun without spending a single extra ability. Don't auto-trade freely; last-hit at Q range and let her show the Permafrost pattern before you commit. At level 2 your W-shield absorbs her Winter's Wrath damage and makes short trades cost her more, but she hits level 3 with the same Frost stacking threat. At level 3 she has her full kit too — Arctic Assault Q to close, W to stack Frost, E to stun — so her engage pattern is complete before yours. Respect that: charge Q from brush angles or behind a pushing wave where the telegraph is hidden, not in the open where she closes with Q and Permafrost fires before your knockup lands.
Pooled Emerald+ win rates from Sion's side, sampled July 2026.
The full Sion 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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Nobody on paper — a 49.82% win rate over 1,140 games makes this a coin flip decided by play, not champion select.
Yes — Sion vs Sejuani is a genuine skill matchup: 49.82% win rate, and the favour swings window to window rather than being set at champion select.
No hard counter either way — the Sion vs Sejuani win rate is 49.82%, an even lane decided by execution.
Sion takes Grasp of the Undying on the Resolve tree with Demolish, Second Wind and Overgrowth, and Precision secondary (Triumph and Legend: Haste) vs Sejuani.
Start Doran's Shield + Health Potion and back for Core component + boots (≈1300g). Build Heartsteel (W + passive love HP) first, then Warmog's Armor / Thornmail, with Plated Steelcaps.
Playing the other side? Sejuani vs Sion guide →
All Sion top lane matchups →
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