How to win lane as Heimerdinger against Sejuani · 47.37% win rate (133 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Bully her early — nest up and stun her Permafrost dive.
Track: Sejuani's E — Permafrost. Her stun after Frost stacks. Don't get stacked + stunned.
Read from Heimerdinger's seat: which stage windows this plan plays for against Sejuani.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Sejuani | Frost Armor gives her free armour, MR and immunity to slows, so one turret and its slowing beam barely register while she walks you down. |
| Level 2 | Sejuani | Winter's Wrath swings twice on a 9s cooldown and stacks Frost, so every walk-up to last-hit feeds the Permafrost stun. |
| Level 3 | Even / skill | A second turret and your 11s grenade let you contest, but a Frost-stacked Permafrost still punishes a greedy step — neither side runs the early wave away. |
| Levels 4-5 | Heimerdinger | Three banked charges plus the CH-2 grenade's direct-hit stun make her walk-ups suicidal for the 18s her dash is down. |
| Level 6 | Heimerdinger | UPGRADE!!! on a wider grenade or a super-turret out-zones Glacial Prison — it is 120s, so punish the moment she throws it. |
| First item | Sejuani | She soaks beams with tank items, and Arctic Assault stops on champions, not turrets — the nest never blocks her dash in. |
| Two+ items | Sejuani | Winter's Wrath plus a Sunfire frontline shreds your low HP while Glacial Prison into Permafrost chains the immobile yordle — she out-scales the nest. |
Sejuani opens with Frost Armor — free armour, MR and immunity to slows out of combat — so your turret's slowing beam does nothing until she has taken damage. At Level 1 you have one turret and no grenade, so concede that contact window and last-hit from max range. By Level 2-3 a second turret lets you contest, but respect the chain: Winter's Wrath swings twice on 9s and stacks Frost, and Permafrost stuns you out of the nest once those stacks fill. Bait her step-up with a turret before you ever spend the 11s grenade.
Pooled Emerald+ win rates from Heimerdinger's side, sampled July 2026.
The full Heimerdinger 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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Sejuani, slightly — Heimerdinger wins 47.37% of 133 games; winnable with the right plan.
Mostly — Sejuani has a small statistical edge (52.63% win rate), but execution decides this lane far more than the pick does.
No — if anything Sejuani has the slight edge (Heimerdinger wins 47.37%), though it stays close.
Heimerdinger takes Arcane Comet on the Sorcery tree with Manaflow Band, Transcendence and Scorch, and Inspiration secondary (Biscuit Delivery and Cosmic Insight) vs Sejuani.
Start Doran's Ring + 2 Health Potions and back for Core component + boots (≈1300g). Build Liandry's Torment (turret burn) first, then Rylai's Crystal Scepter, with Sorcerer's Shoes.
Playing the other side? Sejuani vs Heimerdinger guide →
All Heimerdinger top lane matchups →
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