How to win lane as Heimerdinger against Karthus · 43.88% win rate (139 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
A zone war between architectures — his is cooldowns, yours is standing buildings; trade accordingly.
Track: Karthus's R — Requiem (200–160s cooldown). The global execute — recall above the red line and track it from his level 6 on.
Read from Heimerdinger's seat: which stage windows this plan plays for against Karthus.
This is Heimerdinger's own plan; across 139 pooled games the lane is Karthus-favoured.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Heimerdinger | You-favoured L1: your turret out-pokes the immobile Karthus's Lay Waste. |
| Level 2 | Heimerdinger | You-favoured L2: compounding grenade poke denies his safe farm. |
| Level 3 | Heimerdinger | You-favoured L3: the E-Q combo out-trades his ground-targeted Q. |
| Levels 4-5 | Heimerdinger | You-favoured L4-5: turret siege starves his CS before his ult comes online. |
| Level 6 | Karthus | Karthus-favoured L6: global Requiem executes you regardless of your turret cover. |
| First item | Heimerdinger | You-favoured first item: turret siege out-DPSes his poke once you respect the execute threshold. |
| Two+ items | Heimerdinger | You-favoured 2+ items: your turret nest zones his aura and out-sieges his immobility on objectives. |
Heimerdinger wins levels 1-2: Karthus is an immobile mage with only ground-targeted Lay Waste, so your turret and grenade out-poke him and deny the safe farm he wants. His Lay Waste has to hit a moving target, and standing next to a turret gives you a reason to keep moving. Let the turret hold the wave so you never have to enter Defile range. Once his mana is gone the lane is a formality, so build the wall, poke the step-ups, and take the plate.
Pooled Emerald+ win rates from Heimerdinger's side, sampled July 2026.
The full Heimerdinger vs Karthus 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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Karthus — Heimerdinger wins only 43.88% of 139 games, so Heimerdinger plays this as the disadvantaged side.
Not really — Karthus holds a real statistical advantage (56.12% win rate), so Heimerdinger is the one working uphill.
No — Karthus counters Heimerdinger (Heimerdinger wins only 43.88% of games). Play it as the disadvantaged side and lean on the windows in the plan.
Heimerdinger takes Arcane Comet on the Sorcery tree with Manaflow Band, Transcendence and Scorch, and Inspiration secondary (Biscuit Delivery and Cosmic Insight) vs Karthus.
Start Doran's Ring + 2 Health Potions and back for Lost Chapter (≈1300g). Build Blackfire / Liandry's first, then Rylai's, with Mercury's Treads / Sorcerer's.
Playing the other side? Karthus vs Heimerdinger guide →
All Heimerdinger bot lane matchups →
More Heimerdinger bot lane matchups: vs Jinx · vs Kai'Sa · vs Kalista · vs Kog'Maw · vs Lucian · vs Miss Fortune