How to win lane as Karthus against Kog'Maw · 43.71% win rate (421 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
His stream needs range your aura taxes and time your Requiem bills — iso-Q the lane and collect globally.
Track: Kog'Maw's W — Bio-Arcane Barrage (17s cooldown). The range + shred window IS the champion — disengage for its eight seconds, fight the gaps.
Read from Karthus's seat: which stage windows this plan plays for against Kog'Maw.
This is Karthus's own plan; across 421 pooled games the lane is Kog'Maw-favoured.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Karthus | Kog'Maw's short range and no escape let you out-poke him at level 1. |
| Level 2 | Karthus | At level 2 he still can't contest your Lay Waste without taking damage. |
| Level 3 | Karthus | Level 3 your poke and Wall of Pain punish his immobile farming. |
| Levels 4-5 | Karthus | Through levels 4-5 you keep pressuring the escapeless Kog'Maw. |
| Level 6 | Karthus | Level 6 Requiem snipes him from range to deny his scaling, favoring you. |
| First item | Karthus | Your first AP item bursts him before his Bio-Arcane range comes fully online. |
| Two+ items | Karthus | With two items you must kite his shred, but Requiem still snipes him before he ramps. |
Levels 1-2 are yours: Kog'Maw has no mobility and short range, so you out-poke him with Lay Waste and farm freely while he can only last-hit cautiously. Neither of you can leave, so this is a mana race you win by casting only on low minions and never turning Defile on to push. Take the safe CS and force him to farm at his own tower. Keep the wall for his support's step-up; he has no way to reach you alone.
Pooled Emerald+ win rates from Karthus's side, sampled July 2026.
The full Karthus vs Kog'Maw 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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Kog'Maw — Karthus wins only 43.71% of 421 games, so Karthus plays this as the disadvantaged side.
Not really — Kog'Maw holds a real statistical advantage (56.29% win rate), so Karthus is the one working uphill.
No — Kog'Maw counters Karthus (Karthus wins only 43.71% of games). Play it as the disadvantaged side and lean on the windows in the plan.
Karthus takes Dark Harvest on the Domination tree with Cheap Shot, Grisly Mementos and Ultimate Hunter, and Sorcery secondary (Manaflow Band and Transcendence) vs Kog'Maw.
Start Doran's Ring + 2 Health Potions and back for Lost Chapter (≈1300g). Build Liandry's / Blackfire first, then Rabadon's path, with Sorcerer's Shoes.
Playing the other side? Kog'Maw vs Karthus guide →
All Karthus bot lane matchups →
More Karthus bot lane matchups: vs Jinx · vs Kai'Sa · vs Kalista · vs Lucian · vs Miss Fortune · vs Nilah