How to win lane as Karthus against Sivir · 47.08% win rate (1,612 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Her shield eats the Requiem — yes, the whole global; fire it only after her E shows or bill someone else's lane.
Track: Sivir's E — Spell Shield (24–18s cooldown). Eats your key spell and refunds her mana — bait it with a cheap cast first.
Read from Karthus's seat: which stage windows this plan plays for against Sivir.
This is Karthus's own plan; across 1,612 pooled games the lane is leaning Sivir.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Sivir | Sivir's rank-1 Boomerang and Ricochet shove the wave and let her poke you first at level 1. |
| Level 2 | Sivir | At level 2 her Spell Shield still trivializes your single Q and she controls the wave. |
| Level 3 | Sivir | Through level 3 her push tempo and shield keep her the safer, more threatening laner. |
| Levels 4-5 | Karthus | By levels 4-5 your ranked-up Q out-ranges Boomerang and you win the poke war. |
| Level 6 | Karthus | Your level 6 Requiem executes low Sivir backs that her Spell Shield cannot prevent. |
| First item | Karthus | A completed first item makes your Q+E burst out-trade her raw auto damage. |
| Two+ items | Karthus | In late teamfights your death passive and E melt her grouped comp faster than she can peel. |
Levels 1-2 Sivir is ahead: her Boomerang Blade plus Ricochet push the wave into you and let her poke on the shove while you have only a rank-1 Q, and her Spell Shield eats your first Lay Waste for free. Respect the early shove, farm safely, and don't waste Q into her shield window. Her shield eats your first cast, so send one at her deliberately and keep the real rotation for two seconds later. Shove with Lay Waste and her mana runs out faster than yours does. Keep the wall for the moment she pushes past her own minions rather than using it on the wave.
Pooled Emerald+ win rates from Karthus's side, sampled July 2026.
The full Karthus vs Sivir 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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Sivir, slightly — Karthus wins 47.08% of 1,612 games; winnable with the right plan.
Mostly — Sivir has a small statistical edge (52.92% win rate), but execution decides this lane far more than the pick does.
No — if anything Sivir has the slight edge (Karthus wins 47.08%), though it stays close.
Karthus takes Dark Harvest on the Domination tree with Cheap Shot, Grisly Mementos and Ultimate Hunter, and Sorcery secondary (Manaflow Band and Transcendence) vs Sivir.
Start Doran's Ring + 2 Health Potions and back for Lost Chapter (≈1300g). Build Liandry's / Blackfire first, then Rabadon's path, with Plated Steelcaps / Sorcerer's.
Playing the other side? Sivir vs Karthus guide →
All Karthus bot lane matchups →
More Karthus bot lane matchups: vs Samira · vs Senna · vs Seraphine · vs Smolder · vs Swain · vs Tristana