Karthus - League of Legends Champion
Win Rate
48.4%
Pick Rate
0.7%
Ban Rate
0.5%

Karthusvs Viktor

FMage
Patch26.17
Games663
LaneAll Lanes
TierAll Tiers
Last UpdatedSep 7, 2026 UTC
MethodologyData Methodology

Karthus vs Viktor is a decisive matchup in LoL patch 26.17. Viktor wins with a 60.0% win rate (+20.0%) over Karthus based on 5 games. Viktor wins the early laning phase while Karthus scales better into the late game. Below you'll find the best Karthus build, runes, laning stats, and strategies for the Karthus vs Viktor matchup.

Karthus Matchup Breakdown

Use the dropdown to select an opponent and see a detailed breakdown of how Karthus performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.

Compare against an opponent
Karthus - 40.0% win rate in this matchup
Karthus
40.0% WR
VS
Viktor vs Karthus matchup - 60.0% win rate
Viktor
60.0% WR

Who Wins the Karthus vs Viktor Matchup?

Viktor wins the Karthus vs Viktor matchup
Winner
Viktor
Matches: 5
40.0%
Win Rate
60.0%
6.5
CS / min
7.2
990
DMG / min
775
13,658
Gold / game
14,597
58
Heal / min
121
395
DMG Mitigated / min
625
0.6
CC / min
1.0
0.0%
Early Game WR
100.0%
50.0%
Late Game WR
50.0%

Karthus vs Viktor Matchup Summary

The Karthus vs Viktor matchup is a decisive matchup in League of Legends ranked play. Based on 5 recent matches analyzed, Viktor wins with a 60.0% win rate compared to Karthus's 40.0%, giving Viktor a 20.0 percentage point advantage. Game phase dynamics play a critical role here: Viktor controls the early laning stage, but Karthus outscales as the game goes longer. The matchup shifts dramatically depending on game length — Viktor needs to press advantages before Karthus reaches their power spikes, while Karthus should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in healing, where Viktor leads by 64 HP healed/min — a difference that heavily influences the outcome of trades and skirmishes. Viktor has a strong advantage in this matchup. Karthus players should play defensively, prioritize safe farming under tower, and look for opportunities created by jungle pressure or Viktor overextending. Avoid prolonged trades and wait for team fights where positioning and coordination matter more. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.

Very small sampleBased on 5 matches. This is far too small a sample to draw conclusions from — treat these numbers as provisional.

Karthus vs Viktor Laning Phase Breakdown

Viktor wins the laning phase against Karthus in League of Legends

Viktor is favored during the laning phase against Karthus, winning 3 out of 4 key stat categories. Viktor holds advantages in farming, gold income and crowd control, making them the stronger laner in this matchup.

Farming
6.5Karthus
7.2Viktor
Viktor edges out Karthus by 0.7 CS per minute — a moderate farming advantage that adds up to roughly 11 CS over a 15-minute laning phase. This translates to earlier component purchases and slightly faster power spikes for Viktor.
Damage
990Karthus
775Viktor
Karthus heavily out-damages Viktor by 214 DMG/min, dominating both short trades and all-in fights. Viktor should avoid extended combat and instead focus on burst trade patterns — short engages followed by immediate disengagement — to avoid letting Karthus's sustained damage advantage take over.
Economy
13,658Karthus
14,597Viktor
Viktor generates a commanding 938 more gold per game than Karthus. This substantial economic advantage means Viktor consistently reaches key item breakpoints earlier, creating a compounding lead that grows throughout the game. Karthus should focus on cost-effective item choices and avoid unnecessary deaths to prevent falling further behind.
Utility
0.6Karthus
1.0Viktor
Viktor provides 0.4 seconds more crowd control per minute than Karthus, offering better gank setup potential and slightly more team fight utility. This CC advantage helps Viktor coordinate with their jungler and control the pace of skirmishes.
Healing
58Karthus
121Viktor
Viktor heals 64 HP/min more than Karthus. It helps Viktor recover between trades, but the gap is not large enough to justify an early anti-heal item.
Durability
395Karthus
625Viktor
Viktor mitigates 231 more damage per minute than Karthus through shields and resistances. Karthus should time trades around Viktor's shields and cooldowns and prioritize penetration or percent-health damage rather than anti-heal.

Best Karthus Build Against Viktor

Not enough matchup-specific build data: only 1 of 1 Karthus games against Viktor carried a complete build, which is too few to recommend an item path from. Use Karthus's standard build instead.

Early Game vs Late Game

Early Game
Viktor
100.0%
+100.0% advantage
Karthus early game win rateKarthus0.0%
Viktor early game win rateViktor100.0%
Late Game
Karthus
50.0%
+0.0% advantage
Karthus late game win rateKarthus50.0%
Viktor late game win rateViktor50.0%

Viktor dominates the early game (first 15 minutes) with a commanding 100.0% win rate — a 100.0 percentage point lead over Karthus. This lopsided early game means Viktor can dictate the pace of the lane from level 1, controlling trades, wave state, and river priority.

Late game (25+ minutes) is equally balanced, with Karthus at 50.0% win rate — only 0.0 points ahead of Viktor. Team fight execution and macro play determine the winner at this stage, not champion matchup advantage.

The power dynamics shift as the game progresses — Viktor has the edge early, but Karthus gradually takes over. However, the margins are slim enough that either champion can win at any stage with the right plays. Focus on taking advantages when you have them rather than waiting for a specific game phase.

Best Karthus Runes Against Viktor

Domination rune tree - Karthus primary runes vs ViktorDomination
Dark Harvest - best Karthus rune vs ViktorCheap Shot - best Karthus rune vs ViktorGrisly Mementos - best Karthus rune vs ViktorUltimate Hunter - best Karthus rune vs Viktor
Sorcery rune tree - Karthus secondary runes vs ViktorSorcery
Axiom Arcanist - best Karthus rune vs ViktorGathering Storm - best Karthus rune vs Viktor
50.0% WR

The Domination and Sorcery rune setup gives Karthus the best tools to compete against Viktor in this difficult matchup, compensating for the statistical disadvantages with optimal rune synergies.


Karthus matchup data for League of Legends patch 26.17. The table below shows Karthus's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Karthus build, runes, laning stats, and early vs late game analysis for that specific matchup.

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Karthus vs Viktor - Frequently Asked Questions

How does Karthus do against Viktor in League of Legends?

Viktor wins the Karthus vs Viktor matchup with a 60.0% win rate compared to Karthus's 40.0%, a 20.0 percentage point difference. This data is based on 5 recent ranked games in patch 26.17.

How does Karthus do against Viktor in the early game?

In the early game, Viktor has the advantage against Karthus with a 100.0% win rate versus 0.0%. Viktor players should look to press their lane advantage through aggressive trades and wave control during the first 15 minutes.

How does Karthus do against Viktor in the late game?

In the late game, Karthus takes over the Karthus vs Viktor matchup with a 50.0% win rate compared to 50.0%. Karthus scales better into team fights and objective contests after 25 minutes.

Who wins the Karthus vs Viktor matchup?

Viktor wins the matchup against Karthus with a 60.0% win rate in League of Legends patch 26.17. The 20.0 percentage point advantage means Viktor is significantly favored in this lane matchup based on 5 games analyzed.

What is the best Karthus build against Viktor?

There is not enough matchup-specific build data to recommend an item path for Karthus against Viktor yet. Use Karthus's standard build for the current patch and adapt situational items to Viktor.

What are the best Karthus runes against Viktor?

The best Karthus runes against Viktor use the Domination primary tree with Sorcery secondary. This rune setup achieves a 50.0% win rate in the Karthus vs Viktor matchup. See the full rune breakdown in the matchup comparison above.

Does Karthus counter Viktor?

No, Karthus struggles against Viktor with only a 40.0% win rate. Viktor has the advantage in this matchup. Karthus players should focus on safe farming and avoiding extended trades to minimize Viktor's lead.

How do I play Karthus against Viktor?

When playing Karthus against Viktor, play cautiously and avoid Viktor's power spikes. Focus on safe farming — you outscale Viktor in the late game. Use the matchup-specific build and runes above to optimize your chances.