- Win Rate
- 49.2%
- Pick Rate
- 6.3%
- Ban Rate
- 12.1%
Sylas vs Karthus
- Patch
- 26.19
- Games
- 12,547
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 7, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Sylas vs Karthus is a decisive matchup in LoL patch 26.19. Sylas wins with a 52.6% win rate (+5.3%) over Karthus based on 19 games. Sylas wins the early laning phase while Karthus scales better into the late game. Below you'll find the best Sylas build, runes, laning stats, and strategies for the Sylas vs Karthus matchup.
Sylas Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sylas 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.
Who wins Sylas vs Karthus?
Sylas wins 55.9% of these games. With this many games the true rate is most likely between 39.5% and 71.1% (95% range).
- Expected
- 50.6% From both champions' overall Jungle win rates
- Matchup effect
- +5.3 pts Observed minus expected
- Sample
- 34 games Lane: Jungle
- vs patch 26.18
- — Not enough games on both patches
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
They also met in another lane (Mid): 6 games, Sylas won 16.7%.
Key takeaways
- Current data slightly favors Sylas, but the sample is too limited for a strong conclusion: Sylas wins 55.9% of 34 games (95% range 39.5–71.1%).
- Both champions' overall Jungle win rates predict 50.6% for Sylas; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Neither side reliably wins the lane: the average gold difference at 15 minutes is 4, within the margin of error (34 games).
- Sylas players pick Axiom Arcanist far more often against Karthus: 0.7% of their other Jungle games, 8.8% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Sylas and Karthus played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Sylas's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Sylas vs Karthus Laning Stats
At 15 minutes
Whole-game averages
Sylas vs Karthus Win Rate by Game Length
Sylas's win rate against Karthus by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Sylas's results against Karthus in short and long games are within the margin of error of each other.
Sylas vs Karthus Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)EvenSylas gold at 15: −4
- First itemEvenSylas: 0.2 min · Karthus: 0.1 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sylas Changes Against Karthus
Choices Sylas players make noticeably more or less often in this matchup than in their other Jungle games.
Axiom ArcanistRuneUsually0.7%vs Karthus8.8%+8.2 pts
Adaptive Force (offense)Stat shardUsually95.6%vs Karthus88.2%−7.3 pts56.7% WR here- Q > W > Ethe Q > W > E skill orderSkill priorityUsually4.5%vs Karthus11.8%+7.3 pts
ElectrocuteKeystoneUsually2.1%vs Karthus8.8%+6.7 pts
Attack Speed (offense)Stat shardUsually2.8%vs Karthus8.8%+6.0 pts
Kaenic RookernItemUsuallyunder 0.5%vs Karthus5.9%+5.9 pts
RevitalizeRuneUsually0.6%vs Karthus5.9%+5.2 pts
Gustwalker Hatchling + Health Potion + Oracle LensStarting itemsUsually1.1%vs Karthus5.9%+4.8 pts
Best Sylas Build vs Karthus
Usual Sylas build (Jungle)
78.2% win rate · 55 games
Against Karthus
Not enough matchup-specific build data: only 10 of 26 Sylas games against Karthus carried a complete build, which is too few to recommend an item path from. Use Sylas's standard build instead.
- Sylas usually completes Scorchclaw Pup first, at 0.2 min (median of 22 games).
- Karthus usually completes Scorchclaw Pup first, at 0.1 min (median of 29 games).
- Skill priority: W > E > Q — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Sylas Runes vs Karthus
Usual Sylas runes (Jungle)
Conqueror
65.6% win rate · 32 games
Against Karthus
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Sylas draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Sylas matchup data for League of Legends patch 26.19. The table below shows Sylas'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 Sylas build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sylas Matchups
Hardest for Sylas
Easiest for Sylas
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Sylas vs Karthus FAQ - Patch 26.19
Who wins Sylas vs Karthus?
Current data slightly favors Sylas, but the sample is too limited for a strong conclusion: Sylas wins 55.9% of 34 games (95% range 39.5–71.1%).
What is Sylas's win rate against Karthus?
Sylas wins 55.9% of 34 Jungle games against Karthus on patch 26.19 (95% range 39.5–71.1%). Based on both champions' overall Jungle win rates, 50.6% would be expected.
Does Sylas counter Karthus?
Not clearly. Sylas wins 55.9% of 34 games against Karthus, and the 95% range (39.5–71.1%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Sylas or Karthus?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 4, within the margin of error (34 games).
Does Sylas outscale Karthus?
There are too few games of each length to tell yet.
When is Karthus strongest against Sylas?
On current data there is no stage of the game where Karthus is ahead of Sylas beyond the margin of error.
What should Sylas build against Karthus?
There are not enough games for a matchup-specific core, so use Sylas's usual Jungle core: Riftmaker, Hextech Rocketbelt, Mejai's Soulstealer. The biggest change against Karthus: Kaenic Rookern (under 0.5% usually, 5.9% here).
What runes should Sylas use against Karthus?
Use Sylas's usual Conqueror page (Precision + Inspiration); there are too few games for a matchup-specific page. The biggest change against Karthus: Axiom Arcanist (0.7% usually, 8.8% here).