Sejuanivs Karthus
Sejuani vs Karthus is a decisive matchup in LoL patch 26.19. Sejuani wins with a 61.5% win rate (+23.1%) over Karthus based on 13 games. Sejuani wins the early laning phase while Karthus scales better into the late game. Below you'll find the best Sejuani build, runes, laning stats, and strategies for the Sejuani vs Karthus matchup.
Sejuani Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sejuani 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 Sejuani vs Karthus?
Sejuani wins 47.4% of these games. With this many games the true rate is most likely between 27.3% and 68.3% (95% range).
- Expected
- 52.7% From both champions' overall Jungle win rates
- Matchup effect
- −5.3 pts Observed minus expected
- Sample
- 19 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 25 – Sep 28
Key takeaways
- Only 19 Sejuani vs Karthus games were recorded in the Jungle role on patch 26.19 — too few to say who is favored. Treat the numbers below as provisional.
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 Sejuani 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 Sejuani'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.
Sejuani vs Karthus Laning Stats
Only 18 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Sejuani vs Karthus Win Rate by Game Length
Sejuani'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: Sejuani's results against Karthus in short and long games are within the margin of error of each other.
Sejuani 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)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sejuani Changes Against Karthus
Only 19 games so far — too few to compare what Sejuani players do in this matchup with their usual choices (needs 20).
Best Sejuani Build vs Karthus
Usual Sejuani build (Jungle)
79.3% win rate · 29 games
Against Karthus
Not enough matchup-specific build data: only 0 of 19 Sejuani games against Karthus carried a complete build, which is too few to recommend an item path from. Use Sejuani's standard build instead.
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 Sejuani Runes vs Karthus
Usual Sejuani runes (Jungle)
Aftershock
55.1% win rate · 376 games
Against Karthus
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Sejuani 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
Sejuani matchup data for League of Legends patch 26.19. The table below shows Sejuani'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 Sejuani build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sejuani Matchups
Hardest for Sejuani
Easiest for Sejuani
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.
Sejuani vs Karthus FAQ - Patch 26.19
Who wins Sejuani vs Karthus?
Only 19 Sejuani vs Karthus games were recorded in the Jungle role on patch 26.19 — too few to say who is favored. Treat the numbers below as provisional.
What is Sejuani's win rate against Karthus?
Sejuani wins 47.4% of 19 Jungle games against Karthus on patch 26.19 (95% range 27.3–68.3%). Based on both champions' overall Jungle win rates, 52.7% would be expected.
Does Sejuani counter Karthus?
There are only 19 Sejuani vs Karthus games in this lane on patch 26.19 — too few to answer reliably yet.
Who wins lane, Sejuani or Karthus?
There are not enough games with a 15-minute snapshot yet (18) to say who wins lane.
Does Sejuani outscale Karthus?
There are too few games of each length to tell yet.
When is Karthus strongest against Sejuani?
On current data there is no stage of the game where Karthus is ahead of Sejuani beyond the margin of error.
What should Sejuani build against Karthus?
There are not enough games for a matchup-specific core, so use Sejuani's usual Jungle core: Hollow Radiance, Heartsteel, Thornmail.
What runes should Sejuani use against Karthus?
Use Sejuani's usual Aftershock page (Resolve + Precision); there are too few games for a matchup-specific page.