Kai'Savs Swain
Kai'Sa vs Swain is a moderate matchup in LoL patch 26.19. Swain wins with a 51.5% win rate (+3.0%) over Kai'Sa based on 33 games. Kai'Sa wins the early laning phase while Swain scales better into the late game. Below you'll find the best Kai'Sa build, runes, laning stats, and strategies for the Kai'Sa vs Swain matchup.
Kai'Sa Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Kai'Sa 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 Kai'Sa vs Swain?
Kai'Sa wins 46.3% of these games. With this many games the true rate is most likely between 33.7% and 59.4% (95% range).
- Expected
- 47.4% From both champions' overall Bot win rates
- Matchup effect
- −1.1 pts Observed minus expected
- Sample
- 54 games Lane: Bot
- vs patch 26.18
- −11.5 pts Within normal patch-to-patch noise
Lane: Bot · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Swain, but the sample is too limited for a strong conclusion: Kai'Sa wins 46.3% of 54 games (95% range 33.7–59.4%).
- Both champions' overall Bot win rates predict 47.4% for Kai'Sa; 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 222, within the margin of error (53 games).
- Kai'Sa players pick Mercury's Treads far more often against Swain: 0.5% of their other Bot games, 3.7% 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 Kai'Sa and Swain 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 Kai'Sa'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.
Kai'Sa vs Swain Laning Stats
At 15 minutes
Whole-game averages
Kai'Sa vs Swain Win Rate by Game Length
Kai'Sa's win rate against Swain 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: Kai'Sa's results against Swain in short and long games are within the margin of error of each other.
Kai'Sa vs Swain 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)EvenKai'Sa gold at 15: −222
- First itemSwainKai'Sa: 12.3 min · Swain: 10.8 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Kai'Sa Changes Against Swain
Choices Kai'Sa players make noticeably more or less often in this matchup than in their other Bot games.
Mercury's TreadsBootsUsually0.5%vs Swain3.7%+3.2 pts
Best Kai'Sa Build vs Swain
Usual Kai'Sa build (Bot)
82.6% win rate · 23 games
Against Swain
Not enough matchup-specific build data: only 10 of 37 Kai'Sa games against Swain carried a complete build, which is too few to recommend an item path from. Use Kai'Sa's standard build instead.
- Kai'Sa usually completes Kraken Slayer first, at 12.3 min (median of 37 games).
- Swain usually completes Malignance first, at 10.8 min (median of 20 games).
- Skill priority: Q > E > W — 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 Kai'Sa Runes vs Swain
Usual Kai'Sa runes (Bot)
Lethal Tempo
70.4% win rate · 27 games
Against Swain
Lethal Tempo
30.0% win rate · 20 games
Plan your Kai'Sa 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
Kai'Sa matchup data for League of Legends patch 26.19. The table below shows Kai'Sa'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 Kai'Sa build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Kai'Sa Matchups
Hardest for Kai'Sa
Easiest for Kai'Sa
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.
Kai'Sa vs Swain FAQ - Patch 26.19
Who wins Kai'Sa vs Swain?
Current data slightly favors Swain, but the sample is too limited for a strong conclusion: Kai'Sa wins 46.3% of 54 games (95% range 33.7–59.4%).
What is Kai'Sa's win rate against Swain?
Kai'Sa wins 46.3% of 54 Bot games against Swain on patch 26.19 (95% range 33.7–59.4%). Based on both champions' overall Bot win rates, 47.4% would be expected.
Does Kai'Sa counter Swain?
Not clearly. Kai'Sa wins 46.3% of 54 games against Swain, and the 95% range (33.7–59.4%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Kai'Sa or Swain?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 222, within the margin of error (53 games).
Does Kai'Sa outscale Swain?
There are too few games of each length to tell yet.
When is Swain strongest against Kai'Sa?
Swain is measurably ahead in: First item.
What should Kai'Sa build against Swain?
There are not enough games for a matchup-specific core, so use Kai'Sa's usual Bot core: Runaan's Hurricane, Lord Dominik's Regards, Yun Tal Wildarrows. The biggest change against Swain: Mercury's Treads (0.5% usually, 3.7% here).
What runes should Kai'Sa use against Swain?
Lethal Tempo with Precision and Inspiration — 30.0% over 20 games against Swain.