Kai'Sa
Hardest matchups for Kai'Sa in Bot (Emerald, patch 16.20): 
Zed, 
Heimerdinger, 
Vel'Koz. Easiest: 
Ezreal, 
Mel, 
Twisted Fate.
Try it in a draftCountersPower curvesIn the tier listWho wins into Kai'SaOn the pro tier list
Kai'Sa on patch 16.22
- Bot49.5%#42 of 51B63,864 games
- Mid44.5%#85 of 91D708 games
- steady since 16.21
Kai'Sa’s main role on patch 16.22 is Bot: a 49.5% win rate across 63,864 Emerald games, #42 of 51 Bot champions on the tier list (grade B), picked in 25.1% of games. Kai'Sa is also played Mid: a 44.5% win rate across 708 games, #85 of 91. Since patch 16.21, Kai'Sa Bot has not moved by more than chance explains: 0.3 points across 380,156 games in 8 ranks.
Emerald games from every region, as of Nov 9, 2026. The tables below load current numbers. Patch 16.22 tier list
Solo queue
Open in the tier listPatch 16.20, the current one
| Lane | Grade | Win rate | Games | Picked | Mains |
|---|---|---|---|---|---|
| Bot97% of its games | B | 49.5%49.5% raw ±0.3 | 131,827 | 18.5%3.4% banned | 50.2%48.0% first time |
| Mid2% of its games | C | 47.8%47.0% raw ±2.0 | 2,300 | 0.3%3.3% banned | 50.5%47.7% first time |
| Top1% of its games | B | 49.3%49.0% raw ±2.4 | 1,720 | 0.2%3.3% banned | 50.6%46.0% first time |
| Jungle0% of its games | too few games | 46.0%39.7% raw ±4.0 | 610 | 0.1%3.4% banned | 49.7%45.3% first time |
| Support0% of its games | too few games | 48.8%39.7% raw ±8.9 | 121 | 0.0%3.4% banned | 50.9%47.2% first time |
Matchups
Every matchupHow to read this
Kai'Sa’s win rate against each champion picked into it in the lane opposite: its hardest matchups, then its easiest. The small number is the matchup’s own effect on Kai'Sa, the part not explained by either champion’s strength.
Hardest for Kai'Sa
Lane leads and team bans
What Kai'Sa’s team bans
Champions a team bans more often when it has Kai'Sa than the other team does in the same games (871,614 games). The other team banned before Kai'Sa was picked, so the gap is the ban spent because Kai'Sa was coming — a sign players see these as counters. Riot does not say which player cast a ban, so this is the team’s choice.
Builds
Every buildHow to read this
How Kai'Sa is built in this lane, most common first, with the items those builds finish and how they win.
- On-hit
50.8%121,888 games - Lethality
49.2%5,804 games - Crit
53.0%4,074 games - AP burst
49.0%926 games - Mana stack
48.7%460 games
Runes and summoner spells
How to read this
How Kai'Sa does with each summoner-spell pair, keystone and minor rune in this lane, at the rank and region above. These are the win rates of the players who made each choice, not the choice’s own effect: a page is recommended only when a real share of players runs it.
141,219 games · patches 16.20, 16.21 · Sep 10 – Oct 21
Flash + Barrier49.5% · 102,480 games
Lethal TempoPrecision + Inspiration · 49.7%
Triumph · Legend: Alacrity · Cut Down · Cash Back · Cosmic InsightShards: Attack Speed · Adaptive Force · Health
Start: Doran's Bow + Health Potion · 50.8%
Key items: Statikk Shiv → Guinsoo's Rageblade · 51.8%
Boots: Gluttonous Greaves · 54.3%Every option, with its numbers
Summoner spells
- Flash + Barrier49.5%102,480 games · 73% pick rate · the usual choiceRecommended
Exhaust + Flash50.2%25,891 games · 18% pick rate · same players: −2.1 pts vs the usual
Cleanse + Flash47.5%10,469 games · 7.4% pick rate · same players: −3.2 pts vs the usualRare: not recommended
Keystones
Press the Attack + Inspiration48.0%3,787 games · 2.7% pick rate · same players: +0.1 pts vs the usualRare: not recommended- Lethal Tempo + Inspiration49.7%130,302 games · 92% pick rate · the usual choiceRecommended
Minor runes with Lethal Tempo
- Triumph51.0%29% take it
Presence of Mind49.1%70% take it
- Legend: Alacrity50.4%11% take it
Legend: Bloodline49.6%89% take it
- Cut Down50.5%38% take it
Coup de Grace49.1%61% take it
- Cash Back50.4%43% take it
- Cosmic Insight50.3%21% take it
Biscuit Delivery49.3%55% take it
Magical Footwear49.3%54% take it
Triple Tonic50.1%26% take it
- Attack Speed49.5%98% take it
- Adaptive Force49.5%100% take it
- Health50.6%33% take it
- Health Scaling48.9%67% take it
These numbers describe, they do not prove. Each rate is Kai'Sa’s record when its player chose that option, pulled toward Kai'Sa’s own rate by 100 games of prior so a small sample cannot look like a discovery. An uncommon page often wins more because experts run it, and they would win on any page, so only a choice taken in at least 10% of games can be recommended, and spells and keystones are ranked by how the SAME players do with them against the usual choice, not by the raw rate; rarer ones are listed with their numbers and labeled. The build line (opening buy, the two key items in the order they are finished, boots or the support upgrade) is advice in the same sense: how Kai'Sa does when built that way.
The learning curve
Champion pool
On a first game Kai'Sa wins 47.7%; in the hands of players with the most mastery on it, 50.7%. That gap ranks it 147 of 173 for how much practice pays. It crosses 50% at about 210K mastery points.
Pro play
On the pro tier list
Kai'Sa in the major leagues and international events this season, across 3,434 games: its record, how often it is picked or banned, whether it is taken blind or saved as a counter, its lane at 15 minutes, and the best pro on it.
| Lane | Win rate | Priority | Blind / counter | Lane @15 | Best pro |
|---|---|---|---|---|---|
| Bot | 50.7%154W 146L | 15%16% in any lane | 77% counter | +62 gold | — |
| Top | 49.8%1W 2L | 0%16% in any lane | 100% counter | +956 gold | — |
| Jungle | 50.2%1W 0L | 0%16% in any lane | 100% counter | +310 gold | — |
How much knowing Kai'Sa pays
Players on their Mastery band win 3.0 points more on Kai'Sa than first-timers do: #147 of 173 champions for how much mastery pays.
At 300k+ mastery points, Kai'Sa players win 50.7%: #160 of 173 champions for where mastery ends up. The curve is still rising there: its fitted ceiling of about 51.8% lies beyond the data and is an estimate, not a measurement.
Kai'SaDots are the six mastery bands, placed at their mastery points. The line is the best-fitting curve that rises and levels off.
This is not a promise about your next game. Players do not reach a mastery band in a random order, and a champion someone loses on tends to get dropped before it reaches the high bands — so the right-hand side of every curve is partly survivors, not only practice.