Marksman

Kai'Sa

Daughter of the Void

Claimed by the Void when she was only a child, Kai'Sa managed to survive through sheer tenacity and strength of will. Her experiences have made her a deadly hunter and, to some, the harbinger of a future they would rather not live to see.Read the full story on Riot's Universe site

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P
Second Skin
Q
Icathian Rain
W
Void Seeker
E
Supercharge
R
Killer Instinct

Kai'Sa

Overview

On patch 16.21, Kai'Sa is rated B tier in the bot lane, winning 49.8% of 16,561 ranked games with a 17.1% pick rate. The most successful build this patch runs Lethal Tempo with Exhaust and Flash and builds Guinsoo's Rageblade, Kraken Slayer, Nashor's Tooth, and Slightly Magical Footwear.

Kai'Sa struggles most against Syndra (37.5%), Xerath (38.5%), and Viktor (40.6%) and does best against Brand (70%), Yone (66.7%), and Lux (60%).

Ranked solo/duo · patch 16.21 · 16,561 games · updated Nov 1, 2026 · How we calculate

49.8%

Win rate

17.1%

Pick rate

16.6K

Games

16.21

Patch

Playing as Kai'Sa

Try to catch enemy carries alone to burst them with Icathian Rain.
Work with your teammates to set up your Ultimate and optimize damage with your passive.
Make sure to buy items that will evolve at least 1 or 2 of your spells.

Playing against Kai'Sa

Kai'Sa is very good at picking off isolated enemies. Stick together against her.
Kai'Sa is very vulnerable to getting outranged by mages and long range carries.
Make sure to place wards in your blind spots so you can see Kai'Sa coming.

Guides

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Matchups

All Kai'Sa matchups

Strong against

Brand70.0%20
Yone66.7%21
Lux60.0%55
Karthus58.3%24
Teemo58.3%24

Weak against

Syndra37.5%48
Xerath38.5%26
Viktor40.6%96
Zeri42.1%197
Nilah42.5%113

Abilities

P
Second Skin
Kai'Sa's basic attacks stack Plasma, dealing increasing bonus magic damage. Allies' immobilizing effects help stack Plasma. Additionally, Kai'Sa's item purchases upgrade her basic spells to have more powerful properties.
Q
Icathian Rain
Kai'Sa shoots a swarm of missiles that seek out nearby targets. Living Weapon: Icathian Rain is upgraded to shoot more missiles.
Cooldown: 10/9/8/7/6Cost: 55Range: 600
W
Void Seeker
Kai'Sa shoots a long range missile, marking enemies with her passive. Living Weapon: Void Seeker is upgraded to apply more passive marks and reduce cooldown on champion hit.
Cooldown: 20/18.5/17/15.5/14Cost: 55/60/65/70/75Range: 3000
E
Supercharge
Kai'Sa briefly increases her Move Speed, then increases her Attack Speed. Living Weapon: Supercharge is upgraded to briefly grant Invisibility.
Cooldown: 16/14.5/13/11.5/10Cost: 30Range: 1
R
Killer Instinct
Kai'Sa dashes near an enemy champion.
Cooldown: 130/100/70Cost: 100Range: 2000/2500/3000