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Void · Origins · Advanced

Kai'Sa

Daughter of the Void · Reactive spell tempo

Fury domainFury
Mind domainMind

Kai'Sa turns one unreactable power into live spell windows, letting Fury/Mind lists fight after the opponent thinks resources are spent.

Live data · our tournament results, last 14 days

Where Kai'Sa Stands Right Now

Tier

B

Tempo

Meta share

1.8%

100 tracked decks

Top 8s

3

across 16 events

Match record

53.9%

117W – 100L

CN / West share

2.9% / 1.3%

2 / 1 top 8s

Proven at regionals. The deck to beat in Origins — the standard every other deck was tuned against.

The engine

What Kai'Sa Rewards

Daughter of the Void · printed ability

“: [Reaction] — [Add] 1 Power. Use only to play spells. (Abilities that add resources can't be reacted to.)”

Kai'Sa rewards resource timing; the Legend ability changes how confidently you can pay for your strongest turns.

How it plays

The Game Plan

Treat Kai'Sa as a spell-funding engine, not a generic pressure legend. Her Reaction adds power that can only pay for spells, so the deck wants cheap interaction, combat tricks, and removal that can be held for Showdowns or opponent turns.

Strengths

  • Unreactable spell resource
  • Strong surprise Showdown math
  • Rewards tight spell sequencing

Watch Outs

  • Spell-only power cannot play units
  • Exhausting Kai'Sa limits repeat use
  • Needs enough spells to justify the engine

Turn by Turn

  1. 1Early: develop a threat while preserving cheap spells so Kai'Sa's spell-only power has a real target.
  2. 2Midgame: bait blocks, then use the Reaction power for removal or combat tricks after normal resources look exhausted.
  3. 3Late: chain card selection and high-impact spells into one battlefield swing instead of spending Kai'Sa on low-value tricks.

New to this Legend? Pick Kai'Sa if you like passing with hidden pressure and winning fights because your spell resource was not visible in the normal rune count.

Know the field

Key Matchups

How Kai'Sa lines up against the decks that matter, based on results from our tournament database.

Tough

vs The current top tier

The top meta decks are slightly unfavorable across the board — recent qualifiers have passed without a Kai'Sa cracking the top tables.

Tough

vs Dr. Mundo boards

Once Dr. Mundo, Expert gets big enough, her removal suite just can't deal with him.

Proven lists · from our tournament database

What Winning Kai'Sa Looks Like

The full list below comes straight from a recent top-performing event run, runes and battlefields included. Use it as the reference build, then adjust for your collection.

文科大师在直播桌主牌局不慎把十八张中唯一的鞋子倒放被全球科黑网暴

S3 Tianjin Regional Open · 2026-06-07 · 56 cards

Legend (1)

  • Kai'sa, Daughter of the Void1

Units (18)

  • Lecturing Yordle3
  • Plundering Poro3
  • Thousand-Tailed Watcher3
  • Watchful Sentry3
  • Ferrous Forerunner2
  • Noxus Hopeful2
  • Kai'Sa, Survivor1
  • Ravenbloom Student1

Spells (21)

  • Falling Star3
  • Stupefy3
  • Time Warp3
  • Bellows Breath2
  • Hextech Ray2
  • Singularity2
  • Get Excited!1
  • Progress Day1
  • Retreat1
  • Rocket Barrage1
  • Smite1
  • Void Seeker1

Gear (1)

  • Long Sword1

Runes (12)

  • Fury Rune7
  • Mind Rune5

Battlefields (3)

  • Frozen Fortress1
  • Startipped Peak1
  • Void Gate1

Also putting up results: FSW.蒙牛大勇者🦥️ (S3 Tianjin Regional Open, 2026-06-07) and Tstаr.79 (S3 Tianjin Regional Open, 2026-06-07).

The Cards Doing the Work

Riftbound Spell: Falling Star. Deal 3 to a unit. Deal 3 to a unit.

Removal & reach · 3x

Falling Star

“Deal 3 to a unit. Deal 3 to a unit.”

Never really left the deck — a staple that can flip whole matchups on its head.

Riftbound Unit: Lecturing Yordle. [Tank] (I must be assigned combat damage first.) When you play me, draw 1.

Card advantage · 3x

Lecturing Yordle

“[Tank] (I must be assigned combat damage first.) When you play me, draw 1.”

Riftbound Unit: Thousand-Tailed Watcher. [Accelerate] (You may pay [1][C] as an additional cost to have me enter ready.) When you play me, give enemy units -3 [S] this turn, to a minimum of 1 [S].

Resource engine · 3x

Thousand-Tailed Watcher

“[Accelerate] (You may pay 1 Energy 1 Mind Power as an additional cost to have me enter ready.) When you play me, give enemy units -3 Might this turn, to a minimum of 1 Might.”

Your first build

How to Start Playing Kai'Sa

Kai'Sa has no preconstructed starter deck, so this is a singles build — start from the proven list above in the deck builder and trim toward the cards you own.