When Is Kai'Sa Strongest?
The mid-game item window is the high point of the curve, and games at this rank average around 28 minutes. Kai'Sa's plan is to chip a target until the plasma detonates, then warp in behind the frontline and delete whoever she marked before the enemy can turn on her.
Kai'Sa Item Build
Kai'Sa is a flexible carry whose whole build decides what she becomes. Stacking her plasma passive shreds targets down, and the item path she picks evolves her spells so she can poke, burst, or dive in and clean up.
Best Kai'Sa Runes
Lethal Tempo is the standard setup, and Kai'Sa flexes it to match whichever build she is running. Her damage leans on stacking plasma and chaining attacks after a dive, so the keystone just amplifies a fight she is already committing to. Fill the tree around the evolve path you plan to hit first. Keep it flexible, since her item build shapes the game more than the rune ever does.
Precision
Primary
Lethal TempoAttacking an enemy champion grants you Attack Speed, up to 6 stacks. At max stacks, deal bonus adaptive damage On-Attack.
66% · 49.0%87% · 49.8%58% · 49.0%
Keystone plus three minors from Precision, two from Inspiration, then three shards — no runebook, no masteries.
Inspiration
Secondary
48% · 49.4%49% · 49.4%
Kai'Sa Skill Order
Icathian Rain gets the level 1 point and stays max priority over Void Seeker. Supercharge is the last one finished, so the Move Speed and Attack Speed buff spends the longest at low rank while the seeking missiles do the scaling.
Kai'Sa Abilities
Worth knowing on Second Skin: allied crowd control also stacks her plasma, so a good engage support speeds up every detonation without her lifting a finger. Void Seeker is the long range setup, a missile that tags targets with those same marks from a screen away.
Kai'Sa Base Stats
Kai'Sa Matchups
Kai'Sa's matchups hinge on landing plasma stacks and following her mark in. She has the mobility to dodge skillshots and reposition, so she survives lanes that punish a stationary carry, but heavy early poke can bully her off the map.

























































