Kai'Sa vs Samira ADC Matchup

Why Samira is favored

Samira dominates this matchup because Blade Whirl(W) destroys both Icathian Rain(Q) missiles and Void Seeker(W), neutralizing Kai'Sa's primary burst damage and Plasma application. Furthermore, Kai'Sa possesses no hard crowd control to interrupt Samira's Inferno Trigger(R) channel, allowing Samira to freely execute full all-in rotations.

Measured in High Elo: Samira wins 2.5pp more often than expected over 2,312 games.

How to play as Kai'Sa

When you need Icathian Rain(Q) or Void Seeker(W) to connect, try to draw out Samira's Blade Whirl(W) first; wait for its brief projectile-blocking window to end before committing those shots. (Unverified: no source confirms this note.)

If you take Exhaust, use it as Samira begins Inferno Trigger(R) to reduce her damage and slow her while you move out of range. (Unverified: no source confirms this note.)

If Samira starts Flair(Q), take a short level-one trade from behind your minions; look for a longer fight when you have support or wave advantage. (Unverified: no source confirms this note.)

Blade Whirl(W) has a long 30-second cooldown at rank 1, creating a substantial vulnerability window where Samira cannot block incoming missiles.

How to play as Samira

Save Blade Whirl(W) specifically for Kai'Sa's Icathian Rain(Q) or Void Seeker(W); deleting her missiles strips away her burst damage while generating two style stacks toward Inferno Trigger(R).

Blade Whirl(W) destroys all incoming enemy projectiles within its radius for 0.75 seconds, completely erasing Kai'Sa's Icathian Rain(Q) missiles, Void Seeker(W), and basic attacks.

Kai'Sa possesses no hard crowd control in her kit, leaving her entirely incapable of interrupting Samira's Inferno Trigger(R) channel without relying on support crowd control.

Sources

These notes come from LoL Wiki and r/SamiraMains, checked against the champions' abilities.