Matchup

Heavy AD damageHigh sustainDive threatHigh burst

Build vs Kayn

Build adapted to this matchup

Starting items

Health Potion
x2

Core build

Hextech Rocketbelt
1Mage tank
Zhonya's Hourglass
2vs AD
Frozen Heart
3vs AD

Standard

Ionian Boots of Lucidity
4CDR
Zaz'Zak's Realmspike
5HP

Anti CC

Mercury's Treads
4vs CC

Anti Tank

Stormsurge
5vs Tank

DPS

Rabadon's Deathcap
Mage
Malignance
Mage
Lich Bane
Mage

Other options

Zaz'Zak's Realmspike
HP
Morellonomicon
vs Heal

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
NeekoNeeko
KaynKayn
Passive
Favorable
Favorable

Kayn's abilities

Passive, spells and ultimate

The Darkin Scythe (P)

Kayn wields an ancient weapon and fights Rhaast, the darkin within it, for control. Either the Darkin will triumph, or Kayn will master Rhaast and become the Shadow Assassin.Darkin: Heal for a percentage of spell damage dealt to champions.Shadow Assassin: For the first few seconds in combat with enemy champions, deal bonus damage.

Cooldowns

Cooldowns by spell rank

LevelQWER
37s13s21s
66s13s21s2m
95s12s21s2m
115s11s21s1m40
165s9s17s1m20
185s9s13s1m20

Playing against Kayn

How to counter and exploit weaknesses

1

Ward beyond walls: Kayn passes through walls with his E, classic river wards aren't enough.

2

Blue form (assassin) is squishy: a CC kills him quickly. Red form (Rhaast) has sustain: Grievous Wounds is mandatory.

3

His R makes him untouchable — don't waste abilities when he's inside an ally.

4

Before his transformation, Kayn is relatively weak — invade his jungle early to delay his transformation.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026