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Matchup

Rell
Rell
0%
100%

vs

50.0%
Kayn
Kayn
91%
9%
Heavy AD damageHigh sustainDive threatHigh burst

Build vs Kayn

Build adapted to this matchup

Starting items

Health Potion
x2

Core build

Locket of the Iron Solari
1HP
Thornmail
2vs Hybride
Zeke's Convergence
3Tank

Standard

Boots of Swiftness
4vs Slow
Celestial Opposition
5HP

Summoner spells

414100%

Anti AD

Plated Steelcaps
4vs AD
Knight's Vow
5vs AD

Anti AP

Mercury's Treads
4vs CC
Bandlepipes
5vs Hybride

Other options

Celestial Opposition
HP
Protoplasm Harness
Survival
100.0% WR1 games
ResolveResolve
AftershockAftershock
Shield BashShield Bash
Bone PlatingBone Plating
UnflinchingUnflinching
PrecisionPrecision
Legend: HasteLegend: Haste
TriumphTriumph
Ability HasteHealth ScalingHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
RellRell
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