S
October 2026 · Patch 7.3c
Assassin · JUNGLE

Kayn Wild Rift Best Build Guide

Truly branching build: Kayn cannot be reduced to one logic because Shadow Assassin and Rhaast do not solve the same fights or the same timings. The cleaned sheet must own that separation instead of flattening it into text that is too universal.

★ JUNGLE Tier S
DMG
UTIL
TANK
DIFF
Win 51.4% #26 · ↓0pt
Pick 7.2% #9
Ban 4.0% #42

Builds — official CN server data (patch 7.3)

Why this data? →
Berserker's Greaves
Recommended bootsBerserker's Greaves
First Strike
Recommended runes: First StrikeSudden ImpactEyeball Collector

Power vs. the roster

Share of the roster this champion outclasses, at each stage of the game.

Early (lv 1-5)52 %
Mid (lv 6-10)57 %
Late (lv 11-15)32 %
Peaks in the mid game– – roster average
Lv 6 Youmuu's GhostbladeLv 9 Eclipse + Ultimate rank 2Lv 13 Serylda's Grudge + Ultimate rank 3

50% = average for the roster at that point of the game, 90% = among the strongest. The three phases come from the site's editorial tempo grid (early/mid/late, rated across 142 champions); the level-by-level curve adds this build's computed spikes — ultimate, completed items — never by more than ±8 points.

Situational adaptations

Chempunk Chainsword
Chempunk ChainswordAgainst healing (Soraka, Aatrox, lifesteal…)
Death's Dance
Death's DanceAgainst AD burst (assassins, Zed, Rengar…)
Maw of Malmortius
Maw of MalmortiusAgainst AP burst (Syndra, Fizz, Evelynn…)
Serpent's Fang
Serpent's FangAgainst shields (enchanters, Sterak)

Adaptations by opponent

Your hardest matchups in this role, and the item from your situational list that answers each one.

Same advisor in the Draft (the MVP sheet applies it to your real draft) and in Ask Nexus, which explains the choice. On counters pages: the variant to take against each counter-pick.

Skill order & runes — background analysis

Skill leveling order and rune choices explained, from our in-depth kit analysis (patch 7.0e). Ability numbers are from patch 7.3; up-to-date items are in the section above.

Kayn is binary: his build must amplify a clear identity. Any hybrid approach severely reduces impact.

Skill order

Q›W›E
Passive
Passive The Darkin Scythe
Q
Reaping Slash
1368
Cooldown
6 / 6 / 5 / 5 s
Mana cost
50 / 50 / 50 / 50
Base damage
70 / 100 / 130 / 160
Bonus AD ratio
60% / 65% / 70% / 75%
Max damage to monsters
235 / 310 / 385 / 460
Ratios
60/65/70/75% bonus AD · 60/65/70/75% AD
W
Blade's Reach
271012
Cooldown
12 / 11 / 10 / 9 s
Mana cost
50 / 60 / 70 / 80
Base damage
90 / 150 / 210 / 270
Ratios
120% bonus AD
E
Shadow Step
4111415
Mana cost
50 / 50 / 50 / 50
Cooldown
18 / 16 / 14 / 12
Duration
5 / 5.5 / 6 / 6.5
HP
100 / 120 / 140 / 160
Ratios
50% bonus AD
R
Umbral Trespass
5913
Cooldown
80 / 70 / 60 s
Mana cost
100 / 100 / 100
Base damage
200 / 300 / 400
Ratios
165% bonus AD

Tap an ability for its per-rank numbers. Source: official Tencent data (Chinese server), patch 7.3 — may lead or lag the global server by a sub-patch.

Runes

First Strike
First Strike

his wall traversal (E) allows him to engage by surprise to activate First Strike.

Sudden Impact
Sudden Impact

dashes E through walls trigger penetration on emergence.

Hubris
Hubris

Both forms convert kills — each gank stacks adaptive force, accelerating your transformation into a threat.

Eyeball Collector
Eyeball Collector

Early ganks feed both your orb and your AD — double reason to hunt takedowns.

Situational Runes

vs Tanks
Coup De Grace Coup De Grace
›
Giant Slayer Giant Slayer
vs Tanks
Coup De Grace Coup De Grace
›
Giant Slayer Giant Slayer