Kayn

A

The Shadow Reaper · Skirmisher

Patch

View builds

Summoner's Rift ARAM Arena Nexus Blitz URF One for All Swiftplay Ultimate Spellbook

Abilities

PassiveThe Darkin Scythe

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.

QReaping Slash7/6.5/6/5.5/5s40

Kayn dashes, then slashes. Both deal damage.

WBlade's Reach13/12/11/10/9s40/45/50/55/60

Kayn damages and slows targets in a line.

EShadow Step21/19/17/15/13s90

Kayn can walk through terrain.

RUmbral Trespass120/100/80s100

Kayn hides in an enemy's body, dealing massive damage when he bursts out.

Base stats

Health655 +103/lvl
Mana410 +50/lvl
Attack Damage68 +3.3/lvl
Attack Speed0.669 +2.7/lvl
Armor38 +4.5/lvl
Magic Resist32 +2.05/lvl
Base Health Regen8 +0.75/lvl
Base Mana Regen11.5 +0.95/lvl
Move Speed340
Range175

Melee · Resource: Mana

Patch history

26.3· Feb 4, 2026Buffed

Reaping Slash
Base damage increased to 75 to 195 from 75 to 175.Buff

26.1· Jan 8, 2026Buffed

Umbral Trespass
Bug Fix: As the Darkin Slayer variant, no longer fails to grant the heal when the target dies at specific stages of the ability.Buff
Bug Fix: As the Darkin Slayer variant, tooltip is no longer missing the base damage scaling per rank in the level-up grid.

25.24· Dec 3, 2025Nerfed

The Darkin Scythe
Shadow Assassin bonus damage reduced to 20% to 40% from 25% to 45%.Nerf

25.19· Sep 24, 2025Nerfed

Reaping Slash
Bug Fix: Dash no longer completes faster than intended.Nerf

25.17· Aug 27, 2025Buffed

Reaping Slash
Mana cost reduced to 40 from 50.Buff
Blade's Reach
Mana cost reduced to 40 to 60 from 60 to 80.Buff

35 older patches

25.10· May 14, 2025Nerfed

Stats
Health growth reduced to 103 from 109.Nerf

25.4

Umbral Trespass
Bug Fix: No longer still applies its exit effect to the target if his False Life triggers during it.

14.7

Reaping Slash
Bonus AD ratio per hit increased to 85% bonus AD from 80%.

Total bonus AD ratio increased to

170% bonus AD

from

160%

.

14.6

Reaping Slash
Darkin Slayer health ratio increased to 6% of target's maximum health from 5%.
New Effect: Item actives are now locked out while casting.
Umbral Trespass
Bonus AD ratio reduced to 150% bonus AD from 175%.

14.5

The Darkin Scythe
New Effect: Darkin Slayer healing now scales with 0.5% per 100 bonus health.
Umbral Trespass
Darkin Slayer heal increased to 75% of damage amount from 65%.
Base heal increased to 11.25% of the target's maximum health from 9.75%
Heal bonus AD ratio increased to 7.5% per 100 bonus AD from 6.5%.

14.2

The Darkin Scythe
Removed: Damage instances dealt by Summon Aery no longer spawn orbs for transformation progress.
Umbral Trespass
Bug Fix: Darkin Slayer version's heal is now granted automatically if the unit dies during the channel.
Unknown Patch - Estimated V13.23
General
Transforming into Shadow Assassin or Rhaast no longer causes the central portion of the in-game UI to use their respective base portraits for all skins.

13.18

The Darkin Scythe
Darkin Slayer healing changed to 25% of damage dealt at all levels from 20% to 30%.
Umbral Trespass
Darkin Slayer damage bonus AD ratio reduced to 10% per bonus AD from 13%.
Darkin Slayer heal bonus AD ratio reduced to 6.5% per 100 bonus AD from 8.45%.

13.17

The Darkin Scythe
New Effect: Now fully restores his health and mana upon transforming. Does not apply in ARAM.
Blade's Reach
Bonus AD ratio reduced to 110% bonus AD from 130%.

13.8

Shadow Step
Shadow Assassin cooldown increased to 10 seconds from 8.
Shadow Assassin bonus movement speed reduced to 70% from 80%.

13.3

The Darkin Scythe
Shadow Assassin bonus damage increased to 15% to 45% from 13% to 40%.
Reaping Slash
Bonus AD ratio increased to 80% bonus AD from 65%.
Total bonus AD ratio increased to 160% bonus AD from 130%.

12.23

The Darkin Scythe
Shadow Assassin bonus damage increased to 13% to 40% from 9.3% to 31.4%.
The previous values were intended to be 8% to 30.1%, but were greater in effect.
Shadow Step
Bonus AD ratio increased to 45% bonus AD from 35% bonus AD.

12.18

Reaping Slash
Darkin Slayer bonus AD ratio reduced to 3.5% per 100 bonus AD from 5%.

12.14

Stats
Health growth increased to 109 from 99.
The Darkin Scythe
Darkin Slayer heal reduced to 20% to 30% from 25% to 35%.

12.13

The Darkin Scythe
Bug Fix: Damage instances dealt by First Strike no longer spawn orbs for transformation progress.

12.11

Reaping Slash
Darkin Slayer bonus AD ratio reduced to 5% per 100 bonus AD from 5.5%.

12.10

Stats
Base health increased to 655 from 585.
Health growth increased to 99 from 85.
Armor growth increased to 4.5 from 3.3.
Magic resistance growth increased to 2.05 from 1.25.
The Darkin Scythe
Darkin Slayer heal reduced to 25% to 35% from 30% to 40%.
Shadow Step
Base heal reduced to 90 to 130 from 100 to 160.
Bonus AD ratio reduced to 35% bonus AD from 40%.
Umbral Trespass
Darkin Slayer base heal reduced to 9.75% of the target's maximum health from 10.5%.
Darkin Slayer heal bonus AD ratio reduced to 8.45% per 100 bonus AD from 9.1%.

11.23

The Darkin Scythe
Bug Fix: Now properly displays its transformation status in the allied chat when the portrait is pinged.

11.22

Reaping Slash
Darkin Slayer bonus AD ratio increased to 5.5% per 100 bonus AD from 4%.
Umbral Trespass
Darkin Slayer base damage increased to 15% of target's maximum health from 10%.
Darkin Slayer base heal increased to 10.5% of target's maximum health from 7%.

11.20

General
Adjusted splash artwork for Nightbringer Kayn and Prestige Nightbringer Kayn.
Blade's Reach
Bug Fix: Fixed a bug where Shadow Assassin would only receive half of local tower gold if his living shadow was active and in range.

11.17

The Darkin Scythe
Shadow Assassin bonus damage reduced to 8% to 30% from 12% to 44%.

11.15

The Darkin Scythe
Bug Fix: Global transformation SFX now plays for both allies and enemies.
Bug Fix: Transformation SFX is now stereo for the local player.
Blade's Reach
Bug Fix: On-hit SFX is now form-specific.
Shadow Step
Bug Fix: Fixed a bug where the SFX made a popping noise when it looped.
Original Kayn
Bug Fix: Recall SFX is now form-specific.
Odyssey Kayn
Bug Fix: Dance music is now form specific.

11.13

Blade's Reach
New Effect: VFX is now revealed when cast within terrain towards enemy champions.
Umbral Trespass
Bug Fix: Now correctly cancels early if stunned during the channel.

11.9

Reaping Slash
Darkin Slayer AD ratio increased to 65% AD from 55% AD.

11.5

General
Undocumented: Kayn's non-classic skins' base-form portraits will no longer appear on the scoreboard for all players.

11.1

Stats
Base magic resistance reduced to 32 from 32.1.

10.25

Stats
Base armor increased to 38 from 35.
Reaping Slash
Base damage increased to 75 to 155 from 65 to 145.
Stats
Base armor reduced to 35 from 38.
Reaping Slash
Cooldown increased to 7 to 5 seconds from 6 to 4.
Base damage reduced to 65 to 145 from 75 to 155.

10.20

Odyssey Kayn
Bug Fix: Fixed a bug where he would expand and shrink when an enemy player highlighted him.

10.12

Blade's Reach
Bug Fix: No longer able to cast globally to all enemies on the map.

10.10

The Darkin Scythe
Darkin Slayer heal reduced to 30% to 40% from 34.5% to 43%.

10.9

Reaping Slash
Cooldown reduced to 6 to 4 seconds from 7 to 5.
New Effect: Bonus damage now applies to minions.
Undocumented: Rhaast capped damage no longer also considers the bonus damage.
Blade's Reach
Slow increased to 90% from 70%.

10.6

Blade's Reach
Bug Fix: Can no longer self-cast to damage units globally.
General
Recommended items updated.
The Darkin Scythe
Orb gain rate changed to 3;3+(10-3)/8*(x-1) for 6; then + (10-3)/8*x*1.15 from 3;3 to 10.
Blade's Reach
Undocumented: If self-casted, Blade's Reach now hits all units globally, instead of only up to 4500 units away.

10.5

The Darkin Scythe
Orb gain rate changed to 3;3 to 10 from 3;6;10.
Blade's Reach
Slow strength increased to 70% from 60%.

10.3

The Darkin Scythe
Bug Fix: Fixed a bug where he could select neither form if he died damaging both a ranged and a melee champion when the orb count for both forms were within 8% of each other.

9.21

Reaping Slash
Base damage increased to 75 to 155 from 60 to 140.
Darkin Slayer AD ratio increased to 55% AD from 50% AD.
Bonus damage against monsters reduced to 40 from 55.
Blade's Reach A
Bug Fix: Having the living shadow from Shadow Assassin Blade's Reach stand on the Eye of the Herald no longer has that non-champion entity pick it up.

9.15

Umbral Trespass
Bug Fix: Now properly goes on cooldown if the target dies while he has infested them.