Champions › Kayn
Kayn Mid Build, Patch 26.20 — Runes, Ability Damage & ARAM Buffs/Nerfs
the Shadow Reaper · AD damageFighterAssassinSkirmisherMid
Every number below is computed from Riot's official game data for patch 26.20 — the Worlds 2026 patch (Data Dragon, with Meraki Analytics ability values and Riot's published ARAM balance), not sampled from match histories. Open the interactive labs to test Kayn against any opponent at any level.
Damage LabLaning matchupBuild LabARAM sheet
Kayn build and runes (Mid, patch 26.20)
Item order
- Infinity Edge
- Berserker's Greaves
- Bloodthirster
- Trinity Force
- Death's Dance
- Lord Dominik's Regards
Start: Doran's Blade, Health Potion
Situational: —
Rune page
Precision · keystone Press the Attack
Absorb Life, Legend: Alacrity, Coup de Grace
Secondary: Cheap Shot, Sixth Sense
Summoners: Flash, Ignite · Skill order: Q > W > E
Kayn is classified AD from its ability scalings; itemization computed from Infinity Edge + current-patch item stats. Win-rate shown is an estimate and does not drive the build.
Kayn base stats by level
| Level | Health | Attack damage | Armor | Magic resist | Attack speed |
|---|---|---|---|---|---|
| Level 1 | 655 | 68.0 | 38.0 | 32.0 | 0.669 |
| Level 6 | 1,062 | 81.0 | 55.8 | 40.1 | 0.740 |
| Level 11 | 1,559 | 97.0 | 77.5 | 50.0 | 0.828 |
| Level 18 | 2,406 | 124.1 | 114.5 | 66.8 | 0.976 |
Growth follows Riot's per-level curve: value = base + growth × (n−1) × (0.7025 + 0.0175 × (n−1)).
Kayn ability damage per rank
Q — Reaping Slash physical
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | 150 | 200 | 250 | 300 | 350 |
| Cooldown (s) | 7.0 | 6.5 | 6.0 | 5.5 | 5.0 |
Scaling: 170/170/170/170/170% bonus AD.
Kayn Q damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 1 | rank 1 | 150.0 | 7.0s |
| Level 3 | rank 2 | 200.0 | 6.5s |
| Level 6 | rank 3 | 250.0 | 6.0s |
| Level 9 | rank 5 | 350.0 | 5.0s |
| Level 11 | rank 5 | 350.0 | 5.0s |
| Level 13 | rank 5 | 350.0 | 5.0s |
| Level 16 | rank 5 | 350.0 | 5.0s |
| Level 18 | rank 5 | 350.0 | 5.0s |
W — Blade's Reach physical
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | 85 | 130 | 175 | 220 | 265 |
| Cooldown (s) | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
Scaling: 110/110/110/110/110% bonus AD.
Kayn W damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 1 | rank 1 | 85.0 | 13.0s |
| Level 3 | rank 2 | 130.0 | 12.0s |
| Level 6 | rank 3 | 175.0 | 11.0s |
| Level 9 | rank 5 | 265.0 | 9.0s |
| Level 11 | rank 5 | 265.0 | 9.0s |
| Level 13 | rank 5 | 265.0 | 9.0s |
| Level 16 | rank 5 | 265.0 | 9.0s |
| Level 18 | rank 5 | 265.0 | 9.0s |
E — Shadow Step none
| Rank | R1 | R2 | R3 | R4 | R5 |
|---|---|---|---|---|---|
| Base damage | no direct damage | ||||
| Cooldown (s) | 21.0 | 19.0 | 17.0 | 15.0 | 13.0 |
Scaling: no scaling.
R — Umbral Trespass physical
| Rank | R1 | R2 | R3 |
|---|---|---|---|
| Base damage | 150 | 250 | 350 |
| Cooldown (s) | 120.0 | 100.0 | 80.0 |
Scaling: 150/150/150% bonus AD.
Kayn R damage by champion level (own stats, no items)
| Level | Rank | Raw damage | Cooldown |
|---|---|---|---|
| Level 6 | rank 1 | 150.0 | 120.0s |
| Level 9 | rank 1 | 150.0 | 120.0s |
| Level 11 | rank 2 | 250.0 | 100.0s |
| Level 13 | rank 2 | 250.0 | 100.0s |
| Level 16 | rank 3 | 350.0 | 80.0s |
| Level 18 | rank 3 | 350.0 | 80.0s |
Kayn ARAM buffs & nerfs (Howling Abyss balance modifiers)
Kayn deals normal damage and takes normal damage on the Howling Abyss.
| ARAM modifier | Value |
|---|---|
| Damage dealt | — |
| Damage taken | — |
| Healing | -20% |
| Shielding | — |
| Attack speed | — |
| Ability haste | — |
| Tenacity | +20% |
| Energy regen | — |
ARAM also starts champions at level 3 with 1,400 gold. The ARAM sheet applies these modifiers to every stat and ability side by side with Summoner's Rift.
Frequently asked
What is the best Kayn build on patch 26.20?
RiftLab's stat-driven build for Kayn Mid is Infinity Edge, Berserker's Greaves, Bloodthirster, Trinity Force, Death's Dance, Lord Dominik's Regards, with Press the Attack as the keystone. It is computed from the champion's damage profile and the opponent's resists, not from win-rate scraping.
Does Kayn have ARAM modifiers?
Yes. On ARAM Kayn deals normal damage and takes normal damage, with healing -20%, tenacity +20%.
How much damage does Kayn's Reaping Slash do?
Kayn's Q (Reaping Slash) has a base damage of 150/200/250/300/350 across its ranks and scales with 170/170/170/170/170% bonus AD. Before the target's resistances; use the Damage Lab for the mitigated number against a specific opponent.
How much health does Kayn have at level 18?
Kayn has 2,406 base health, 114.5 armor and 66.8 magic resist at level 18 with no items, on patch 26.20.
Data: Riot Data Dragon 26.20, Meraki Analytics, LoL Wiki ARAM table. Builds are stat-driven recommendations from RiftLab's optimizer, not win-rate aggregates.