The Darkin Scythe
The Darkin Scythe

Innate: Kayn wields an ancient, sentient weapon, that battles with him for control. Dealing damage against champions causes them to drops orbs that are automatically collected upon leaving combat (including after Kayn's own death), filling a bar above Kayn's portrait.

Once the bar is full he can choose to either be overwhelmed by Rhaast Rhaast or expel him to become the Shadow Assassin Shadow Assassin, based on whether he has damaged more Melee role melee or Ranged role ranged champions, respectively. Once primed, the other option becomes available after 4 minutes.

The transformation can only be performed by interacting with their portrait while on the summoning platform, permanently changing their abilities.

The Darkin Scythe A

Shadow Assassin Shadow Assassin: Kayn's basic attacks and abilities deal 12% - 44% (based on level) of post-mitigation damage as bonus magic damage, lasting for 3 seconds upon entering in combat with an enemy champion, refreshing after 8 seconds out of combat with them or by using Umbral Trespass.

The Darkin Scythe R

Rhaast Rhaast: Rhaast heals for 26% - 43% (based on level) of the post-mitigation damage that he deals with spells against enemy champions.

Ability Details
  • No additional details.

Reaping Slash
RANGE: 350
COST: 50 Mana
COOLDOWN: 7 / 6.5 / 6 / 5.5 / 5
Reaping Slash

Active: Kayn dashes forward, dealing physical damage to all enemies he passes through before flourishing his scythe, dealing the same damage again to surrounding enemies.

「 Physical Damage: 55 / 75 / 95 / 115 / 135 (+ 65% bonus AD) 」「 Total Non-Monster Damage: 110 / 150 / 190 / 230 / 270 (+ 130% bonus AD) 」
Reaping Slash A

Shadow Assassin Shadow Assassin: Reaping Slash is unchanged.

Reaping Slash R

Rhaast Rhaast: Both instances of Reaping Slash's damage are modified to 50% AD (+ 5% (+ 4% per 100 bonus AD) of target's maximum health) physical damage, capped against monsters.

  • Max. Monster Damage: 200 / 250 / 300 / 350 / 400

Regardless of the form, both instances of Reaping Slash deals 55 bonus damage against monsters.

Ability Details

Blade's Reach
RANGE: 700
COST: 60 / 65 / 70 / 75 / 80 Mana
COOLDOWN: 13 / 12 / 11 / 10 / 9
Blade's Reach

Active: After a short delay in which he can't perform any other actions, Kayn performs an upwards sweep with his scythe, dealing physical damage to all enemies in a line and Slow icon slowing them by 60%, decaying over 1.5 seconds.

  • Physical Damage: 80 / 125 / 170 / 215 / 260 (+ 120% bonus AD)
Blade's Reach A

Shadow Assassin Shadow Assassin: Blade's Reach's range is increased by 200, deals an additional 10% bonus AD damage and the Slow icon slow decays over 2 seconds. Additionally, Kayn conjures a living shadow at the casting position to perform Blade's Reach in his stead, allowing Kayn to perform other actions.

Blade's Reach R

Rhaast Rhaast: Blade's Reach Airborne icon knocks up enemies for 1 second.

Ability Details
  • No additional details.

Shadow Step
COST: 90 Mana
COOLDOWN: 21 / 19 / 17 / 15 / 13
Shadow Step

Active: Kayn gains 40% bonus movement speed, is Ghost ghosted and can ignore terrain collision for 1.5 seconds. Immobilizing effects will interrupt Shadow Step.

Kayn heals himself upon moving through terrain for the first time and, if he's not in combat with enemy champions, Shadow Step's duration is increased.

  • Heal: 100 / 115 / 130 / 145 / 160 (+ 40% bonus AD)
  • Empowered Duration: 5 / 6 / 7 / 8 / 9

Entering combat with a champion after the effect is enhanced reduces the remaining duration to 1.5 seconds. The effect also cannot remain active out of terrain for longer than 1.5 seconds.

Shadow Step A

Shadow Assassin Shadow Assassin: Casting Shadow Step removes Slow icon slows and makes Kayn immune to them for the duration. Additionally, entering terrain will increase the bonus movement speed to 70% for the remaining duration.

Shadow Step R

Rhaast Rhaast: Shadow Step is unchanged.

Ability Details
  • PENDING FOR TEST Kayn's definition of "in-combat". The spotlight shows him gaining the empowered duration even after being hit by a non-damaging, which could either mean non-damaging effects don't classify him as being in-combat or that the timer begins after activation.
  • Effects such as Vayne Vayne's Condemn.png Condemn and Poppy Poppy's Heroic Charge.png Heroic Charge apply an immobilizing effect and so interrupt Shadow Step, meaning as Kayn's opponent you do not have to worry about pushing him to safety.
  • Shadow Step R.png Shadow Step is used by Rhaast Rhaast, but has no modified effect.
  • Enemies cannot see Kayn Kayn while he is inside of terrain unless they have terrain-piercing vision, such as Heightened Senses.png Heightened Senses, Hawkshot.png Hawkshot or Comet of Legend.png Comet of Legend.
    • However, enemies will be notified if nearby terrain is infested if Kayn Kayn is within 1000 units - with an indicator being placed on the terrain with a direct line between Kayn and the enemy champion. Slightly less than standard sight radius, but more than the Ambush 2 Camouflage detection radius.
  • Kayn Kayn can move up to 550 units beyond the outer-edge of the battlefield.

Umbral Trespass
COST: 100 Mana
COOLDOWN: 120 / 100 / 80
Umbral Trespass

Passive: Kayn's basic attacks and abilities against champions apply Umbral Trespass for a few seconds.

Active: Kayn infests a marked enemy champion for up to 2.5 seconds, True Sight icon revealing them and becoming untargetable for the duration. Reactivating Umbral Trespass ends it earlier.

Upon reactivation or at the end of the duration, Kayn wrenches himself free from their body in the cursor's direction, dealing physical damage to the target.

  • Physical Damage: 150 / 250 / 350 (+ 110% bonus AD)
Umbral Trespass 2

Shadow Assassin Shadow Assassin: Umbral Trespass gains 200 bonus range and emerging from the target resets The Darkin Scythe A.png The Darkin Scythe cooldown.

Umbral Trespass 2 R

Rhaast Rhaast: Umbral Trespass damage is modified to deal 10% (+ 13% per 100 bonus AD) of target's maximum health physical damage, and heals him for「 70% of the pre-mitigation damage 」「 7% (+ 9% per 100 bonus AD) of target's maximum health 」.

Ability Details