Kayn

Innate: Kayn has a secondary experience bar that progresses toward unlocking his Darkin and Shadow forms. He gains experience toward either form by taking down or dealing damage against melee or ranged champions (for Darkin and Shadow, respectively). Each completed form will appear at the summoning platform. Kayn can collect it to permanently transform over 6 seconds, restoring to full health and mana and becoming invulnerable, untargetable, and unable to act. The transformation will grant a passive bonus and empower some of Kayn's abilities. He gains a one-time Homeguard once the transformation is complete.

Shadow Bonus: For 3 seconds upon entering champion combat, Kayn deals 48% - 62% (based on level) of post-mitigation damage dealt against champions as bonus magic damage. This effect is primed after 8 seconds without champion combat, or upon casting Umbral Trespass.

Darkin Bonus: Rhaast's abilities will heal for 24% - 38% (based on level) of post-mitigation dealt against champions.

Active: Kayn dashes in the target direction, dealing physical damage to enemies he passes through. He then sweeps around, dealing the same damage to nearby enemies.

Both hits deal 35 bonus physical damage against minions and monsters.

Darkin Bonus: Reaping Slash instead deals 60% AD (+ 7% (+ 6% per 100 bonus AD) target's maximum health) physical damage with each hit, for a total of 120% AD (+ 14% (+ 12% per 100 bonus AD) target's maximum health). This damage has a cap against monsters that does not include the bonus damage.

Reaping Slash's dash speed scales with Kayn's total movement speed.

Active: Kayn sweeps up in the target direction, dealing physical damage to enemies hit and slowing them by 90% decaying over 1.5 seconds.

Shadow Bonus: Blade's Reach area is extended. Kayn conjures an untargetable shadow at the casting position to perform Blade's Reach's sweep over 0.55 seconds in his stead, removing the ability's cast time.

Darkin Bonus: Blade's Reach knocks up enemies hit for 1 second.

Active: Kayn gains 35% bonus total movement speed and the ability to ignore terrain collision for a duration. He heals upon his first entry into terrain, and he gains unobstructed vision while inside terrain.

If Kayn has been in champion combat during Shadow Step or within the last 3 seconds, the duration is reduced to 1.2 seconds. This effect also cannot remain active out of terrain for longer than 1.2 seconds and will cancel immediately if Kayn performs a basic attack or becomes immobilized or polymorphed.

Shadow Bonus: The cooldown is reduced to 10 seconds at all ranks. Kayn gains 100% slow resist while active and, upon entering terrain, the bonus total movement speed is increased to 70% for the remaining duration.

Passive: Kayn marks enemy champions he damaged in the last 3.15 seconds.

Active: Kayn vanishes and dashes to a marked enemy champion. Upon arrival, he channels for up to 2.5 seconds, attaching to the target and revealing them. Umbral Trespass can be recast after 0.75 seconds, and does so automatically after the duration or if interrupted.

Recast: After a 0.75 -second delay, Kayn deals physical damage to the target and dashes out from their body in the target direction, detaching himself from them and becoming targetable again at the end of the dash.

Shadow Bonus: Umbral Trespass gains 200 bonus cast range and emerge range.

Darkin Bonus: Umbral Trespass instead deals physical damage equal to 15% (+ 13% per 100 bonus AD) target's maximum health, and heals him for 12% (+ 10% per 100 bonus AD) target's maximum health.