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. Kayn the Shadow Assassin fights Rhaast the Darkin Slayer for control.
Damaging ranged champions charges the Shadow Assassin, and damaging melee champions charges the Darkin Slayer. At full charge, Kayn can permanently transform at his base.
Shadow Assassin: Attacks and abilities deal an additional 52% - 66% magic damage for 3 seconds. This only occurs if Kayn has been out of combat for 6 seconds or used Umbral Trespass.
