Kayn Rhaast is a central character in the game League of Legends. As a skilled Ionian assassin, Kayn wields a sentient, darkin weapon named Rhaast, which seeks to corrupt him. Throughout the game, Kayn battles the weapon's influence, with players choosing whether he embraces Rhaast's power or resists it. Kayn’s internal struggle and his role as a Shadow Assassin or Darkin Juggernaut make him a unique and dynamic champion in the League of Legends universe.