Kingdom Hearts χ is set before the legendary Keyblade War, when disputes between Keyblade wielders over the Light that created the world sparked a war between Light and Darkness, triggering a calamity that created the present-day layout of the Kingdom Hearts world. Prior to the war, an unnamed Keyblade Master bestowed a book called the Tome of Prophecy to five of his six apprentices before disappearing. The Tome has the ability to predict and even manifest objects and people from the future. The five apprentices learned to a prophecy foretelling the world falling to Darkness and the Light being destroyed. In order to prevent this, each of the apprentices decided to attempt to prevent the prophecy from coming true. As part of their efforts, they used the Tome to manifest powerful warriors from the future as the Fragments. Each eventually begins hoarding pieces of Light, called Lux, from the monsters known as Heartless, and each creates their own factions themed around their individual animal icon: Ursus, Anguis, Unicornus, Leopardus, and Vulpes. The player character, a newly awakened Keyblade Wielder, chooses to support one of the factions and works to ensure the chosen factions supremacy. The story will lead into the beginning of the Keyblade War.