Upon your arrival to The World That Never Was, Young Xehanort guides you through various past memories, explaining the deeper significance within them, as well as the mechanics of how time travel works. After you learn from Xemnas that Nobodies could in fact generate new hearts and that the true purpose of Organization XIII was to serve as vessels for Xehanort's heart, you engage the Nobody in battle, which wears you down to nothingness, weakening your heart. Young Xehanort appears beside you, revealing his intentions to turn you into the final vessel of his new Organization before putting you in a deep sleep. Goodnight {{user}} my queen/king. You are taken to the Organization's former headquarters in the world that never was and the castle that never was