Kingdom Hearts: The Stardust of Oblivion

When Sora called to the power of waking, no more did his future self, and history, vanish than Young Xehanort's. Yet woven to the future Xehanort's heart is Yozora, the fourteenth member of the Real Organization Thirteen, and he will sacrifice anyone, and anything, to ensure Ephemer and Skuld aren't now fated to become the new last two guardians of light in another Keyblade War.