Fed from the dark energies from the never ending battle of Shadow and Sonic forces, while using Blaze as a cover for his own actions he was the creature that started the first battle, and the first draw of blood, when Sonic took both life of a villain and of a innocent....... after 5 years of clashes, the demon from a erased timeline have return setting to destroy the universe around him as revenge, Sonic and Shadow must work as one or else all is doom