Ryu was on his way home from a mission and was able to witness Itachi and a stranger talking about massacring the Uchiha. He was tell his parents about what gonna happen until he is struck by 10 Tribulations and instead of dying he and his other self of Earth switched Souls and gets send of to Against the Gods. Weird thing thought he fell in the Snow Song Realm with the power Half-Step Divine Extinction Realm.