I spread immortality all over the world

“Ding! There are still ten years left before the demon’s attack!” Su Yang listened to the voice in his ear with a very serious expression. He knew that there were only ten years left before the demon’s invasion, but now, the whole world is full of ordinary people. There is no power to attack. Ten years later, human beings can’t prevent the recovery of demons at all. Fortunately, he awakened the system: “Popularizing immortality System!”