According to some secrets left behind from the Ancient Era, before the beginning of the Epoch Catastrophe, the Heavenly Demons will massacre all the living beings in the universe.
Now that the Heavenly Demons are already appearing in groups, their numbers will inevitably grow, and by then these demons might attack the Great Sum Empire. This is why the Rainbow Empress is having Lu Chen prepare.
Upon hearing Lu Chen's confident response, the Rainbow Empress immediately thought of that Immortal Artifact Lu Chen had brought out.
Indeed, with that Immortal Artifact, the Heavenly Demons might not be able to invade the Great Sum Empire.
However, speaking of which, if the Heavenly Demons directly appear in the Star Domain ruled by the Great Sum Empire, the Immortal Spirit Umbrella seems to have no effect.
