I'm a Spy in the Fairy World

The age of mythology, which had prospered for a long time since the beginning of the world, suddenly ushered in destruction under the doomsday catastrophe. The three realms are shattered, the laws are annihilated, the immortal path is damaged, and the spiritual veins are cut off. Countless immortals have fallen, and countless mortals have turned to ashes. So ghosts and immortals were everywhere, and corpses were everywhere. It was not until those billions of years later that human civilization could reappear. In that land revered as the 'immortal world', the new immortal way has revived and is heading towards glory again. And in the starry sky hundreds of millions of light years away from that land, there is also a civilization that is rising. ... New calendar year 11893, summer. Wang Xu, a freshman in the Intelligence Department of the First University of the Star Alliance, was sent to the Xuanhuang Immortal Realm to perform an undercover mission.