[Not a power fantasy + not invincible + transmigration again + supporting-character focus + multiple Systems + spiritual energy depleted + lighthearted]
With the help of the Longevity System, He Chang coasted for seven hundred years.
Just when he finally managed to transmigrate back to the modern world, the System dragged him back to the Continent of Spiritual Energy.
He was tasked with cleaning up the colossal mess the world had made: twenty-four protagonists had all transmigrated here by mistake, throwing everything into chaos.
Either He Chang saves the world, or the world goes down with him.
Having transmigrated again as a demon king, He Chang grips a stick and prepares to have a talk about life with the protagonists.
