I Fight for Heavenly Tomes Across the Nine Realms

They say that hidden among the Nine Realms is an exceedingly mysterious domain known as the Cloud Domain. A young spear wielder just starting out accidentally discovers a prophecy of an apocalypse that will destroy the world. With the appearance of a mysterious heavenly tome, can the young heroes find the answer to saving the world? (Coming up with a synopsis is so hard! The author has chronic procrastination and updates slowly, but I hope I can finish this story.)