The Tale of Niphits: And the Wars of the Three Demons

A hero of the past emerges in a future to find the world overrun by demons of nature, war, and disease. The allies the accidental time-traveler Fleet had in the past have all either died trying to fight the demons or surrendered to their will. Fleet must scour the mortal world for any last characters still powerful enough to fill the void of the missing gods and form a new band of guardians capable of avenging the mortal realm from the Three Demons. Along the way, he must battle a race of powerful beings known as the primordials, recruit new allies, and locate the only weapons capable of defeating the demon overlords.