Within an original infinite-world framework:
Add some supernatural abilities, a dash of paranormal elements, and a touch of youthful romance.
Then pour in stories of wilderness survival, sci-fi machines, fantasy legends, martial arts power struggles, interdimensional trade, modern warfare, endless reincarnation, post-apocalyptic survival, and evil god invasions.
Next, season with a lethal dose of wild ideas, angst, sugar, and melodrama.
Finally, throw in a dumbass author whose head is full of self-indulgent fantasies.
Chop it up, mash it together, and stew it all in one pot.
And you get a flop of a novel titled Spirit Realm Invasion.