The protagonist cultivates his state of mind. The Demon King represents the inner demon, while the Fighting Buddha represents the mind and spirit. The post-apocalyptic zombies and the like are merely a backdrop, there to expose human nature. The protagonist undergoes trials of human nature, then uses his spirit to defeat his inner demon and attain godhood.
The story includes evolutionary mutations; an original, fully developed mutation system; clashes between human mechs and zombies, with real-world weapons brought into the novel to fight the undead; a war between the planets of the demons and the gods; the protagonist's wuxia spirit; some plot elements from Journey to the West; ocean monsters transformed by the zombie plague; an overprotective brother who dotes on his sister; deeply angsty romantic drama in the later chapters; unusual mutants, such as brain-like monsters and combinations of humans with various creatures; portrayals of human nature; and all kinds of post-apocalyptic facilities. This is completely original, though the writing quality is inconsistent. Stick with it to the end and you won't regret it. Keep it up, everyone! I'm outta here.
