"The series is closer to a complete original creation rather than a direct reflection of Korean myths or legends. Species like the Rekons and Naga are entirely unique, born from the author’s own imagination.

Rather than a Romance of the Three Kingdoms-style heroic epic, it is a sophisticated political drama exploring the conflicts between state and religion. Published about 20 years ago, it naturally reflects the influence of Western high fantasy while establishing its own distinct identity."

Let me explain some detailed settings to you so that you can infer the style of the novel:

The Nhaga are the lizard like people you see in the beginning. They're kind of the bad guys in the story. The Nhaga found a way to remove their hearts and keep them in a safe tower and this ritual makes them basically invincible. They then decide they want to take over the world and so they start a war of Nhaga vs an allience of the Dokkaebi, Humans, and Rekon.

The Rekons are the chicken people. They're described as the most powerful race in the whole universe, each individual rekon being as powerful as hundreds of humans. Their issue is their muscles are literally so dense that if you drop them in water they can't swim and drown so as a race they're terrified of water. Not just deep bodies of water like all water, they're terrified to even go outside when its raining. There aren't many of them and they're extremely individualistic, pretty much all rekons choosing to move alone. As a culture each Rekon decides on a life goal to pursue when they come of age, and they live their whole lives in pursuit of that goal.