According to legend, when the world was still in chaos, thirteen powerful people came to this extremely chaotic world. No one knows where they came from, but later generations call these thirteen powerful people the Thirteen Ancient Gods.
But in the chaos at that time, there were not only the thirteen ancient gods, but also a ferocious beast. The ancient gods named it the sky-swallowing beast. The sky-swallowing beast was extremely violent and violent, and it coexisted with chaos. If the sky-swallowing beast does not die, the chaos will never be destroyed. In order to relieve chaos, the Thirteen Ancient Gods forged a world and fought against the ferocious beast for decades. What the Thirteen Ancient Gods did not expect was that the combined attacks of the thirteen of them were unable to defeat the ferocious beast.
