A long time ago, when the heavens and earth first opened, all things were in chaos.

The Ancestor of Creation created many living beings and endowed them with the ability to survive and evolve. They dominated an era, moving from the oceans to the land, and from the land to the sky.

That era was the era of the ancient beasts, the first creatures born into the world, and the original beings.

The ancient beasts were born before ancient times.