Surface – the disaster you see
In 2026 AD, a space crack suddenly appeared in the sky, and countless alien beasts fell to the world like raindrops. The city instantly turned into ruins, and human civilization was paralyzed. The cracks continuously release something called "source energy", and some humans awaken to supernatural powers, but this is far from enough - the alien beasts are getting stronger and stronger, and humans are retreating steadily.
Middle level - this is not a natural disaster, it is a breeding farm
The end of the world is not as simple as a natural disaster or an alien invasion.
