With a jade seal, you can freely travel through different worlds.

Originally thought it was an ordinary ancient world, Lu Zheng, who has no ambitions, plans to be a free little man, enjoy the life of a rich man, find a few red sleeves to add fragrance, go shopping and eat to finish this unpretentious and boring life. .

Until… after giving a meal to the beggar at the door, Yuyin got a few strands of luck…

The fox girl arrives on the day, and the ghost comes at night.

Quanzhen came to the door, and the Zen master blocked the way.

It turns out that the world is not easy…

After the Catastrophe, every rule in the world was rewritten.

In the Age of Black Iron, steel, iron, steam engines and fighting force became the crux in which human beings depended on to survive.

A commoner boy by the name Zhang Tie was selected by the gods of fortune and was gifted a small tree which could constantly produce various marvelous fruits. At the same time, Zhang Tie was thrown into the flames of war, a three-hundred-year war between the humans and monsters on the vacant continent. Using crystals to tap into the potentials of the human body, one must cultivate to become stronger.

The thrilling legends of mysterious clans, secrets of Oriental fantasies, numerous treasures and legacies in the underground world — All in the Castle of Black Iron!