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 humans and demons 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! Written by Drunk Tiger, this novel is a prime example of fantasy steampunk. Let us journey through the world of limitless possibilities and inventions together! ------ **Warning: This novel contains mature content**
In the deep and dark underground cave, after working hard for a day and eating something casually, almost all the human captives fell asleep in hunger and fatigue.
They were sleeping in those dim mountain caves of the underground space. Some of the caves were pitch dark. According to the miserable practices and lessons of human captives, In the dark environment, people had the best sleeping effect and recovery of the body energy at the fastest speed. Those who liked to sleep in bright places could not survive long in such an environment. They had long become bones. Even their bones could not be found.
Because of this, all the human captives would choose to rest in quieter and more hidden places.
Additionally, Zhang Tie found that those human captives who opposed to eat human fleshes didn't sleep together with those who had eaten human fleshes. They were sleeping in different caves. In this way, they might feel a bit safer.