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 Wild Wolf Valley, you could see mountain caves left everywhere by gold-eating boas which had occupied the valley before, just like the one in front of Zhang Tie.
This cave was at the top of a hill in the middle of Wild Wolf Valley, the entrance of which was almost 3 m in width. In its surroundings, there were some huge grooves that looked to have been ploughed through. Given the terrain, the hill seemed to have been destructed by external forces. He could see obvious marks left by human beings.
However, the most important part was that Zhang Tie found some tunnels in the cave left by gold-eating boas. Since the cave was almost horizontal to the ground like how a mouse drills its den, he could easily walk inside with the sun’s light. The weather had turned for the better today, so sunlight could reach dozens of meters inside the cave. Under it, Zhang Tie immediately saw two tunnels inside.