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**
"Principally yes?" Zhang Tie knew that it was not that easy given the tone of Heller.
"Yes. Castle Lord, you have to know some points!" Heller said calmly, "The daily output of the aura value couldn't match the basic energy that could be gained by the Abyss of Elements each day. If not include the aura value points that you have accumulated over the past years, the daily aura value increase that could be produced by plants in Castle of Black Iron could only form 0.16 square mile's land which could contain ores. Unless you expand the current land area of Castle of Black Iron by over 30 times, namely having it reach at least 7,000 square miles while being covered with a wood on its surface could the daily aura value increase match the daily basic energy increase and meet the constantly expansion of the space of Castle of Black Iron. The premise is that Castle Lord has to provide enough merit value points!"