The sixth step involves diluting the raw materials (rotten fish, shrimp, and human and animal excrement, etc.) with water and spraying them into loose clay and fine sand through a special pipeline.
The seventh step is to periodically sprinkle some wood ash (mainly potassium carbonate, with a small amount of potassium sulfate) onto the loose soil so that potassium nitrate can be obtained directly after scraping the soil.
Finally, by taking advantage of the differences in solubility of various salts and controlling the temperature and concentration, potassium nitrate is crystallized from the mixture, thus obtaining high-quality saltpeter for making gunpowder.
After nearly a month of busy work, the first batch of products from microbial nitrate production was delivered to the Rachel biochemical plant, the explosives production line was restarted, and a steady stream of explosives was delivered to the Cumberland troops.
With explosives and mutants, the Twilight Knights swept through the entire eastern region of the Silver Ring Kingdom. The castles of more than seventy nobles, large and small, were riddled with holes. The garrison and mercenaries were as weak and powerless as children in front of the mutant soldiers, and countless treasures were transported into Twilight Town.
The Church of the Father, the Holy Guard City, the Silver Ring City, and the Barbarians—these four forces gradually turned their attention to this newly rising knightly order.
One day in early July of the year 1171, Tristan entered the headquarters of the Knights and knocked on the door of Todd's room with a letter in hand.
"Commander-in-Chief, I've come to say goodbye. I need to return to the capital of the Papal States tomorrow."
Todd looked up from the pile of documents at the church deacon who had been living in Muxi Town for more than half a year and asked, "Tomorrow? Why the rush?"
Tristan solemnly stated, “There are two matters. First, the First Inquisition just announced its verdict on the ‘Cataclysm of Truth’ a week ago, finding the teachers and students of the Royal Academy guilty. Starting next month, they will be sent to the stake in batches. Second, the Church has sent a document to the Knights of Twilight…”
The deacon placed the letter on Todd's desk, and the latter opened it and looked at it again and again, his brows furrowing more and more.
In the official document, the Church demanded that the Knights of Twilight capture the heavily guarded military stronghold of the Silver Ring Kingdom—the North Stone Mine—by the end of September. In return for this mission, the Church would recognize Todd's ownership of the conquered land and agree to allow the Knights of Twilight to establish a secular kingdom.
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