The charcoal room.
Luo Xuan.
The nobles' merchant caravans had brought back vast quantities of stone carbon, which was snapped up for fuel.
The palace was no fool, either. It had bought plenty.
They had stopped taking in charcoal. Stone carbon now served as their main fuel.
A while ago, amid the embezzlement at the Armory, there had been a great clamor about recasting weapons, even clashes with the nobles. In reality, progress had been sluggish because too many people were taking time off.
They had barely managed to finish casting the armor. The most crucial part, the blades, had yet to begin.
Luo Xuan oversaw everything in the charcoal room. Smelting copper and casting weapons required charcoal, so he was fairly busy.
After burning charcoal for a while, Luo Xuan got his hands on stone carbon.
At first, he treated it only as a substitute for charcoal. But one day, something suddenly came up while he was burning stone carbon, and he temporarily put out the furnace.
When he returned to start it up again, he discovered that the stone carbon left in the furnace seemed to have been charred. When burned, the residue gave off very short blue flames and intense heat, burning slowly and steadily.
Luo Xuan understood. This was where the merit lay.
If King Zhou had not opened his eyes, he would probably still have been walking down the wrong path, researching ice bottles.
Honestly, what could an ice bottle that let one observe changes in heat and cold accomplish?
Not much. But the stone carbon residue discovered while burning fuel was a different matter.
As an immortal, Luo Xuan possessed no fewer than five magic treasures whose names he could list, and even more whose names he could not.
The reason was simple: he