The roar of machinery rose within the Undead Demiplane. Under the gaze of Huo Yuhao and those beside him, a new production line officially started up.
Cartloads of rare metals prepared in advance were fed into a furnace specially made by the Demon Race.
The melting points of some rare metals differed, and the temperatures the furnace had to withstand were extremely high. An ordinary furnace could not meet those requirements.
They also had to ensure that different rare metals could fuse at their respective melting temperatures.
Thus, with the help of Huo Yuhao and the others, they had built this Soul Guidance Furnace. The entire furnace had been made through alchemy using the most heat-resistant materials, and its interior had been divided into layers.
Magic arrays had been inscribed throughout each layer, along with enchantments that granted affinity with the fire element, allowing the temperatures in different layers of the same furnace to be isolated and controlled.
Different rare metals were heated at different temperatures until they reached a suitable state-liquid, in fact-and their differing melting points meant that temperatures too high or too low would damage their quality.
An alchemy magic array had been installed at the bottom of the furnace. Once the different rare metals melted, the partitions between them would open, and the various liquid rare metals would flow into the alchemy magic array at the bottom, where its influence would fuse them into a single whole.
The entire furnace had nine layers and could smelt rare metals at up to nine different temperature levels. The metals it held were sorted not by type, but by melting point, so in theory, it could smelt a great many kinds of rare metal alloys.
High-quality rare metals were ultimately scarce, so this smelting method allowed low-quality and high-quality