The path of alchemy mainly had two most important steps. First, one had to use a cauldron furnace to refine the various primary and auxiliary materials into powder, and then condense the refined powders into medicinal pills.
It sounded simple, but doing it was anything but easy.
Take refining powder first. It demanded a high level of control over the heat from the alchemist. If the heat was not controlled well enough, it was very likely to cause the medicinal ingredients inside the pill furnace to be scorched, making it difficult to refine medicinal powder capable of forming pills.
The key to controlling the heat lay in the strength of the alchemist's spiritual power output into the pill furnace. This required the alchemist to have excellent control over his own spiritual power output.
When it needed to be strong, it could not be light, otherwise the medicinal powder could not be refined out. When it needed to be weak, it could not be strong either, otherwise it was very likely to turn the spirit grass into a pile of charred grass.
After the powder had been refined, condensing it into pills required the alchemist's pill-condensing techniques. One could not be impatient; one needed patience, and had to control one's spiritual power output steadily as well. Otherwise, with a single moment of carelessness, all previous efforts would be wasted.
The reason Luo Mu chose to refine "Bone Melting Liquid" was because compared with other medicinal pills, "Bone Melting Liquid" was far easier, since refining "Bone Melting Liquid" did not require pill condensation at all!
Bone Melting Liquid—rather than calling it refining, it would be better to call it compounding, because once the medicinal powders were refined, all the refined powders only needed to be mixed together with clear water, cutting out