No need for the complexity of mortal craftsmen; with An Jing's control over metals and precise manipulation abilities, he could lift his hand and purge all impurities from the spiritual material, refining it instantly.
After the purging, it only took a thought for the golden-red molten iron to fly out of the crucible and fall into a mold to set.
In this process, if it were a mortal blacksmith, he would have to forge the material as it gradually cooled, further tempering out impurities to form the alloy.
But for an artifact cultivator, their task is not "to forge the embryo" but to imprint prohibitions using their spiritual power into the raw material.
Just as An Jing created countless Taibai Law Prohibitions within his body, gradually filling his whole body, he also needed to infuse his spiritual power into the artifact embryo, branding it with various desired effects.
