According to the records within the "Eight Trigrams Purple Gold Furnace," Samadhi True Fire was true fire jointly nurtured by fire within wood, fire within stone, and fire within the air. It was precisely the flame required for refining superior pills.
Samadhi True Fire was also the flame exclusively used by immortal cultivators. Unlike mortal flames, ordinary water could not extinguish it. It was far more formidable than the little flames Zhang Xiaohua could currently produce.
Looking at the wisp of pale red flame within the pill furnace, Zhang Xiaohua seemed unable to feel any heat from it. He took a piece of green jade from his robes, shaved off a piece with his little sword, and tossed it into the flames. With a sharp "hiss," the thumb-sized piece of jade immediately turned into a wisp of green smoke.
Seeing this, Zhang Xiaohua nodded inwardly. He shaved off another piece, sent a spell formula into the flames, and only then tossed in the jade. This time, the jade did not immediately turn into green smoke. Instead, under the tempering of the flames, it gradually shrank until it was refined into a bean-sized drop of jade liquid. Zhang Xiaohua beckoned, and the jade liquid flew out of the furnace and hovered before his eyes. He examined the verdant, glistening jade liquid, then swept it with his divine sense. It actually gave off faint ripples of primordial qi.
Samadhi True Fire truly is wondrous! Zhang Xiaohua secretly sighed. Still, this fire should be used to refine high-grade pills. Using it for low-grade pills would be like killing a chicken with an ox-cleaver—not worth the cost.
After extinguishing the Samadhi True Fire, Zhang Xiaohua examined the eight sides of the furnace. Each side had a furnace opening, and each opening had a name: