At the same time, cultivating six spiritual roots, the alchemical crystals were the rarest things of all. After all, to the old man, alchemical crystals were impurities expelled when heavenly treasures and earthly treasures were refined into pills. The attributes within those impurities were naturally mixed and ever-changing. If one were not cultivating all six spiritual roots at once, they would be an utterly unimaginable heretical material. Even with an abundant supply of Yin-Yang Qi, no one would touch this stuff.
But I was different. With the wood element as my foundation, I chose alchemical crystals rich in wood attributes, mixed with large amounts of water attributes and trace amounts of other attributes, and used them as a catalyst. The extraction process was simple: I placed the alchemical crystals over the five centers and relied on circulating my cultivation method to use Yin-Yang Qi to draw out, dissolve, and extract them.
Once the power of the wood attribute was sufficient, the attributes of the alchemical crystals restrained by it disintegrated first. I then used that disintegrated power to break down the crystals' other attributes. In this way, the six spiritual roots attacked and dissolved one another in a cycle, while all the decomposed attributes were classified and absorbed into my body without reservation, then placed within my Spirit Vein through the circulation of my cultivation method.
The extraction process was not fast at first, but as I grew more skilled and my understanding of the alchemical crystals became clearer, the speed picked up as well. After about half a day, I had completely refined an entire box of alchemical crystals. With that, I had reached the point where I could attempt to break through to the Foundation Establishment Middle Stage.
Breaking through each level was a process of stabilizing the