Returning to the Appraiser Hall, Zhang Xuan immediately headed to his living quarters, secluded himself within a chamber, and immediately activated the Spirit Gathering Formation.
Having collected innumerable books, learned two dans of Heaven's Path Formation Art, sapped dry his Sword Intent, Saber Intent, and Spear Intent, Zhang Xuan was already terribly exhausted. If not for an adamant will driving him, he would have long collapsed.
Sitting at the center of the Spirit Gathering Formation, he flicked his hands and a pile of spirit stones appeared around him.
Tzzzzzzzzzz!
As soon as the spirit stones were placed in the formation, the spiritual energy harnessed within was immediately extracted. As though vegetables being placed within an oiled wok, a sizzling sound could be heard. After which, the concentration of spiritual energy in the surrounding started rising swiftly.
Threefold!
Fourfold!
Fivefold!
...
It is believed that the consumption of material sustenance is 'inferior' in practice as they contain impurities, and one would only be accumulating impurities in one's body. These impurities limit one's growth and caps one's lifespan. As such, the first stage of cultivating tend to be 'Body Tempering' (In this novel, it's probably Fighter 4-dan Pigu realm) to rid oneself of the impurities within one's body.