It seems deducing the origins of those black-clothed cultivators from the cultivation techniques they use is rather unlikely—Yu Sheng never knew that one could "correspondence study" cultivation like this.
However, True Man Yuanling did gain some insights from those black-clothed individuals.
"Those who attacked you have solid body cultivation foundations, and most of them show traces of bone washing and marrow cleansing, indicating changes in their bloodlines. Such features are common on frontier planets with low levels of development—these immigrant planets often have environments not fully transformed, with harsh cold or heat, acidic toxic radiation outside the dome. The pioneering cultivators who settle at the border, despite having protective magic treasures, still undergo bodily modifications for safety."
Yu Sheng quickly realized: "You mean, none of these people are locals of the Taixu Spirit Hub? They're from the borders of the Feiyu Star Domain?"
