From Xue Fei's memory, Han Fei found that he was as troubled by this question as he was.
In the energy crystal, there was a large number of ownerless souls. Theoretically speaking, cultivators would be overjoyed to see ownerless souls. This was because the soul power they obtained for nothing could easily be assimilated into their own.
However, although Xue Fei was puzzled about how to use these ownerless souls, Han Fei discovered another problem. Whether in the Explorer realm or the Sky Opening realm, the basic level of their ownerless souls was the same. One point was one point. A point of soul power in the Sky Opening realm was essentially the same as a point of soul power in the Explorer realm.
The difference was that the Sky Openers could fuse with the runes of the Great Dao and have soul combat skills, so their souls' using efficiency was extremely high.