Although Xu Qing had never truly fought against six fires, he was well aware of it and could even imagine it.
This was because he understood that at the Foundation Building realm, the appearance of every ball of fire would cause the cultivator's combat strength to increase drastically.
Many times, he even felt that every additional ball of life fire in Foundation Building was like when he broke through to Foundation Building. It was as though he had crossed a major realm.
Xu Qing didn't know if there were other worlds outside the starry sky of this world. If there were, would the various races in those worlds cultivate like them?
Were they also cultivating life fires at the Foundation Building realm? And, experiencing such a huge change with every additional life fire?
This was because Xu Qing felt that the difference between cultivators in the Foundation Building realm was too great.