As for why seven days' worth of Sword Qi could instantly kill someone at the peak of the Nascent Soul Realm even though his cultivation had clearly been suppressed to the level of a Qi Refining Perfected Person, that was actually quite reasonable.
Zhang Yuan had refined all his Sword Qi into the [Lamp-Lighting Oil-Adding Pill]. The strand of Sword Qi he had just used was still at the Foundation Establishment Celestial level; its power had not been weakened to that of a Qi Refining Perfected Person.
For an ordinary Celestial Person Sword Cultivator, having their celestial conceptual image suppressed would certainly diminish the power of their Sword Qi as well. This could be considered one advantage Zhang Yuan enjoyed as a [Lamp-Lighting Oil-Adding Pill] Sword Cultivator over ordinary Sword Cultivators.
Zhang Yuan gathered his thoughts and turned his gaze toward the five strands of heavenly gang and earthly sha in the courtyard, along with the Wu Earth they surrounded. With a slight movement of his hand, he summoned them all into his palm.
These five strands of heavenly gang and earthly sha have fairly substantial conceptual images. I'll just refine them into [Primordial Form-Converging].
Although Foundation Establishment Celestials no longer needed to refine heavenly gang and earthly sha, they still had their uses. Their conceptual images could be employed in pill concoction, artifact refining, setting up formations, and so on.
Unfortunately, Zhang Yuan knew nothing about pill concoction, artifact refining, formation arts, or the other hundred arts of cultivation. In his hands, the five strands of heavenly gang and earthly sha were truly rather useless. They could only serve as nourishment to improve his Life-Bound Flying Sword's quality, so he would let [Primordial Form-Converging] swallow them.
Zhang Yuan glanced at the five strands of heavenly gang and earthly sha