Su Shi'er's hand seals shifted, and the formation arranged around him surged forth once more, concealing his figure.
Sitting cross-legged within the formation, Su Shi'er did not immediately refine the spiritual qi around him to raise his cultivation.
With a flip of his palm, two Jade Slips appeared in his hand.
One of these Jade Slips contained the Star Soul Art of the Heavens, which he had obtained by making an agreement with Tang Zhuying—to help her accomplish something in the future with his Immortal Body in exchange.
This secret art targeted a cultivator's soul. Once cultivated, it could stabilize and strengthen the cultivator's soul.
If Su Shi'er wanted his Immortal Body's cultivation realm to advance further and reach the realm of a Second Tribulation Loose Immortal before his consciousness returned to his original body,
then this secret art was something he had to cultivate.
And secret techniques such as this were no different from cultivation methods. From first learning the basics, to minor accomplishment, to reaching the height of perfection, all required time and constant practice.
Even after mastering it, one had to continue cultivating it in order to steadily strengthen one's soul.
If he waited until his cultivation realm had advanced before cultivating this technique, who knew how much more time it would take? That would undoubtedly be far too late.
Learning it early and practicing it alongside his cultivation during seclusion was the correct approach.
That way, once his Immortal Body's cultivation realm advanced again, his soul would have nearly condensed as well.
The other Jade Slip contained the secret art, Essence Condensing Art, gifted to him by Sect Master Ren Yunzong.
Cultivating this art allowed one to actively temper and compress one's own power, discarding the dregs and retaining the essence, making a cultivator's strength purer