Currently, the easiest way for Ning Yuchan to improve is through Star Power cultivation.
Ning Yuchan can take one or two Ten Thousand Spirit Blood Pills, and also use a few of the newly acquired Purification Pearls.
If Xu Jin could sweep and hunt down a few more Gold Pillar alien races within the Seven Killings Secret Realm, especially the seventh-tier ones, he might obtain a few more seventh-tier Purification Pearls.
The actual effect of using Purification Pearls for cultivation is unknown, but according to that previous sixth-tier captive...
Sixth-order Purification Pearls can enhance a fifth-tier cultivator by one or two cultivation layers, but it takes more than ten to improve a sixth-tier cultivator by one layer.
In a situation without much error, accumulating Ning Yuchan's Star Power cultivation to the Ninth Layer Peak of the Fifth Tier should be no problem.
