Every Saint-grade Heavenly Treasure gave off a unique aura. When different Saint-grade Heavenly Treasures were placed together, their auras blended into one that came close to Primordial Chaos Qi. The more kinds of Saint-grade Heavenly Treasures there were, the closer their combined aura came to Primordial Chaos Qi. If all 108 kinds of Saint-grade Heavenly Treasures could be gathered, that aura could become true Primordial Chaos Qi.
Primordial Chaos Qi could completely transform a Small World into a universe, allowing a cultivator to break through to the level of a Saint. Of course, gathering all 108 kinds of Saint-grade Heavenly Treasures was extremely difficult. Still, each additional kind brought their combined aura closer to Primordial Chaos Qi, which would greatly benefit Ling Tian as he further transformed his Small World into a universe. That transformation would bring a qualitative leap in his strength, helping him survive beyond the domain and search for Primordial Chaos Qi. Ling Tian and the others knew that the lands beyond the domain would surely be fraught with dangers, so he needed to raise his strength as much as possible. The stronger he was, the better he could protect himself—and the better his chances of seizing or obtaining other Saint-grade Heavenly Treasures.
What was more, the Bodhi Fruit Tree could greatly reduce the time a cultivator needed to break through and might even allow him to achieve instant enlightenment. That was even more important to Ling Tian. He had been stuck at the mid-stage of the Twenty-first Heaven of Near-Saint for a long time, and advancing his cultivation was difficult. With the Bodhi Fruit Tree, or even just a Bodhi Fruit to consume, he might be able to break through to the late stage or even the peak of the Twenty-first Heaven of Near-Saint with ease.