THE FOUNDER
When a soul becomes strong enough to break the barrier into the grandmaster the level, there comes a qualitative change in the person's soul space. The changes appear in the form of increased soul space capacity and a spike in quality and density of the soul Qi. Some practitioners who are lucky enough to possess a suitable body type or a natural talent in soul energy gain massive benefits from this change.
Lu Ming's case was a similar one. Since he practiced the Heaven Pestle art, soul-nourishing formula, and the soul calming mantra, his soul space was embedded with ancient runes. These runes underwent a drastic morph when he crossed the boundary of the soul grandmaster. It has managed to catapult not just his soul space capacity, but also the control and manipulation of soul Qi.
"I could easily refine all the pills recipes I was practicing with." The ecstasy of managing to overcome a great barrier like this improved Lu Ming's mood.