Under the Introspection of his Martial Arts Celestial Eye, he could see the purplish-black medicinal potency writhing like a living creature within his spinal canal. With every inch it advanced, the beginnings of new meridians coiled around the surface of his bones.
The most intense agony came from his seventh thoracic vertebra, the spot recorded in the Hundred Bone Profundity Technique as the "Spiritual Core Node."
There, the potency of the Meridian Opening Pill abruptly exploded, transforming into thousands of purple threads as fine as hairs, which radiated outward like a spiderweb.
Xu Yunfan let out a muffled grunt, his back arching like a shrimp. His spine groaned, unable to bear the strain.
Those purple threads brutally pierced through the periosteum, building phantom bridges within his flesh and forcibly creating a top-to-bottom connection—a network for energies like True Qi and True Essence to circulate.
"ARGH!!"
