Ever since he had mastered the sword array technique, Zhou Xun had shifted his primary focus to advancing his cultivation.
Inside his immortal cave in Zhenhai Immortal City, Zhou Xun sat cross-legged on the ground, his eyes half-closed. Following the pathway of the *Purple Firmament Lightning Art*, he ran a complete macrocosm circulation that ultimately refined the energy into mana, which was then absorbed by the Nascent Soul at his Dantian.
Perhaps because the cultivation technique was far too domineering, miniature vortexes of spiritual energy formed directly across the surface of his skin.
Chapter 594