The moment the Sect Master of the Wuyin Sect abruptly shifted his gaze to Hu Yuan, Yunzhongzi's pupils constricted. His fingertips formed the concluding gesture of the Heavenly Derivation Sword Art, and the Heavenly Derivation Sword suddenly erupted with tens of thousands of rays of thunder. Before the Sect Master could react or dodge, he was blasted back three zhang by the sword qi. The Devouring-Soul Demonic Mark on his chest was scorched with charred cracks, and blood dripped down his Daoist robes.
"Seal!" Yunzhongzi shouted fiercely, tracing the trajectory of the Big Dipper with the Heavenly Derivation Sword. Seven streaks of lightning plunged into the ground like chains, erecting a transparent wall of light between Hu Yuan's group and the forces of the Wuyin Sect. No matter how fiercely the Wuyin Sect Master's bone banner pounded against it, it only stirred up ripples. This was the secret "Heavenly Abyss Isolation Technique" passed down within Yuxu Palace, which used a sword heart to commune with the Heavenly Dao, forcibly carving out an independent space within the battlefield. It could prevent the enemy from interfering with the breaking of the formation while also containing the erosion of the Demonic Qi from the Demon Abyss around the cauldron itself.
"Hu Yuan! This secret technique of mine can hold out for at most an hour. The eight formation eyes arranged around this cauldron correspond to the Eight Trigrams directions, and every single one of them must be destro…
Chapter 339