The Blood Ancient God reminisces about the past.
A thousand years ago, it began its scheme, contaminating the Mad Dragon King and teaching him the Demon Skill. The Demon Skill allowed one to siphon others' Qi-Blood for cultivation, progressing rapidly but with the risk of madness, thus being eradicated by the Kongwen Divine Monk of the Dadu Dynasty.
However, the Demon Skill was never truly extinguished.
It was collected by the Carefree Travel.
Tang Zheng joined the Carefree Travel, switched to practicing the Demon Skill, and amidst the chaos of the world, ascended to a Great Grandmaster. According to its plan, Tang Zheng should have grown even stronger before it would descend. By then, its vessel's strength should reach a top-level Heavenly King's standard.