In ancient times, when a rift formed in the barrier between the human realm and the demon realm, a demon was born. It sought to conquer the human realm and launched a massive war. Countless cultivators willingly joined the battlefield, leaving corpses strewn across the land and rivers of blood in their wake. Eventually, one man appeared. Guided by someone known as the "Heavenly Dragon Strategist," he led his seven subordinates in using an Eight Trigrams seal to imprison the Demon King. Later generations called this the Holy War.
Afterward, that man and his seven subordinates founded the Eight Great Families, each guarding one of the formation's vital points. He also established an organization made up of only twelve people, all exceptionally skilled and possessing extraordinary abilities. He named it the "Twelve Palaces of Yin and Yang," and people came to call him Emperor Xuanyuan.
Ten thousand years later, Emperor Xuanyuan's mantle has passed from generation to generation, as has the legacy of the Twelve Palaces of Yin and Yang. But the power of the Eight Trigrams seal has steadily weakened. After countless clashes, the Demon King finally broke free and returned to the world... Through trial after trial, the protagonist begins his struggle against the "Demon King"...