When Jiang Ping'an teleported back to the skies above Original God Palace City, the Yellow Emperor, the White Emperor, and Su Nü had already begun purging the Demonic Qi within the city.
The Yellow Emperor brought out the Thick Earth Sword, using the power of the earth to force out the Demonic Qi that had seeped into the city's foundations, turning it into wisps of black smoke that rose upward.
The White Emperor, meanwhile, used Geng Metal Sword Qi to cut apart the cores where the Demonic Qi had gathered, shredding them to pieces.
Su Nü sat cross-legged atop the highest palace roof in the city. The music of the Fifty-String Jinse spread outward like ripples, and wherever the sound waves passed, the remaining Demonic Qi melted away swiftly like lingering snow beneath a blazing sun.
The three worked together with perfect tacit understanding, and their progress was rather quick. However, the entire city stretched more than a million li across in both directions. Even with the methods of Immortal Gods, thoroughly clearing away the Demonic Qi was not the work of a single morning or evening.
Jiang Ping'an landed atop the Original Demon God Hall at the center of the city, and his Spiritual Sense unfurled, enveloping the entire city.
He used his Heart Force to sense the Demonic Qi remaining in every inch of land and every brick and stone. Then he thrust the Tribulation Extinction Divine Spear into the palace roof beneath his feet, and Tribulation Qi transformed into countless black bolts of lightning as fine as strands of hair, spreading in every direction along the foundations.
Tribulation Qi happened to counter Demonic Qi. Moreover, the Tribulation Extinction Divine Spear was a Creation Divine Artifact, and the power of its Tribulation Qi was exceedingly mighty. Therefore, wherever