One year later.
Azure Purity City.
Song Wen had already spent half a month in the city, threading through its streets and alleys and visiting shop after shop every day, all in search of a spiritual treasure called "living soil."
Living soil was an immortal-grade spiritual material whose primary use was cultivating spiritual herbs. It could nurture certain exceptionally rare immortal medicinal plants.
Song Wen, however, sought living soil to refine the Blood Sea Imperial Seal.
After killing Wu Liang and Mu Li, Song Wen had teleported back to the Purple Star Immortal Domain and taken stock of their storage rings.
Aside from the grand unity true water he had coveted for so long, he had also found a spiritual material called "dragon-sleep sand" in Wu Liang's storage ring.
Dragon-sleep sand, grand unity true water, and living soil were the three principal materials needed to upgrade the Blood Sea Imperial Seal into an Immortal Artifact.
Song Wen's original plan had been to head straight to Dragonspine Ridge upon returning to the Purple Star Immortal Domain and investigate matters concerning the Corpse King Blood Refinement Art.
But with two of the three principal materials needed to refine the Blood Sea Imperial Seal already in hand, he had changed his mind. He decided to upgrade the seal into an Immortal Artifact first to bolster his strength.
And Azure Purity City, a great city of the Human Race, was undoubtedly the best place to seek clues to the whereabouts of living soil.
Countless cultivators passed through it every day, bringing treasures of heaven and earth from all over, along with all manner of rumors and intelligence.
The other auxiliary spiritual materials he needed were merely common items. During his time in Azure Purity City, Song Wen had gathered most of them, spending nearly