The Fierce Ghost Sect was destroyed overnight, with most traces obliterated and the valuable treasures within the sect looted. The only thing that remained relatively intact was the Book Collection Pavilion, which housed various cultivation techniques.
The Demon Suppression Army had the intention of collecting the variety of martial arts and cultivation techniques in addition to eradicating unstable elements of the human race when exterminating the Hundred Sects.
Although no other resources were seized this time, the harvest could still be considered fruitful.
Lu Yun also checked the Fierce Ghost Sect's cultivation techniques. There were only two that could be practiced to reach the Rune Seed Realm - the Ten Thousand Ghost Scripture and the Earth-dark Mind Scripture.
Both of these techniques were incompatible with the Pure Yang Martial Arts Canon, so Lu Yun didn't collect them. Instead, he ordered Qing Hou to place them in the Treasure Hall of the 18th battleship.