C725 Magma
If the Heavenly Devil Sect's ultimate aim is to claim the devil's treasure and ascend to Emperor through unconventional means, then the Longevity Sect is facing an existential threat. The entire sect could be devastated by irreversible calamities.
"It's highly likely that the Heavenly Devil Sect's disciples have come here for the Emperor-making treasure," Lee Xianhe speculated