Of course, although no Great Heavenly Demon stood guard in the valley, it was filled with mechanisms and secret treasures.
To charge in rashly would mean suffering grievous wounds.
But if they simply kept waiting, the entire Ghost Bone Sect would be mobilized.
Then it would not be the Great Heavenly Demon Palace ambushing them, but the Ghost Bone Sect ambushing the Great Heavenly Demon Palace.
The mechanisms in the valley were extremely strange, containing beast souls capable of injuring a person's soul.
The secret treasure was an enormous Filthy Soul Altar, ten times larger than the one he had shattered before.
Even with the Void-Breaking Demonic Artifact, he did not dare say for certain whether he could withstand such a massive Filthy Soul Altar.
He now understood that the four old men had been prepared to die because they were activating a secret technique, sacrificing themselves to nourish a treasure within the cave.
The treasure that gave birth to Ghost Bone Flowers—Ghost Soil.
What the Great Heavenly Demon Palace knew was that the Ghost Bone Sect had used a secret technique to cultivate Ghost Bone Flowers.
But what secret technique they had used was something the Great Heavenly Demon Palace had never managed to uncover, even after interrogating some Ghost Bone Sect disciples.
That was because this secret technique was known only to the most core upper ranks of the Ghost Bone Sect.
The most fundamental secret was Ghost Soil.
It came from beyond the heavens, wicked and powerful.
After a Ghost Seed was formed through a secret technique, the Ghost Soil could transform this body into power that nurtured the Ghost Seed, causing it to sprout and bloom.
Once the Ghost Soil made the Ghost Bone Flower bloom, it consumed an enormous amount and had to be nourished