Yin Mountain Range.
The mountain range stretches far and wide, with undulating terrain. From a high vantage point, one can see perilous peaks intertwining intricately.
Precisely because of this rugged terrain, conquering the range is difficult, and the cost outweighs the potential gain.
As a result, demons from Yin Mountain often descend to harass the villagers. The Taoist temples at the foot of the mountain mostly conduct occasional sweeps of nearby areas but rarely venture deep into the core.
Except for the battle against the Blood Prison Ghost Mansion last time.
It was believed that the demon problem had been eradicated in that battle, but unexpectedly, nothing changed.
The Great Demons rarely appeared, but Small Demon trouble was unceasing.
This place inherently harbors soil suitable for demonic breeding, making complete eradication truly challenging.
Even sending people for long-term suppression would incur enormous costs.