Silence settled over the summit once more as Lin Mu slowly looked toward the endless darkness stretching beyond the cave entrances. His original impression of the Mad Demon Depths had completely vanished.
This underground world extended far beyond a simple prison.
Someone had deliberately divided it into zones and entire ecosystems existed beneath the surface. Communities had emerged over centuries as prisoners established territories and Families endured across generations.
The Heavenly Stream Guardian Sect occasionally entered deeper regions. Yet even the oldest surviving prisoner knew almost nothing beyond the Second Zone.
That realization made one thing abundantly clear.
Everything Lin Mu had explored so far barely scratched the surface of the Mad Demon Depths.
