The Giant Beast Cave is so immense that each layer is like a separate kingdom, even a small world.
However...
Deep within is a forbidden zone for humans, solely because it belongs to the realm of the Fierce Beasts, a world of Fierce Beasts. The third layer of the Giant Beast Cave contains vast cultivation resources enough to birth Grandmaster Level Fierce Beasts.
As for below the fifth layer, Grandmaster Level Fierce Beasts are as common as carps crossing a river, and Great Grandmaster Level Beasts, while not everywhere, are not uncommon.
And each time a Great Grandmaster Level Fierce Beast dies,
its flesh and blood are not wasted in the slightest.
The scent of fresh blood quickly attracts other Fierce Beasts, and the pure Qi and Blood and Spiritual Qi contained within the flesh become nutrients for other Fierce Beasts to grow stronger, even to break through to the Great Grandmaster Realm.
