What is the secret realm?

Shui Xin is not in vain in Qifeng Mountain, and she has read many common-sense books. And the so-called secret realm can probably be regarded as common sense in the world of cultivating immortals. According to what the book says (plus her own understanding) -

During the ancient demon war, there was a crazy invasion of demons in the front, and there were all kinds of monsters making trouble in the back.

In order to ensure that the harmonious rear and the thriving growth of the younger generations go hand in hand, the major immortal cultivation worlds have almost made the same decision - to build a copy!

No, it's a secret realm.

Circle all kinds of large and small semi-independent spaces, put in all kinds of Taoist inheritances, elixirs, spiritual herbs, and rare treasures, and then catch all kinds of monsters and stuff them in, or ban and protect those things in front, or purely stocking them as random monsters and random bosses.

The secret realms built in this way are of different sizes, different levels of difficulty, and of course, different drops, suitable for monks at different stages.

At the same time, in order to ensure the sustainable development of the secret realm, the opening of the secret realm is always regular. It was only a few years or even decades before it was opened for a while. The closure period is much longer than the opening time, and when it is open, there are also restrictions on the number of people and the level of entry ......

In this way, even if those rare treasures are swept away, they can still ensure the reproduction of demon beasts and the growth of spirit grass in the secret realm. Let the secret realm always have its value.

However, even if the predecessors thought it through, they had no choice but to change the upper realm of the floating moon realm to the lower realm, the spirit