How to brush the safest underground city?

1/6 Peace can be obtained through the tomb of the soul.

2/6 method: After logging in the game, you need to go to Death Valley and enter the tomb of the soul.

3/6 the tomb of the soul needs to reach the full level to enter.

4/6 after entering the picture, you need to destroy the monster according to the tips of the small picture.

5/6 of the materials obtained are peaceful, so you can go to a fortune teller to exchange items.

6/6 can also be exchanged for weapons and illusion items.