The points cannot be exchanged, but they can be taken out of the world, which is also a good thing. Lu Feng took all of them and asked the king of dwarves.

"Is there a secret door or something?"

"How is it possible, our dwarves' treasuries are all sealed, and there is only one entrance and exit." The dwarf king replied.

Lu Feng tapped on the wall. It was thick and not hollow, but he knew that the opposite was another cave, which did not belong to Stone City.

After Stone City was looted, in addition to the gate part of the treasure house was blasted open, this corner was also blasted open.

The alchemy explosives in the treasury were very effective, but there were only five in number. It was impossible to blow up this wall with such a small amount, and Lu Feng was reluctant to use it if he could bring out the world. Fortunately, the dwarves did not lack explosives.

The dwarf king was confused and annoyed by Lu Feng's request to bomb this rock face, but being held hostage and his life in Lu Feng's hands, the dwarf king could not refuse Lu Feng's request.

So, after a while, a large pile of alchemy explosives was brought, and Lu Feng directed the dwarf king to let the dwarves operate.

In the blasting of underground rock walls, dwarves are experts, and Lu Feng is not involved.

Rumbling, with the huge explosion, the rock wall on the side of the treasure house collapsed, and a huge hole appeared, but it was not blown through.

Lu Feng instructed the dwarves to continue bombing, but this time the dwarf king refused.

"We can't continue the bombing, the whole place will collapse, and it will probably spread to other areas." The dwarf king was not only angry, but also heartbroken. The explosion just now caused many treasures in the treasure house to be buried by rocks.

Lu Feng was in a hurry and refused the dwarf king's request to transfer the treasure first.

Such rough and violent treatment of rare treasures made the dwarf king cry without tears, which was collected by their royal family through the ages.

"It's okay to collapse, as long as the rock wall is blasted open."

No matter how much the landscape here has changed, Lu Feng knew that the rock wall could be blasted, because it was blasted in the original book.

"Use the high-efficiency alchemical explosives you just took. The directional penetrating power is stronger, so it won't blow away the entire rock wall structure." Seeing that the dwarf king couldn't convince Lu Feng, he could only try it. Explosives will never work."

"Okay." Lu Feng didn't think too much about it, as long as things were done, it would be worth it to lose a few alchemy explosives.

The underground world is really complicated, and he is afraid that the entire Stone City will collapse.

Moreover, he estimated that in the original book, the orcs should have also used high-efficiency alchemical explosives, indicating that this is indeed feasible.

But in the end, the dwarf only consumed three high-efficiency alchemical explosives, plus some other ordinary explosives, and finally blasted the rock wall.

The dwarves were actually more reluctant than Lu Feng to use this high-efficiency explosive. Although Lu Feng had already taken it, the dwarves' habits could not be changed, and they were very economical.

"The opposite is a cave." The curiosity of the dwarves was also attracted. Through the blasted rock wall, there was a cave outside.

Lu Feng took the dwarf king out.

Part of the cave was damaged by the explosion just now, and many rocks fell to the ground, but the tunnel in front was intact.

"Sure enough, there is a hall of fame here."

In the original book, the tunnel was completely blown up and buried, causing the cave to become an underground closed area and unable to leave the underground world.

Lu Feng only suspected that the secret of the Dark Royal Court's attack on Stone City was here, and it was also because of this.

Because this is so strange, it is impossible to say anything about deliberately blowing up the treasure house, and the only place where the treasure house can leave after it comes out.

Since those orcs have captured the entire Stone City, they can leave directly from the gate. There are no chasers to intercept, it is simple, efficient and safe, and they do not need to escape from the underground world.

Unable to find the answer in Stone City, Lu Feng knew that it was only here.

Lu Feng led the dwarf king into the tunnel. Many dwarves held torches in front of them and grabbed the dwarf king. These dwarves could only cooperate.

After more than half an hour, they arrived at another cave, which is a huge underground cave with many stalactites and complex terrain, but it is still a closed area.

The dwarves were very efficient, and they found out that the rock wall in one place was very weak and could penetrate into another cave, but Lu Feng was no longer interested in breaking through the wall to find the cave.

He found a portal in a corner, which was open and conspicuous.

A dwarf did not come out after entering, indicating that it was also a one-way portal. Lu Feng did not hesitate to enter the portal with the king of dwarves.

Many dwarf guards also entered it together, because they didn't know what was on the other side, and these guards wanted to protect the king.

The place where this one-way portal came out is also a closed cave, and there is a very conspicuous portal next to it, I don't know where it leads.

And there are a few scary scarlet patterns on the ground in front, which are naturally formed patterns, even if the ground is dug up, it will still exist.

"My God, this is the escape point of the abyss." The dwarf king exclaimed in surprise.

The abyss escape point is the location where it is easier to enter the main material plane from the abyss. Dark priests can easily build portals to the abyss at these locations, so as to summon abyss creatures to Heimris.

"The goal of the dark royal court is this escape point. I said that they attacked your Stone City. There must be a more important purpose, and it is obviously for this."

In the future, there will be many cities in the dark royal court, both on the surface and underground.

There is no doubt that this place will be occupied by the dark royal court in the future, and a headquarters will be established, which is estimated to be one of those secret underground cities.

At this time, the dwarf who entered the portal first came back.

It turns out that the portal here is also one-way, leading to the mountains outside Stone City, that is, the surface world, entering Stone City, passing through the treasure house, and entering the one-way portal, you can come back again.

The dwarf circled ~lightnovelpub.net~ and stood here again.

"Now, do you know what to do?" Lu Feng asked the dwarf king, "Bring all the explosives from your Stone City."

The abyss escape point cannot be destroyed, but the entire cave can be blown up, that is, buried. This is the only way.

Obviously, the dark royal court just used magic or ancient books to find the approximate location of this point. They knew that they could come from the Dwarf Stone City, so they attacked the Stone City.

Once this place is buried, even if the Dark Royal Court detects the specific location, it will take them more than ten years, or even decades, to dig holes and rocks.

This is not worth it at all. With this skill, it is better to find other escape points. It is easy to be discovered by human elves and other forces when working here.

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