"Kakakaka..."

"Crack!"

[Master Key (Orange)] successfully opened this block.

It's just that after unlocking, it didn't pop open immediately.

Because the metal cover has corroded, hundreds of years of erosion and the rolling of the stone walls have caused the cover to become stuck at the entrance of the tunnel.

This is not a problem for the two clones.

As long as the unlocking is successful, the subsequent use of brute force will not cause damage to the foundation of the castle.

So he sneaked into the underground secret room without anyone noticing.

Zong Shen controlled the two clones to take out a long white sword from the storage jewelry, inserted it along the gap, and then pried it up from the diagonal direction.

When both swords were bent and damaged, the rusty cover was opened.

In order to make the plan go smoothly, Zong Shen equipped both clones with storage jewelry, which contained many magic items that might be used, as well as some low-level equipment and spell scrolls.

This prevents the clone from being helpless when encountering problems.

Facts have proven that this is wise.

In the case where force cannot be used at will, the advantages of the clone are actually not many.

After all, this is an infiltration operation, not a violent raid.

Of course, when properly prepared, the clone controlled by Zong Shen himself is as convenient as his own body!

After opening the tunnel cover, a dark and eerie ladder entrance was revealed below.

The metal ladder made of bronze is embedded in the wall. As a magical metal of not too low grade, bronze is not afraid of the erosion of time and does not show any traces of rust.

Zong Shen switched his mind and controlled the clone No. 1 to crawl in first along the passage.

Clone No. 2 was left standing guard in the bathroom.

The narrow underground passage is not suitable for pressing two clones together.

Let Clone No. 1 go down and see the specific situation first, and then decide what to do next.

…

We went vertically down the ladder for about twenty or thirty meters.

This height is equivalent to seven or eight floors.

The passage is completely vertical, with a diameter of about two meters. It is relatively spacious for a single person to pass up and down the ladder.

With the help of his clone's perception, Zong Shen smelled the smell of dust in the air.

Hundreds of years ago, this place was not only a passage, but also a ventilation shaft.

The head of the Lancaster family at that time opened up several rooms including this room into a library.

This passage is placed here to facilitate the passage of the owner.

Later, the castle was renovated, and the place was closed and divided into multiple guest rooms.

In the Endless Continent, many castles in ancient cities have a long history.

Each generation of family heads or ruling nobles would renovate and decorate the castle according to their own wishes.

There are many places like this abandoned passage in the castle.

Unless it is completely demolished and rebuilt, these traces of history cannot be concealed.

The turbid air proves that the channel is relatively closed.

It's just that because the cover is opened, air can flow in and normal breathing can be maintained.

Then there is a high probability that the other end of the channel has also been blocked.

The strategy module's golden circle marker navigation is still functional.

Among the targets locked by the golden circle, looking at the location, the core of the magic circle should be located underground in the center of the castle.

The corresponding location of this passage is in the southeast direction of the castle.

The entire underground space of the castle has long been completely hollowed out.

The solid foundation extends to more than a hundred meters underground.

On this basis, several levels of underground spaces and secret rooms were built.

A thick foundation can not only be used to build secret rooms, but also ensure the stability of the building, greatly improving the overall solidity of the castle and ensuring that it is difficult for enemies to invade from underground.

In other words, if the Marquis Castle is completely raised from the ground.

Then you can find that the entire castle is like a building built on a huge square foundation stone.

Like an incongruous piece of cast iron sculpture.

The main body is less than half the size of the base!

Yes, the castle built a foundation that was far larger than the main body on the ground.

This construction method is expensive and is also known as a solid castle.

The cost of building a fortified castle can be used to build three ordinary castles.

But the advantages are also very prominent. In addition to being able to build underground chambers in the foundation to prevent enemies from invading from underground, the most notable feature is the extremely high building solidity value.

The building solidity value of Endless Continent is integrated.

The upper limit of the sturdiness value will be determined based on the scale and level of the building.

A solid-ground castle with a foundation buried underground that exceeds the main body.

This will greatly increase the upper limit of the building's sturdiness, and since the foundation, which accounts for most of the volume, is hidden deep underground, the probability of being attacked is low, and the main attack area is still the main body of the castle.

Once you enter and exit in this way, the castle is equivalent to having the solidity value of a very large building, but with less attack surface, making it increasingly difficult for the enemy to break through.

For the Marquis Castle, the real core area is underground!

Because of this, the entire underground space of the castle has been built by members of the Lancaster family over the years and turned into a complex underground maze.

No wonder the core of the magic circle that protects the castle is placed there.

Because no matter from any perspective, it is indeed the safest place in the castle.

It is not easy to attack and destroy by force. Only by sneaking alone can you have a chance.

And even if you use infiltration tactics, you will still face a lot of troubles.

The complex underground space is a real labyrinth. It has been modified so many times by the ancestors of the Lancaster family. Even Marquis Henry himself would not dare to walk around in it.

If outsiders rush into the underground maze without guidance, they will most likely get lost in it.

Zong also relied on the strategy module to dare to go underground unscrupulously.

This was all information he had learned through strategy tips beforehand.

After going down the ladder for about thirty meters, Clone No. 1 finally reached the first underground floor!

The exit structure at the end of the passage resembles a fireplace chimney.

As expected, it was blocked with stone masonry materials.

The clone held the [Prophet's Eye of Vision (orange)] tightly and activated clairvoyance, and found that it was unable to see through the blocked wall.

This shows that the thickness of the closed stone wall exceeds fifty centimeters.

After using the strategy module to confirm that no one is staying on the other side of the wall.

Zong Shen controlled Clone One and took out the hammer, chisel, and [Silent Aragonite] again.

This kind of back-built wall can be excavated at will without worrying about disturbing the people in the castle.

It only took two or three minutes for Clone No. 1 to dig out a hole that could be passed by one person and collect all the stone fragments along with it.

This temporarily closed stone wall is more than one meter thick, and no corners were skimped at all.

After breaking through the exit of the passage, the clone came to a quiet corridor in the southeast of the castle underground.

Torch racks were placed on the walls on both sides of the walkway, and every ten meters or so, there was a magic lighting lamp made of white crystal stone.

The air is not fresh, but it smells much better than in the descending passage.

The clone looked around and quickly selected a direction under the guidance of the guide and navigation!

The core of the magic circle is located on the third underground floor.

Zong Shen must find a way for the clone to find hidden descending passages everywhere, bypass the high-level detection magic deployed at key nodes and the elite soldiers guarding here, and successfully reach the core secret room.

In such a huge underground space, there are many warehouses storing a large amount of food and armaments.

There are also safe houses for emergency evacuation.

Even the treasure trove of the Lancastrian family is housed here.

Therefore, there are many sensitive areas, and high-level detection magic is basically deployed.
To be continued...