The castle of the Revno family, which is said to have taken 300 years to build, appeared at the end of the field of vision.
More than a dozen towering towers and eight palace-like four- to five-story main buildings, each at least 50 meters long, are scattered on the steep hillside. The black stone looks unusually dark in the sun.
The castle is located in a deserted wilderness with no roads, no entrances, and only high walls. The vampires fly, so there is no need for doors. As for the low-level vampires who cannot fly, they are lifelong slaves in the castle and do not need to go out.
The entire castle is silent. The vampires cannot see the sun during the day, so the Constitutional Army arranges firepower in an orderly manner.
Half an hour later, roars sounded above the castle.
In the mountain behind the castle, all the vampires have hidden in the cave. The cave is 30 meters high, and the interior is covered with stone slabs like a palace. The top of the cave is hung upside down with dense castle bats.
Next to the ancient golden coffin, Hera asked the same question as the Red Wolf King: "Did Quint not give us a warning in advance?"
The answer was still the same, no.
"It's okay. If we can build one castle, we can build the second and third castles. Now I have more blood servants and more wealth."
The wealth of the Revno family in Fabro City was destroyed overnight, and the castle seemed to be lost. However, the bright prospects did not discourage them at all. As long as they firmly controlled the wilderness trade, sold the things in the wilderness to the God-chosen Kingdom, and sold the products of the God-chosen Kingdom to the wilderness, they were not afraid of the loss in front of them.
As the roar became more and more violent, and as the vibrations got closer and closer, many vampires looked more and more uneasy.
On the ground, sections of the city walls were blown down, towers were blown down, and palaces were blown to pieces. Stones mixed with broken glass splashed everywhere, and the Constitutional Army was looking for the caves of the vampires during the bombing. It was no secret that the vampire castles had caves or underground caves. Most of the castles were built on the mountains, so that they could provide them with a retreat and avoid being found during the day.
The blood clan mainly relies on crazy revenge afterwards to ensure that no one dares to cause trouble to the castle during the day, but unfortunately the Constitutional Army is not afraid of the blood clan's revenge.
The entrance to the cave will be built very solidly and can withstand most attacks.
"Colonel! We found several suspected cave entrances!"
In the ruins of several palaces, the soldiers found suspected cave entrances. Only one of these entrances is real, and the others may be disguised.
"The cowardly blood clan always takes hundreds of years to build huge fortifications, which are so huge that they are a headache."
Claude asked doubtfully: "Do we need to blow them up one by one?"
"This is the only way..."
There are a total of 6 entrances, and I don't know which one is the real one, or they may all be fake.
Just when Colonel Guyton was about to give the order, Rudolph suddenly said, "I have a simple method. How about I try it while the bombs are going on?"
Claude was surprised at first, and then he chimed in, "Let Rudolph try it. My special assistant is very smart."
Colonel Guyton nodded, "Then you try it. It may save time, but can you tell me how you plan to do it?"
Rudolph said,
"The vampires have hollowed out a part of the mountain, which will cause a cavity to appear inside the mountain. The overall density will suddenly drop at a certain place. The larger the cavity, the lower the density. Gravity will become smaller in places with low density. If you can make a very sensitive spring, you can use gravity to measure where the cavity in the mountain is.
This kind of exploration is called gravity exploration. Let Director Claude help me make a spring. He is an alchemist and should be able to do it quickly."
Guyton nodded, "Wizards have many ways, so let's try it."
Rudolph's scalp went numb, and the wind around him became much colder in an instant. He almost fell off the railing of the airship.
Claude smiled and patted Rudolph on the shoulder: "Colonel, let's try it now. Trust my assistant, there will be results soon." Claude pulled Rudolph away from here. When they were in a place with few people, Claude whispered:
"Don't scare yourself. There are also obedient wizards in the Constitutional Army. Who doesn't need magic tools? Maybe Colonel Gayton himself has a wizard who often cooperates with him."
Rudolph swallowed his saliva: "Just now I thought I was going to die. I was exposed by a level 5 alchemist. I want to know how he found out?"
"When you rescued the Dordo District, we were all watching on the airship. He could tell at a glance that it was the method of the Scorpio wizard. There is nothing to be surprised about."
Claude is a level 3 alchemist. He found some springs in the airship's spare parts warehouse, and then according to Rudolph, he made these springs very sensitive.
Soon, a simple metal spring gravimeter was made.
An officer took them on the boat and flew over the mountain.
There was no change on the entire castle, but when they tried to go around the back of the mountain, they found that the spring gravimeter had changed significantly.
The officer on the boat fired a signal flare, and the Constitutional Army airships left two to continue bombing in the front, and the rest flew to the location of the boat.
Rudolf and his men came to the main ship Silver Flame again.
"Are you sure it's here?"
Facing Colonel Gayton's doubts, Rudolf explained the principle again, and then said: "Alchemists believe in truth, and there is an accurate logic between cause and effect. I am sure this is the location of the vampire cave." Colonel
Gayton thought for a while and said:
"It seems that the vampires have penetrated the mountain, passed through a long passage, and built a cave on the back of the mountain.
Then concentrate the gunpowder and blow up their cave here."
The soldiers were busy again, and Rudolf was very confident that this was definitely the real nest of the vampires.
Claude said at the side: "Rudolf, I taught you this method, right? You have a great memory. I have forgotten it, but you still remember it."
Rudolf turned his head in confusion: "Yes... did you teach me?"
"Why is your memory so bad?"
Rudolf was a little confused. He didn't know why Claude said that he taught him. Claude was not the kind of person who would take credit for other people's work. He nodded and agreed: "I'm sure you taught me, Director Claude. I can find evidence. I took notes at that time."
Colonel Guyton smiled and shook his head:
"Rudolf, alchemists need to use advanced laboratories to be promoted. The application for laboratory use qualifications mainly depends on the quality of published papers. This spring gravimeter is enough for Claude to publish a good paper, so he spoke up.
This paper may not be important to you, but it is very important to Claude. Alchemists are getting stronger and stronger in this research." Rudolf
finally understood the reason: "Director Claude, next time just say it directly, there is no need to beat around the bush."
"Next time if you have something good, can you give it to me directly, without beating around the bush?"
"Got it. No problem."