Drinking black tea calmly at Hogwarts

A total of seven secret passages leading to Hogsmeade were drawn on the Marauder's Map seized by Zhang Xu with various excuses.

According to what the Weasley twins said back then, Filch knew four of them, and the twin brothers knew the other three, including the one that collapsed a few years ago.

And this time the sneak attack of the Death Eaters took the one that was blocked due to the collapse.

In the map in Dumbledore's hand, there are four other paths leading to the depths of the dense forest, and one secret path leading directly to the bottom of the lake.

Considering the period in which Hogwarts Castle was built, it is not surprising that there are so many escape routes.

Dumbledore estimated that the map passed down from generation to generation in the headmaster's hand did not include all the secret passages.

On the map provided by Dumbledore, only one secret road leading to the Forbidden Forest is usable, and the rest collapsed.

The inside of the secret passage leading to the bottom of the lake is fine, but the exit above the bottom of the lake was blocked with stones by unsuspecting murlocs.

Similarly, among the four secret passages known to Filch of Hogsmeade, three have collapsed in the past few years, leaving only one usable.

In other words, Zhang Xu needs to set traps in the three tunnels leading to the Forbidden Forest and the four tunnels leading to Hogsmeade.

After Zhang Xu explained the design ideas and principles of his trap to Dumbledore, Dumbledore immediately approved his plan.

It's just that Zhang Xu has limited materials at hand, and he can only set up a trap for one secret passage today, so Dumbledore asked him to set a trap in the secret passage used by the Death Eaters last night, in case the Death Eaters used it again. secret road.

After coming out of the principal's office, it was already time for dinner. Zhang Xu, who was already hungry, walked towards the cafeteria.

Today is the last day of the Christmas holiday. Hogwarts students have all returned to school. Everyone is discussing the harvest of the holiday in the cafeteria while waiting for dinner to start.

However, the surprise attack on Hogwarts last night quickly spread from Peeves to the students.

This incident quickly caused an uproar among the students. Coupled with the news of Azkaban's prison escape in the Daily Prophet today, various rumors began to spread among the students.

Zhang Xu found Fred and George who were chatting with the students at the table of the dean of the lion, and gave them a piece of parchment, and said, "At 10 minutes to eight o'clock tonight, take the This one goes to Filch's office."

Then, ignoring the bewildered twin brothers, they went straight back to the long table in the Eagle Court for dinner.

Fred and George arrived at Filch's office on time, and after reading Zhang Xu's note, Filch handed them both a huge toolbox.

After taking a box of tools and materials for filling holes in the wall from Filch, the twins followed Filch's instructions to the mirror on the fifth floor.

At this time, Zhang Xu and Peeves were already waiting here.

Zhang Xu beckoned the twin brothers to follow, and then led the two of them and Peeves into the secret passage behind the mirror on the fifth floor.

The reason why I brought Fred and George to help today is because they are very familiar with the various secret passages, and on the other hand, it is to remind them, so that the Death Eaters don’t kill them when the time comes, but take the two of them to death. A person who likes to drill secret passages was pitted to death.

It is not an exaggeration to describe the secret passage of Hogwarts with nine turns and eighteen turns. After walking an unknown number of ways and going down a few stairs in the secret passage, Zhang Xu and Peeves finally came to the collapsed place .

Along the way, Zhang Xu told the twin brothers what happened last night, but concealed the fact that the Death Eaters were led by Snape.

Fred and George were both taken aback when they learned that the Death Eaters had infiltrated Hogwarts with the aid of a mouse biscuit they had invented.

"The deformed biscuits you sell in the future can be shortened to less than one minute." Zhang Xu said to the two of them.

At this time they had already reached the obstacle, Zhang Xu pointed to the half-collapsed hole and said: "If their transformation time is less than 1 minute, maybe they will be killed

Stuck in the hole. "

The secret passages at Hogwarts are all built of stones, which are relatively strong, but they haven't been maintained for hundreds of years, and collapse in some places is inevitable.

At the collapse site in front of me, the stone slab at the top of the secret passage was pressed down by a huge rock and soil.

A huge rock was undetected just above the tunnel, which is very dangerous in tunnel construction.Because the boulders in the soil are invisible, when the soil under the boulders is hollowed out, the boulders can easily collapse the tunnel under the action of gravity.Such a case can fill a history of blood and tears in tunnel construction.

Now it seems that magic was used in the construction process of the secret passage at that time, which made the huge stone collapse the secret passage hundreds of years later.

Zhang Xu observed for a while the entrance of the hole that the Death Eaters drilled in, and found that this side of the boulder was slanted, and the top was covered with mud. The second half of the hole was made of stones, and the front half was made of mud.

The section of soil after the Death Eaters drilled in had already collapsed quite a bit.

Zhang Xu poked the surrounding soil a few times with his magic wand, making it look like the soil collapsed naturally and blocked the hole.

After all, Shenfeng Wuying can only drill holes, and cannot strengthen the walls of the cave.

Zhang Xu looked around again, and found that the collapsed boulders and soil had tightly blocked the secret passage.

After inspecting the scene, Zhang Xu began to arrange tasks.

"Peves, look for all the vents from here to the last corner."

"Fred, George, after you find the air outlets in Peeves, seal them all up, preferably so that no traces can be seen in the secret passage."

The twin brothers had no objection, and followed Zhang Xu's instructions and began to block the vent with Peeves.

The air vents in the secret passage are very hidden, but with Peeves who cameo as the soil traveler's grandson, they will soon be able to find the air vents through the air ducts in the dirt.

After Zhang Xu walked to the back of the first corner and chose a place, he drilled a wrist-thick hole in the stone slab on the top of the secret road, then turned into a herringbone ladder, climbed up and stuffed a piece of C4 into the hole. , and then inserted the detonator and fuse.

Zhang Xu took out a gas tank from his treasure bag and put it there where he estimated that the new collapse in the secret passage would not affect it.

Wait until all the vents are blocked, and then blow up this secret passage, and this section of the secret passage will form a closed space. This tank of gas just replaced on New Year's Day is enough to turn this place into a gas chamber.

The unpleasant smell accumulated in the secret passage for hundreds of years should make the Death Eaters ignore the unpleasant smell of ethanethiol in the gas.

It's just that for a while later, when I'm too lazy to go to the kitchen, I can't cook and eat secretly in the dormitory.

According to the working regulations of the house elves, it is okay for them to send food to the professor's office and professor's dormitory, but not to the public dormitory.

A trap is that the simpler the better, simplicity sometimes means fewer flaws, and fewer flaws means that it is difficult to be discovered.

It would be nice if the Death Eaters had another cigarette to calm down.

After the twins and Peeves sealed all the vents, Zhang Xu lit the long fuse, and then led everyone to run vigorously.

After a loud "boom", the shock wave was rampant in the secret passage. Fortunately, Zhang Xu added a shield to everyone, so apart from being shocked by the loud sound, everyone was fine.

After the dust settled, Zhang Xu and the others returned to the explosion site, and found that this secret passage had been blown down, and mud and stones had blocked this section of the secret passage.

After checking that there were no gaps that would cause gas leaks, Zhang Xu let Peeves pass through the obstacle and unscrewed the valve of the gas tank opposite.

After Peeves came back, Zhang Xu left the secret passage with them.

Zhang Xu reckoned that he would have to purchase many bottles of carbon monoxide in the Muggle world. After all, the bottles could not be brought out with this method, and the odorless carbon monoxide was more hidden than the gas with ethanethiol added.