As it approached dark, there was a fog, a typical alpine climate in the Rocky Mountains, with a large temperature difference between day and night. The fog shrouded in fog, the outlines of the mountains began to blur, the intermittent curves had a special charm, and the city loomed like a mirage.

If you want to say that the biggest impression of the falling city is undoubtedly solid, or to put it modestly - indestructible. The tall and upright mountains are simply the magic of nature, the magnificent city, the great perseverance shown by human beings, the fusion of nature and artificiality, to create an incredible magic.

On both sides of the pass is the thrilling cliffs, undoubtedly the largest natural barrier in the city, the tight outer wall, the thickness of 20 meters, up to the stairs, divided into three layers, from the bottom to the top in order for the heavy armor soldiers, the archer platform, the heavy catapult.

Between the inner wall and the outer wall, there are two iron anti-infantry cones, the thick iron cone with a bowl mouth is two meters high, deeply inserted into the ground, connected to an iron plate that has been buried in the ground for hundreds of meters in advance, and the interface is poured with molten iron. The iron cones are so tightly connected that an adult simply cannot pass through the gap. At the critical moment, you only need to lift the wooden board covering the top for people and horses to pass, connect the iron cone on the side, pour molten iron into the trench, and cool it in a short time with the contact space between the iron pipe and the iron cone.

Behind the two city walls, there are large and small stone buildings, so the city is also vividly called the stone city.

As soon as Yun Feng and his party arrived in the city, they felt a strong military atmosphere, only to see the patrol team coming and going, and the guards were even more strict about the business trips of the people who went out of the city and entered the city. Yunfeng had been keeping an eye out for the caravan of tourists dressed in big hats, and found that they had not been hindered in any way as they entered the city.

In front of a large mansion, two guards stand like stone sculptures, raising suspicions that they are still alive, but only if you don't see their razor-sharp eyes. They stared firmly ahead, not exuding any harsh gaze, but giving the people who came and went a sense of solid security.

Yun Feng stopped in front of the main entrance, looked at the closed lobby, and the thoughts that had been suppressed in his heart couldn't help but begin to pour out. He thought that he could calmly face everything that was coming, at least not to be broken through the gap by his thoughts now, but when his long-lost relatives were close at hand, he still couldn't be calm.

Yun Feng was dressed in tatters and cold, like a wild man coming out of the mountains, and the two guards naturally set their eyes on him. However, after three years, his body shape and appearance have changed a lot, and it is difficult for people to associate him with the once weak son.

After only a moment's pause, Yunfeng moved away, and at the same time, he could feel the two guards behind him withdraw their defensive gaze.

"I used to think that my house was heavily guarded, and it was almost impossible to infiltrate. I didn't expect that the person who was going to infiltrate now was actually me. A tall building, Yun Feng looked at the airtight mansion and smiled helplessly.

Although the size and appearance have changed, and no one should be recognizable when concealed, but such a mysterious visitor will inevitably attract attention and make people suspicious, and if someone pursues it in the future, I am afraid that it will leave clues. Therefore, Yunfeng is willing to take the risk of sneaking in, but also strive to be untraceable.

For the defense of the General's Mansion, Yun Feng is no longer familiar with it, although it will be adjusted accordingly according to the terrain of the fallen city and the difference between the city government, but in general, there should not be much change.

After selecting several locations from different angles for detailed investigation, Yun Feng took out a pen and paper from his book bag, and in less than a cup of tea, a defense map that was clear at a glance was drawn. He also had a rough idea of the time of the guard's change of guards, but if he wanted to be accurate, he had to squat for at least one night to record.

Yun Feng didn't want to spend time on this, and after putting the drawings on the table into his book bag, he blew on the candles and sent the room into darkness.

The fog still did not disperse, and the clouds were so thick that they hid the moon and saw only a thin white outline. The torches lit and darkened, dragging the figures for a long time, and the Night Watch's neat footsteps were still drowned out by the silence of the night.

"......Huh" A wind blew, torches rattled, and the two guards on duty under the wall glanced at each other, but neither of them found anything unusual in each other's eyes.

And Yun Feng, who was dressed in night clothes, had already hidden on the top of the corridor. Without any borrowing points, Yunfeng completely relied on the strength of his hands and feet to support the rafters, like a creeping bat.

The structure of the mansion was the same as what he had observed before, although the area was not small, but there were only two lobbies and more than a dozen side rooms. Entering from the main gate, it is a hall, which connects the two courtyards, divides the mansion into two parts, and opens a moon gate on the left and right sides, both guarded by guards. Daily handling of military affairs and sand table deduction are all in one place.

The second hall is behind the first hall, which is the inner bed of the general and his wife, and on both sides is the wing room where the maid lives. Generally speaking, the supreme commander who defends the city during war readiness is not allowed to leave the general's palace during normal times, except for battlefield training and patrolling the city defense, and only in wartime will he move to the city tower to personally direct the battle. In the case of a large city, a central tower will be built behind the city walls, and the lord will look far and far.

At this time, it was the preparation period, and Yun Feng expected that his parents should go to bed in the second hall.

Another group of guards patrolled under the corridor, their vigilant eyes scanning every scene in the courtyard, but they did not find the figure hidden above the roof of the corridor.

Yun Feng controlled his breathing and firmly pressed against the rafters, and the light of the fire in the hands of the patrol guards already faintly reflected his figure. If anyone had paid attention to the roof of the porch, he would have found him. At this time, the corridor was still more than ten meters away from the second hall, and several guards patrolled non-stop, leaving no defensive gaps.

But what made Yun Feng really jealous was the golden feather owl in the sky. The two owls take turns patrolling at night, keeping a close eye on any uninvited guests, and if they want to escape under their noses, they must not be exposed to cover. Once they find it, they will immediately lock their location, and even if they can escape from the General's Mansion, it will be difficult to get rid of their tracking.

And if they are shot, they will be spotted by the guards who are in charge of guarding them as soon as possible.

Therefore, the first thing that Yunfeng wants to remove is the threat from the air.

"Do you think it's easy for me to go home? Yun Feng muttered in his heart. When the patrol guard left, he kicked on his toes, grabbed the flying rafters with both hands and took them into the air, and the pedal column jumped behind a bonsai.

"Little one, it's up to you next. Yun Feng took out a cloth bag from his book bag, and when he untied it, it turned out to be a little mouse with his limbs tied, struggling constantly, but he couldn't escape from his palm.

Then Yun Feng carefully took out a packet of white powder from his bosom, added a few small pieces of flint to it, tied it tightly, and tied it to the rat's tail. This seemingly simple process took Yun Feng a while, and two patrol teams interrupted his operation on the way.

After completing all this, Yun Feng untied the string tied to the limbs of the mouse, slowly let go of his hand, and said to the mouse, "Run." ”

The mouse regained its freedom and fled, the paper bag on its tail shaking violently as it was dragged by its swift body.

And Yunfeng is like a full bow at this time, his hands are propped up on the ground, his right leg is slightly bent, and his trouser leg is arched by the swollen muscles, like a wild cat ready to attack!

"Three, two, one!"

Yun Feng silently counted the time, and when the word "one" sounded, the power of his right leg was released, shattering all the trouser legs, like a ghost in the night, flashing by.

At the same time, the golden-feathered owl hovering above the mansion was closely watching the wind and grass below, its deep pupils like the eyes of the night, and it knew everything that was happening in the darkness.

Suddenly, a mouse rushed out of the flower garden, with the arrogant posture of the golden feather owl, naturally it will not lean over to hunt, in fact, its food is better than that of ordinary soldiers on weekdays, and there is never a shortage of chicken, duck and fish. It was just a playful look at how the humble mouse escaped.

"Whew!"

However, just as the golden feather owl locked its gaze on the mouse, a dazzling white light rushed into its pupils without warning, and the dazzling light was like a scorching sun, instantly making it dizzy and completely blind!

The golden-feathered owl shook its head vigorously, blinked its big bulging eyes, and finally gradually regained its eyesight, and immediately scanned the mansion again, but found nothing abnormal, and the mouse was completely lost. It was full of suspicion, but it couldn't do anything about it.

There was a strong wind in the courtyard for no reason, and the leaves were flying, and the two soldiers stationed by the moon gate couldn't open their eyes for a while, only to feel that the wind blew into their armor, penetrated their skin, and made people shiver.

"Everything went as planned. On the other side of the Moon Gate, Yun Feng turned his back to the two guards and let out a long sigh of relief, his chest gradually calming down. Although it was only a sprint in the blink of an eye, the physical energy required to build up and explode with all your strength was self-evident.

In a dirty hole, a mouse is licking its scorched tail. The reason why Yun Feng was able to sneak into the second hall silently was because of the paper bag tied to the rat's tail.

The white powder in the paper bag is actually a natural ore commonly used by Tsukihime in the twilight forest to refine medicine for Yunfeng, called rhombic ore, which can be burned when exposed to open flames. If it is ground into powder, the combustion will be more vigorous and will produce a burning white light.

Rhombic ore was first used in refining, but because of its scarcity, it was usually only purchased by refining masters at a high price.

Yunfeng first grinded the rhombic ore into powder, added fine flint to it, and in the process of the mice escaping quickly, the flint in the paper bag rubbed violently to produce sparks, igniting the rhombic powder, which burned instantly in a narrow and sealed space!

The paper bag is very small, and the light released can only be seen in a certain space, and the burning time is extremely short, and the spaciousness of the courtyard is extremely difficult for the human eye to detect if you do not stare at the location of the mouse in advance.

But that's enough for the golden-feathered owl. Its eyesight is a hundred times stronger than that of humans, and the dazzling white light is naturally magnified by the same multiple, and at this time it is at night, the visual contrast is even stronger. The moment it lost its sight, it was the only time for Yunfeng to break through the defense.

"There's only one last guard left!" According to the distinction between dignity and inferiority, it is not difficult for Yun Feng to guess the location of his parents' bedroom, but how to bypass the guards around the room and sneak into it without knowing it is a tricky problem.

"Madam, it's not too early, rest early. A maid took the basin and slammed the door into the door.

The moment she came out of the wing, Yun Feng's eyes lit up, and his eyes followed her closely, because he recognized that this was his mother's maid Qing'er, and he must be cleaning his mother's face with the basin at this time.

Sure enough, when Qing'er entered the bedroom, Yun Feng saw the familiar figure through the door. Jumping up from the weakly defended side of the wing, Yunfeng rushed all the way along the main ridge of the house, squatting down the vertical ridge, and jumping with the help of the eaves, like a squatting beast, flying below several guards and finally landing on the wing corners of the main house.

The soles of Yunfeng's feet seem to have meat pads like felines, agile and silent. He somersaulted back, grabbed the rafters, and crawled down the rafters like a gecko to the top of the door. Looking down, the spears in the hands of the guards under the eaves pierced into the sky, and the spear heads flashed with sharp cold light against the background of the lanterns.

"Qing'er, I'll just clean up the futon myself, you go back and rest. Su Rou put the towel back on the edge of the basin and said to Qing'er, who was making the bed. The wind and sand of the Rocky Mountains did not erode her face.

"Good night, ma'am. Qing'er did not follow her master's instructions, but continued to lay out the bedding, and then took the basin and exited the room. She didn't notice, however, that some dust had spilled into the basin as she finally closed the door.

Su Rou bolted the door, but when she turned around, she was shocked to find a figure falling from the house, and before she could call for help, she was covered by the other party.

Yunfeng pulled down his veil and shouted, "Mother, it's me." ”