Before making a move, Yu Changan didn't forget to remind him, because what he performed was a surprise attack from Cao Cao. The biggest feature of these special abilities is that they do not have a clear level limit like ordinary occult arts, and they will burst out with stronger combat power as Yu Chang'an's strength increases.

The surprise attack was the strongest killing move that Yu Changan had mastered before, and although he did not awaken the Qinglong Soul at the same time this time, in his opinion, it could still burst out with good lethality. Lu Bu is a yellow-level Xuanshi with himself, and even if the other party has outstanding strength, he is very likely to be injured by himself.

After all, Lu Bu is a heroic soul who has signed a soul contract with him, and if he is seriously injured by himself, it will be more than worth the loss.

This is something that Yu Changan thought of before he made a move, and at this point, he can be said to be looking ahead and thinking about it very thoroughly, and even the light drink before he made a move has played an obvious role in reminding him.

In the eyes of everyone, Yu Chang'an, who had been reminded of him, rushed out like a black line, and appeared behind Lu Bu in an instant, and a sharp blade glowing with cold light stabbed at Lu Bu's back with a vast killing intent.

If this knife is stabbed, even if Lu Bu is the reincarnation of the God of War, it will not end well.

As a result, at this moment, only a muffled sound of "dong" came, and Yu Chang'an, who was still carrying boundless killing power a moment ago, fell to the ground in a daze at this moment.

At that moment just now, in the face of Yu Changan's sudden backstab behind him, Lu Bu didn't even turn his head, he just raised and dropped his elbow very casually, and when he fell, he saw Fang Tian's halberd appear in his hand, and the halberd body knocked on the top of Yu Changan's head accurately, knocking him to the ground cleanly.

Lu Bu stepped out in one step, turned to look at Yu Chang'an who fell to the ground: "Okay, let's start." ”

Yu Changan's eyelids jumped wildly, rubbed his aching head and slowly stood up, and said with a grin: "Okay, I just warmed up, I'm going to ......."

Before he could finish his words, he rushed forward, and this time he even awakened the green dragon soul and let his combat power explode instantly. As a result, when he rushed in front of Lu Bu, he was directly blocked by the tombstone that fell from the sky.

Looking at Yu Chang'an, who was retreating one after another, Lu Bu said with a smile: "Boss, whether you can fight or not, if you play like this again, I will really do it." ”

Yu Changan stood in place and was a little at a loss, not knowing what else to do for a while. Before he started to move, he thought that Lu Bu's strength should be very strong, so he would use a killing move at the beginning, and even used the green dragon soul when he started the second time, but the two shots in a row were stopped by the other party lightly, and his heart was greatly depressed and at the same time full of doubts.

"Haha, don't make trouble, don't make trouble, you're busy. Yu Changan waved his hand awkwardly, and began to think about the details of this battle.

It stands to reason that Lu Bu has just raised his strength to the Yellow Rank realm, if Yu Changan does not have a matching combat method because of the sudden increase in strength, Lu Bu should have the same problem, but why is there such a huge gap between the two sides?

Lu Bu walked to the side with a wicked smile and sat down again, and began to take out blood and eat it violently, obviously he also had the problem of needing a lot of energy after his cultivation was improved. After eating a few bites of meat, Lu Bu put down his joke and said, "Boss, your intention is too obvious, I already feel what you're going to do before you make a move." ”

"What do you mean?" Yu Changan was interested, and immediately leaned over to Lu Bu and asked.

"You have to learn to restrain your aura, whether it's in normal times or in battle, you need to restrain your aura as much as possible, only in this way can your offensive succeed. Lu Bu said: "The battle between the strong is not simply to release powerful killing moves, but to ensure that you can hit the opponent." ”

Yu Changan nodded thoughtfully and asked, "Then how can you restrain your breath?"

"Let's start practicing the Qi Accumulation Technique, I can teach you the Qi Gathering Technique, but this is not a special ability, you need to study it slowly by yourself. As he spoke, Lu Bu took out a jade slip from the treasure bag, left a divine sense, and threw the jade slip to Yu Changan.

Yu Changan took the jade slip and put it away after a brief understanding, this time the fight with Lu Bu gave him a clearer understanding of the battle between Xuanshi, to be precise, a clearer understanding of the battle between the strong.

Lu Bu explained very clearly, and Yu Changan quickly understood the key point. Although his strength is constantly improving, there is still a problem of unstable foundation after all, and there is still a certain gap in many aspects. Fortunately, with Lu Bu and them by their side, the defects in combat methods can be quickly made up.

While he was studying the cultivation of the Qi Gathering Technique, one of the feet of the fortress suddenly collapsed. Everyone took advantage of the situation and found that the strong wall that had been built before had fallen for no reason.

Just when everyone hesitated, the city wall fell down piece by piece, and it didn't take long for the city wall that had been built with great difficulty to collapse with a bang, and the fortress that had just been built in rudimentary form was inexplicably broken.

"What's the matter, what's wrong?" looked at Zhang Jiaoyu Chang'an who came over and immediately asked.

Zhang Jiao shook his head: "I don't know, things are obviously going very well, why did these city walls fall down when they say they fell?"

Yu Changan and Zhang Jiao looked at each other, and after Lu Bu and Ao Lie came over, they also didn't know what was going on, and even Ram Shu and Guan Yu couldn't understand what was wrong.

Looking at the dead spirits who were still working tirelessly to build the city wall, Yu Changan decisively gave the order to stop, and when they got together to discuss countermeasures, the city wall that was only halfway built on the second floor also began to collapse, and it didn't take long for it to be completely shattered like the first layer of the city wall.

It was confirmed that there was no problem with the boulders taken out of the valley, and even the quality of those boulders could be said to be surprisingly good, and they could definitely be used to build the city walls. However, these immensely strong boulders collapsed soon after the walls were built, and all of them shattered as if they had been struck by a mysterious force.

"Perhaps...... Is there something missing in the city?" said the ram Shu after looking at the mess around him for a while, and then said uncertainly.

"What do you say, what's missing?" asked Yu Changan.

"I don't know the specifics, I'm just guessing. Ram Shu explained: "I remember that there are many buildings in the cities I have been to before, and those buildings seem to have some special functions, maybe when building cities, you also need those buildings with special functions, right?"

"What kind of building? can you still remember?" Yu Changan continued to ask, whether what Ram Shu said was right or not, he could only try to dig along this line of thought first.

"I think about it. Ram Shu pondered for a moment and then said slowly: "It seems that every city has a city lord's mansion, there are barracks, there are farms, there are mysterious places, these are the things I have seen in every city, and there are some special buildings, but not in every city. ”

"Do you have to have those buildings to ensure the stability of the city?" guessed Yu Changan, pinching his chin.

Zhang Jiao thought for a moment and said, "It's very likely." ”

"Do you know something?" Yu Changan looked at him.

"I'm just guessing. Zhang Jiao said: "Obviously, if we use conventional methods to build the city, it will definitely not be able to be built, after all, no matter how fast we build, the city wall will eventually collapse and break." However, if you look at the process of building a city with the way of formation, you may have to consider it comprehensively. ”

"The way of the formation is like this, it takes a very complicated process to arrange a magic circle, none of the array eyes in a complete magic circle can be missing, and the slightest deviation in the position is not allowed, and even some high-level magic circles have strict requirements for the arrangement of the array when arranged, and a little deviation will make the magic circle invalid, and the larger the magic circle, the more such a problem will occur. ”

"Build a city with the way of the formation?" Yu Changan nodded slowly, although everyone was just guessing, he felt that they had already guessed eight or nine, even if they didn't really use the way of the formation to build a city, it must be about the same rule.

But the question now is who can figure out the real heart of this?

"Why don't you try to build a city with the way of formation?" Yu Changan looked at Zhang Jiao: "As you just said, you see a city as a large magic circle, and then you arrange it, is this okay?"

Zhang Jiao smiled bitterly and shook his head: "No, not to mention that all this is just my guess, the problem is that I don't even have a formation diagram like this? I only have some research on the way of formation, and I am not strong enough to create a large magic circle out of thin air." ”

Speaking of this, he looked at the situation around him and continued to shake his head: "Even if you find a formation master now, facing the environment of the Chaos Land, it is impossible to create a formation map for you that can be used to build a city out of thin air. ”

"So, if you want to build a city here, you have to find someone who understands?" Yu Changan muttered, and after finishing speaking, he nodded immediately: "It must be the case." ”

"Where to find it?" Zhang Jiao asked.

This is a good question, Yu Changan is also ignorant of the Chaos Land now, how can he know where to find clues.

Although it has been a while since these people entered the Land of Chaos, in the end, until now, they have not had a clear understanding of this place, and they have even been co-opted by a tribe of necromancy in a confused situation.

At this moment, the ram on the side suddenly pointed in one direction and said, "Go over there and look for it." ”