The south side of the first-line heavenly road. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

Looking at the scene of rapid burning in mid-air, Fu Feizhang was frightened, and he didn't care about others, he turned around and rode his horse to run away, but it was too late at this time....

At this moment, the ignited flour, in Fu Feizhang's stunned eyes, the fire expanded rapidly, and in an instant, it filled the entire sky, and then ..........

Rumble~~~~

An earth-shattering explosion sounded, like the wrath of Thor, resounding through the heavens and the earth.

A terrifying mushroom fire cloud visible to the naked eye rose into the sky, the night sky within a radius of a hundred miles was illuminated, and even the villages and cities a hundred miles away were shaking slightly, and the people who had already fallen asleep were awakened by the sound of the explosion, and fled from the room in a panic, looking up at the direction of the firelight.

The source of the explosion was actually the flour on the top of the head of the Black Killer Army, and the mountain near the side of the Black Killer Army was violently exploded, the sky and the earth cracked, the mountain shook, and the tall rocks rolled down with the explosion, stirring up dust all over the sky.

After completing the task, more than 1,000 people including Ma Chao, who had just arrived at the foot of the mountain, were suddenly violently shaken, and their feet were unstable, and they fell to the ground one after another.

Ma Chao turned his head with difficulty and looked at the mountain in front of him, and intuitively felt that if he stayed here any longer, his life would definitely be lost, so he immediately roared and led the soldiers to run into the distance.

Chen Qingzhi and the others at the foot of the mountain retreated rapidly after the rocket was fired, but as soon as they turned around and retreated a few steps, a violent explosion occurred behind them, and the ground shook violently.

"Run~~" Chen Qingzhi quickly turned his head and looked at the mountain behind him, only to see a huge crack on the mountain that was clearly visible to the naked eye, spreading rapidly from the south side, Chen Qingzhi's whole body was cold, the previous calm was not there, he screamed in horror, and quickly rode away.

When the white-robed soldiers heard Chen Qingzhi's shout, they also turned their heads to look at the mountain above them, and then their eyes were filled with fear, and they screamed one after another, quickly got up, and fled into the distance with a roll, only hating their parents for missing two feet.

Boom boom boom ~~~

On both sides of the first-line heavenly road, the mountain body of more than 20 battles, with the explosion at the foot of the mountain on the south side, was shaken and cracked by the aftermath, shaking violently, and the huge stones of the battle kept rolling down, and the dust in the sky was flying, covering the entire sky, and the rumbling sound resounded for hundreds of miles.

Chen Qingzhi and the others, who ran five miles away in one breath, finally exhausted their strength, and more than 20,000 people fell to the ground at once, panting, looking at the glimmer of heaven shrouded in dust in horror.

At this time, the exhausted Ma Chao and the others finally caught up with the large army and joined the ranks of the 'carpet' clan.

In the shocked eyes of everyone, the roaring sound of a line of heavenly dao continued to sound, and in this way, after half an hour, the sound began to slowly decrease, and after another quarter of an hour, the deafening sound finally stopped, and the shrouded dust also drifted in the wind with the passage of time, revealing a line of heavenly dao at this moment.

"Wow~~" When the dust settled, when everyone saw the glimmer of heaven at this moment, they all changed color in an uproar, opened their mouths, and were stunned.

At this moment, on both sides of the first-line heavenly road, the towering mountains are empty, leaving only a large hole as wide as 100 meters!

The original one-line Heavenly Dao, which was only two battles wide, was gone, no, it should have been expanded, and it was expanded a hundred times.

After a long time, Chen Qingzhi finally came back to his senses from the shock, swallowed a mouthful of water with difficulty, and stammered: "This.... Power... Isn't it... Too big?"

Ma Chao beside him, his eyes were still staring at the first line of heaven in the distance, and when he heard Chen Qingzhi's Wenhua, he nodded mechanically.

"By the way, Meng Qi, how much flour do you use, how can it be so powerful?" Suddenly, Chen Qingzhi seemed to think of something, and hurriedly turned his head and asked.

"There aren't a lot of them, it's just a thousand stones according to what the lord said, but time is pressing, so we moved up to three hundred stones. At this time, Ma Chao also came back to his senses and looked at Chen Qingzhi in confusion.

"What? Three hundred stones, misty grass, you....... Do you still want to use a thousand stones?!Are you crazy?" Hearing this, Chen Qingzhi was taken aback, screamed, and looked at Ma Chao in a daze.

One stone is equivalent to about 120 catties, 300 stones is 36,000 catties, and 36,000 catties of flour explodes, can you not blow up the mountain that has been erected for thousands of years beyond recognition?

"Ahh It should be a thousand stones!" Hearing Chen Qingzhi's exclamation, Ma Chao was also taken aback, and said with some uncertainty.

When Chen Qingzhi heard this, the cold sweat on his forehead came down, and he said speechlessly: "Meng Qida..... General, I want to know now, how did you carry 300 stone of flour up the mountain with 1,000 people?"

"Huh, oh....... I asked each person to resist one bag, a thousand people, one trip is exactly a thousand stones, I wanted to run a few more times, but the time was urgent, and I really couldn't run, so I only ran three times, not to mention, these three trips really tired us enough....." Ma Chao replied with a natural face, patting his arms and sighing deeply.

Chen Qingyi covered his face, he really couldn't face this guy in front of him anymore, he could increase the amount of a hundred stones tenfold, he really hadn't seen it.

No wonder it took a whole hour to get the news out, feeling that this guy was busy moving flour, but fortunately the manpower was limited, he only ran three times, and moved up to 300 stones, if it was really used 1,000 stones, the consequences were really unimaginable!

"That.... Ziyun ghost capital, I... Is it too much?" Ma Chao saw Chen Qingzhi's appearance, a trace of uneasiness swelled in his heart, and he pointed at Chen Qingzhi's arm with his finger and asked carefully.

"Do you get too much?" Chen Qingzhi fell into deep helplessness again, and said weakly: "The lord said that it is a hundred stones, only a hundred stones, but General Meng Qi, you used three hundred stones, three times more, do you say that you used too much? Fortunately, you did not use a thousand stones, otherwise the consequences would be unimaginable?" said with a deep fear in his eyes.

"Ah, a hundred stones, no? I remember that the lord said a thousand stones, it should be a thousand stones, and it was ......... at the time" Ma Chao was stunned for a moment when he heard this, then frowned, and crossed his fingers to recall carefully.

Chen Qingzhi looked at Ma Chao, who was muttering with his head down, with an embarrassed expression, and then sighed deeply: "This so-called ..... of the lord Well... Powder explosion, yes, powder explosion is really powerful!"

At that time, Chen Qingzhi proposed a way to break through the first-line heavenly road, which was to hang the rope from the top of the first-line heavenly road, put down the dead soldiers, and burn the enemy's equipment, tower shooting, etc. at the risk of death.

As long as Ma Chao and the others can get close to the enemy's defense, Ma Chao's martial arts will definitely be able to break through the first line of defense, so that the enemy army cannot effectively defend.

It's just that this method also has several disadvantages, first, to make more than 20 long ropes, but also to ensure safety, it must consume a lot of materials. Second, the mountains on both sides of the first-line heavenly road, the mountain walls are steep, there is no place to step on, if you want to go down from here, you need the arm strength of the soldiers, one is not careful, not only will your life be lost, but you will also be discovered by the enemy.

Of course, I also considered shooting arrows or throwing stones at the top of the mountain, but the mountain is more than 20 battles high, which is now more than 60 meters high, and the mountain wind is howling, not to mention the strength, not even the most basic crosshairs, and the arrows just shot are blown away by the mountain wind.

The mountains on both sides are full of dense trees, and the largest stones are only the size of a fist, and they are scarce, and if you move up from the bottom of the mountain, it will take a lot of time, and the most precious thing is time.

Therefore, the plan proposed by Chen Qingzhi, although it was relatively dangerous, was the most effective and fastest method at that time.

Just when everyone accepted Chen Qingzhi's opinion and decided to shoot the case, Mo Xuan suddenly flashed a scene in his mind: the flour mill did not have any gunpowder and other burning materials, but there was an explosion, and finally it was found out after investigation.

When the dust in the air reaches a certain concentration, encountering a heat source (open flame or high temperature), the flame instantly spreads in the entire mixed dust space, the reaction speed is extremely fast, and a large amount of heat is released at the same time, forming a very high temperature and a lot of pressure, and the energy of the system is converted into mechanical energy and light and heat radiation, which has a strong destructive force.

After Mo Xuan's thoughts flashed, he suddenly stopped everyone, and then proposed a method, sprinkle powder on the top of the mountain on the north side of the first-line Heavenly Dao, blow to the south side with the wind from north to south, and when it reaches a certain concentration, then use a ballista to shoot rockets to detonate the dust.

In the end, Mo Xuan did a small experiment, allowing everyone to see the power of the dust explosion, and everyone was shocked and full of admiration for Mo Xuan, who would have thought that the flour that is usually eaten can have such power.

Considering that the night wind on the first line of heaven and earth is strong, the flour will be blown away, and in order to achieve a certain concentration, Mo Xuan carefully considered it, and decided to use a hundred stones, that is, more than 10,000 catties of flour, Mo Xuan's idea at that time was to burn the enemy's horses, stepping on shooting and other defensive equipment, causing chaos to the enemy army, and giving his army a chance to charge.

But who knows, Ma Chao actually turned a hundred stones into three hundred stones, a full three times higher, and the result of this is to blow up the bottom of the entire first-line heavenly road, and the mountain is affected by the aftermath and the bottom is unstable, with the first-line heavenly road as the center, the mountain within a few dozen meters on the left and right sides collapsed, leaving the 100-meter hollow that everyone sees now.

After a while, Chen Qingzhi, who came back to his senses, with shock and caution, led the white-robed army with a sluggish face, and slowly approached the first line of heaven.