Hearing Hou Aoxuan mention gunpowder, Ling Yi suddenly remembered that there was another ore in his ring, and hurriedly asked, "Is there any gunpowder, but there are a lot of phosphorus powder and magnesium powder here!"

"Phosphorus powder, magnesium powder, what is that?" Wei Wentao asked.

"Phosphate powder is a mineral, magnesium powder is a metal powder, phosphorus powder has a very low ignition point, and magnesium powder is easy to cause explosions, this time it is just useful!" Ling Yi explained.

"And such a good thing, then the Northern Wilderness supply team is going to be miserable!" Wei Wentao said excitedly with the others.

"But also be careful, you need to pay attention to the placement of these two things, and I will have to arrange them myself when the time comes, otherwise the enemy will not blow us up but will serve us in a pot!" Ling Yi explained.

"Then your task is to burn grain and grass, and our task is to take the opportunity to seize the city of burial grounds!" Wei Wentao patted Ling Yi on the shoulder and said.

In order to complete the task, Ling Yi led Sun Ze and a dozen or so people to re-infiltrate the city of the burial ground before the early morning. Taking advantage of this opportunity, Ling Yi distributed magnesium powder to everyone, so that they could find an opportunity to mix magnesium powder into the grain and grass, and it took a day for them to successfully complete the task, Sun Ze led more than ten people to continue to hide, and Ling Yi went out of the city and began to arrange phosphorus powder at a position thirty miles outside the city, and now the temperature of the northern wilderness grassland is still low, so there is no need to worry about phosphorus powder spontaneously combusting in advance.

The day after Ling Yi was arranged, a herald from the Northern Wilderness appeared on the road from the Dangyu tribe to the burial city, and Ling Yi knew that the war had begun.

During this period, Hao Jun sent Wu Pavilion helpers from the northwest mountains to Lingyi, they were all Yan Yunqu's crossbowmen, and their archery skills were superb.

On the evening of the third day of the scheduled battle, a herald from the Northern Wilderness sped over the road where Lingyi and them were ambushed.

Then after a while, the burial city became noisy, and after dark, a lot of torches suddenly appeared outside the city, and the neighing of many war horses was heard, and the critical moment had arrived.

Commanding several crossbowmen, Ling Yi waited for the Northern Wilderness supply troops to come.

There are a total of six magnesium powder and phosphorus powder points arranged by Ling Yi, stretching for six miles, and the order he gave to the crossbowmen is to take care of both the beginning and the end, he is at the last point, as long as he makes a move, the others will shoot at the same time when they hear the explosion, and come to a dazzling color!

As Ling Yi expected, the entire supply team stretched for seven or eight miles, very large, watching the supply team slowly move towards the direction of the tribe to the east, Ling Yi took out a bow and crossbow, there was a steel arrow on the crossbow, he aimed at the position of the stone on the road, as long as he shot an arrow, the steel arrow shot on the stone, sparking, phosphorus powder burned when it met the spark, then the surrounding phosphorus powder, magnesium powder and magnesium powder hidden in the grain and grass in advance will burn and explode, and his task will be perfectly achieved.

Watching the supply team of the Northern Wilderness move forward step by step, and finally there was a team of about a mile, as long as he moved half a mile further, Ling Yi launched an attack, and his bow and crossbow were already aimed at the stones prepared in advance.

The team was still continuing, just as Ling Yi was waiting, he saw a blue flame suddenly rising in a place not far away, he hadn't reacted yet, many places of phosphorus powder he had arranged spontaneously combusted, and the crossbow arrows did not shoot only to hear a rumbling sound resounding through the sky, and then there were loud noises one after another, and the earth was also trembling.

Looking at the crossbow arrow in his hand, Ling Yi didn't know what was going on, looking at the Northern Wilderness supply team that fell into the sea of fire, as well as the torches they fell to the ground, Ling Yi reacted at this time, it should be the sparks on the torches that fell to the ground or the baking of the torches for a long time, so that the phosphorus powder caused spontaneous combustion.

Ling Yi is also lucky, he did a lot of calculations, and actually forgot the torch in the enemy's hand, fortunately, God gave face, and only caused an explosion in the end, otherwise it would be wasted.

The explosion and the sea of fire that stretched for six or seven miles illuminated the entire night sky red, and the dead grass on the grassland also burned with the explosion downwind, and the supply team of the Northern Wilderness fell into a sea of fire, and many soldiers were trapped in the fire and were engulfed in the fire in an instant.

Standing in the distance, Ling Yi observed the fire, and then looked at the direction of the city of burial, sure enough, the sound of horses' hooves came from the direction of the city of the burial place, their goal was achieved, now it depends on how Sun Ze in the city to meet Hao Jun and Dongsheng's troops into the city.

Coming out of the city of the burial place to rescue is the guard of the city of the burial place Dacro, he is asking for orders to stay in the city of the burial place this time, for the sake of safety, the empire also equipped him with a mortal crossbow, originally thought that this was an easy errand, except for the grain and grass, others, there is no problem, especially Wanqing grassland has 50,000 cavalry, there is no need to worry about himself at all, today received a military order, he organized the transportation of grain and grass for the first time, as long as the grain and grass were successfully delivered to the tribe, then his task was completed for the most part, but who knows, when he was drinking a little wine, an explosion and trembling sound in the east made him sober up instantly, and the secret way was not good, hurriedly organized 8,000 troops to go out of the city to investigate.

When he looked at the fire in the sky, he knew that something was wrong, so he personally led the team to the east at full speed, what he hoped most now was that his supply team had passed, otherwise such a big fire would definitely burn the supply without a single grain left.

But such an idea is wishful thinking, he knows that things will not be as beautiful as he thought, otherwise it would be impossible not to blow up the net and not blow up sooner, but what about the explosion at this time?

What he didn't know was that when he left the city, his north gate was taken over by a dozen people, all the defenders were killed on the ground, and the city gate was wide open.

After Hao Jun heard the explosion in the northwest, he already knew that Ling Yi had succeeded, so he led the team down the mountain as soon as possible, ambushed outside the north gate, and saw a bright light appear in the gatehouse on the city gate, knowing that it was Sun Ze's stone signal, he immediately led the team to attack the north gate as soon as possible.

After successfully taking over the north gate, Sun Ze and other soldiers divided into three routes, and it only took less than a quarter of an hour to capture all the east, south, and west gates.

Since then, at dawn, Wu Lingyi's troops have easily captured the city of the burial ground without spending a single soldier.

It was at this time that Dacros, who went out of the city to rescue the supply troops, rushed to the site of the explosion, and saw the fiery grain and grass, his anger rose straight up, and at the same time he also knew that this time he would face the harsh military law of the imperial prince Bu'er Chijin Tuoli, and now that he thinks about it, staying in the city of the burial place is not a good errand, and his head can't be saved!

He didn't notice that while he was directing the rescue, a figure quickly moved towards him.

The screams of the wounded soldiers, the occasional explosions, and the fact that the wind on the prairie was blowing the prairie fire fiercely, Dacros did not notice the dark shadow that had come behind him.

With the experience accumulated on the battlefield, Dacros only felt a chill in his back, and said secretly: It's not good, it's murderous!

Hurriedly cast the True Qi Defense Barrier, ready to resist the enemy's blow, but the True Qi Defense Barrier that he was proud of was only a single blow, and was smashed to the ground by the sneak attackers behind him, and he also staggered forward with blood in his mouth.

At this time, the guards around him also discovered the situation and shouted "enemy attack", and prepared to protect Dacro.

However, how could their speed be faster than the black shadow of the sneak attack, only to see a giant hammer slam into the ground, a "God of War trampling", everyone around them was dizzy, their feet trembled, and their eyes were dull.

Even Dacros was not spared, and before he could see his figure clearly, he was bombarded to the ground by a giant hammer falling from the sky, and his chest was no longer human, and he could not die again.

The person who attacked this sneak attack was none other than Ling Yi, who saw him kill the Northern Wilderness General with a blow of the giant hammer, and then with a twist of his arm, he knocked the surrounding guards out one after another, and he didn't know whether he was alive or dead, he turned around and disappeared into the chaotic crowd.

Even the soldiers of the Northern Wilderness had not reacted, and their general died like this.

Ling Yi found a few brothers who rushed over and retreated in the direction of the burial city, as long as they resisted the attack of this wave of soldiers from the Northern Wilderness, they could begin to collect the loyal bones of the martyrs, and then use the fortifications of the burial city to repel the cavalry on the Wanqing grassland that might come to attack the city!

Ling Yi and the six people rushed back to the city of the burial ground, only to see Wei Wentao standing at the city gate, and when he saw Ling Yi and the others returning, he hurriedly ordered the door to be opened.

After the round with Wei Wentao, the two introduced the situation to each other, and they were both happy.

After hearing that Ling Yi had killed the top general of the Northern Wilderness, Wei Wentao was even more confident in guarding the east gate, a group of stragglers, he had such a good fortification, there was no need to worry about it.

Since there is no problem on Wei Wentao's side, Ling Yi went directly to the North Gate, which leads to the hinterland of the Northern Wilderness, and it is very likely that he will be attacked by the Northern Wilderness, but the West Gate is safe, so Hao Jun has already moved five of the ten mortal-level strong crossbows in the West Gate, and made up ten of them, just in case of emergency.

Now, Wei Wentao guards the east gate, Hao Jun guards the north gate, and Zhang Cheng and Hou Aoxuan guard the west gate, each leading 500 soldiers.

And Sun Ze and Ah Hai guarded the south gate, with more than 1,100 troops.

Before, Wei Zhi's army threatened this Wanqing grassland, and with the arrival of the army of the Northern Wilderness, the entire burial ground city was no longer free of the people of the Northern Wilderness, so it was okay, Ling Yi really didn't know how to deal with it, and it was not agreeable.

After leaving enough magnesium powder for each city gate to be tied to the crossbow bolt for fire attack, Ling Yi came directly to the south gate.

At this time, Sun Ze and Ah Hai had already led the crowd out of the city to the two giant pits, in addition to sending fifty scouts, there were also one hundred soldiers left behind at the head of the city, and the two were leading the brothers to collect the bones of the martyrs in the huge pit.

Ling Yi walked out of the city, watching the brothers carefully use horse leather to gather the loyal bones in the huge pit, Ling Yi's nose was a little sour, this is the long-cherished wish of his grandfather before his death, and it is also the wish of the Dongsheng soldiers, and now that he has finally fulfilled his promise, his grandfather and father should be very happy in the spirit of the sky!

Taking out a bottle of sorghum wine, Ling Yi raised it above his head, and said loudly: "Comfort Duke Zhongyong in the spirit of the sky, Wu Lingyi has fulfilled his mission and fulfilled your long-cherished wish of his life, I promise that I will escort the loyal bones of the martyrs back to my hometown completely, even if I die, I will not live up to my mission!"

Saying that, Ling Yi poured wine on the ground three times, and then continued: "The soul of the martyrs is above, Wu Lingyi led the two thousand six hundred and eighty-four brothers of the Wu Lingyi Department to lead the way for the martyrs today, let's go home!"

As he spoke, Ling Yi poured out the drink three times again.

With Ling Yi's voice of consolation, the sky gradually became gloomy, especially in the south, a lightning bolt slashed, and the thunder rolled in in an instant, and the momentum was extremely majestic.