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The flying sword kills the enemy, and the speed is extremely fast, but in just a few breaths, hundreds of bull demons have been beheaded.

"Puff puff!"

The flying sword continued to kill the enemy, and in the blink of an eye, dozens of bull demons were beheaded.

At this time, it finally attracted the attention of some masters of the Bull Demon Clan.

They all swung their weapons and smashed at the bronze flying sword, but the bronze flying sword was fast, small in size, and extremely flexible, besides, it was still in the midst of a large number of Bull Demon Clan soldiers, so these Bull Demon Clan couldn't help it at all.

On the contrary, during this period of time, it killed hundreds of bull demons.

There were many soldiers on the city wall who saw the scene of Song Yan spitting out the flying sword, and when they saw the flying sword passing, one by one the Bull Demon Clan was beheaded off, they couldn't help but show shock and surprise, and the eyes that looked at Song Yan were even more awe-inspiring.

"What kind of martial art is this? Can you kill people from a distance of a kilometer?"

The next moment, the sword trick in Song Yan's hand flipped over, and suddenly, the bronze flying sword went straight to the rear of the Bull Demon Clan, and the few masters of the Bull Demon Clan who surrounded the flying sword suddenly had no choice, and now the army was rushing in the direction of the human race's city wall, and they wanted to go against the current, how easy it was.

"Puff puff!"

The Bronze Flying Sword continued to kill the Bull Demon Clan, but the master of the Bull Demon Clan had no way to take it.

In just half an hour, the number of ordinary Bull Demon Clan soldiers who died under the flying sword had reached two thousand.

Finally, a captain discovers the location of the flying sword.

Grabbed a large bow and shot it.

Shout!

The arrow was like a streamer, heading straight for the bronze flying sword.

Song Yan, who was standing on the city wall, saw this scene, and the corners of his mouth couldn't help but show a trace of disdain, and as soon as his heart moved, the bronze flying sword shrank behind a bull demon clan and hid closely.

"Poof!"

The streamer successfully hit the target, but unfortunately it was the Bull Demon Clan.

"Whew!"

The bronze flying sword flew out like lightning, and everywhere it passed, dozens of bull demons were beheaded.

"Damn it!"

The Captain of the Bull Demon Clan couldn't help but be furious, grabbed a big sword and chased after the flying sword.

But soon, he gave up, because the flying sword was too small to move through the dense army at will, and he was too large to have a serious impact on his speed.

Half an hour later.

Song Yan took back the bronze flying sword, in this half an hour, he used the flying sword to kill tens of thousands of bull demon clans, if it wasn't for the Nine Emperor Princes seeing that the situation was not good, he sent a martial saint to block the flying sword, I believe that he could kill more bull demon clans.

Above the city wall, a large number of Bull Demon Clan were scalded by the dung water that fell from the sky, but they still couldn't block the crazy attack of the Bull Demon Clan, and the hundreds of meters thick city wall had been chiseled through most of it, and at most tomorrow, the city wall would collapse.

In the blink of an eye, it was evening, if in the past, the Bull Demon Clan should have withdrawn, but today, the Bull Demon Clan did not retreat, and was still attacking frantically.

With a thought, Song Yan came to the Commander's Mansion.

The battle information outside is constantly being sent here, and Lei Jiuming is in a state of anxiety at this moment.

"Xiao Huang, why are you here?, have you thought of a way to kill those black-robed bull demons?" asked Lei Jiuming.

Song Yan shook his head: "I'm not here for this matter, today, I have been watching the battle on the city wall, there are still a few hours at most, the city wall will be broken by the Bull Demon Clan, can the commander have a way to resolve it?"

"There's a way to fart, I can only fight with them!"

Lei Jiuming said in a violent tone.

"I have a way!"

Song Yan said.

"What way?" Lei Jiuming's eyes couldn't help but light up, and he even stood up from his chair.

"I can arrange a large array behind the city wall, but the arrangement needs to use high-grade spirit crystals!" Song Yan said slowly, although he had a lot of spirit crystals, he had not forgotten the assassination of him by the military, so it was impossible for him to take out the spirit crystals to set up the array.

His willingness to arrange a large array for the military is already benevolent and righteous, so this spirit crystal has to be produced by the military itself.

"How many spirit crystals do you want?"

"At least three thousand high-grade spars!"

Song Yan said.

Lei Jiuming was stunned for a moment, and then said, "Three thousand yuan! Where do I have so many high-grade spirit crystals, five hundred yuan at most!"

Hearing Lei Jiuming's bargaining, Song Yan couldn't help but be speechless: "Commander, do you think this is buying vegetables?

Hearing this, a trace of embarrassment flashed on Lei Jiuming's face: "That, that's a good point, but I really can't take out so many high-grade spirit crystals, and I can take out more than 1,300 pieces at most." ”

Song Yan responded: "The more spirit crystals, the greater the power of the formation, the more Bull Demon Clan can be blocked, the formation of 1,300 pieces can resist up to two or three hundred thousand Bull Demon Clan, once this number is exceeded, the formation is very likely to collapse." ”

"Your formation is really so powerful?" Hearing that the formation arranged with 1,300 high-grade spirit crystals could actually block two or three hundred thousand bull demon clans, Lei Jiuming was very skeptical.

"Believe it or not, but I have used the formation to trap three Martial Saints at the same time. Song Yan said lightly.

"If that's the case, then it can greatly reduce the casualties of my Terran warriors, but I really can't get so many spars, even if I ask the military for it, it's too late, after all, the Bull Demon Clan is about to break the city!" Lei Jiuming said helplessly.

Song Yan hesitated and said, "I can lend it to you." ”

"Okay, I can write you an IOU!" Lei Jiuming said very happily.

A quarter of an hour later, under the command of Song Yan, one by one the soldiers quickly dug the pit.

There are many people with great strength, and in less than half an hour, 3,500 pits were dug, and Song Yan put the high-grade spirit crystals into them one by one, and then ordered the soldiers to bury the pits.

After driving those soldiers out of the formation, Song Yan personally dug a pit in the center of the formation, and then buried three pieces of divine iron in it.

"Boom! boom!"

A deafening impact sound came, and with the impact, the city wall also continued to shake, and through the perspective supernatural power, Song Yan found that the city wall would be broken in two hours at most.

With a flicker, Song Yan landed on the roof of a house a hundred meters away.

The formation has been arranged, and he only needs one formation trick to activate the big formation.

Half an hour later.

Lei Jiuming came in person and asked Song Yan, "What's wrong?"

"It's already good, you can order the soldiers on the city wall to retreat!" Song Yan nodded.

"Good!"

Lei Jiuming ordered all the soldiers on the city wall to be withdrawn, but after giving this order, he was a little stunned: "Boy, don't let me down. ”

"Rest assured. ”

Song Yan smiled confidently, for the sake of insurance, he added three pieces of divine iron, not to mention that the Bull Demon Clan only has more than one million people, even if it is doubled, they will be trapped and killed in the formation.

Soon, all the soldiers on the city wall were withdrawn, and without the blocking of the Terran soldiers, the attack of the Bull Demon Clan became even more ferocious.

Half an hour later, I only heard a boom, but a section of the city wall collapsed, and a gap more than ten meters wide appeared.

[Author's digression]: Second change