The collective disappearance of the Iron Locusts is obviously a precursor to the gathering of locust tides to reproduce and by the way.

In this regard, Bai Yuqi asked the Mercenary Guild to issue an emergency evacuation alert in nearby states and counties, and asked those scattered people to temporarily move to the Taiji Imperial Capital for refuge to prevent casualties caused by locust infestations.

The good news is that although the Iron Locust has evolved a hard armor, its body has become very heavy because of this thick exoskeleton.

As a result, they can't fly too high and too far, so they can barely catapult and take off on the spot, then flutter and glide for a distance before landing, and the process is repeated.

The average altitude of the flight can only reach about 30 meters, and the 45-meter-high walls of the Taiji Imperial City can just block the invasion of most of the locusts, thanks to gravity.

Bai Yuqi, dressed in a dark golden "holy robe", stood at the head of the Taiji Imperial City, looking at the night sky with a muffled thunderous roar, and behind him were hundreds of Wuji Sect disciples wearing silver armor and tens of thousands of dragon cavalry guards, waiting for the attack of the locust swarm.

Soon, countless dinosaurs as strong as cattle and covered in pitch-black bone armor leaped one after another, appearing within the illumination range of the [Daylight Technique].

Qin Qiong, who was in charge of leading the dragon cavalry guard, raised a dragon flag that he was carrying with a war lance in his hand, and shouted: "Raise a crossbow!"

Obviously, his voice was not loud enough to reach everyone's ears, but all the dragoon guards let out an uproar and raised their new crossbow guns in their hands.

In fact, all it takes is a [Communication] rune array base plate embedded in the helmet of the Dragoon Guard to solve the problem of communication difficulties between generals and soldiers on the battlefield.

Unlike the teleportation card engraved with the [SMS] rune array, which can only display text, the communication range of [Communication] is not as large as that of [SMS], but it can still cover the range of voice calls on a battlefield.

For the dragoons who had already cultivated their "mana", they didn't even need to inlay arcane crystals on the base plate of the [Transmission Technique] rune array, just the mana injected by themselves was enough to talk.

It was just the use of a few low-level spells, but it completely changed the combat mode of the Tang army.

There is no need to pass on military orders through such cumbersome order transmission methods as flags and heralds before the start of the war.

"Launch!"

As the huge swarm of locusts entered the firing range, Qin Qiong shouted again.

A long crossbow resting on the shoulders of the dragoon guards made a muffled sound that tore through the air, and a special crossbow was sprayed with a loud "bang".

A crossbow gun equipped with a scope and engraved with [Target Ray], [Spell Enhancement], [Spell Upgrade], and [Spell Strength] Runic Array is no worse than the rifles of later generations, both in terms of range and power.

The main thing is that the [Arrow Shooting] released by the spell energy does not cause recoil when the ballista is fired!

The ballista with the [target ray] light trail left obvious ballistic traces in the night sky, accurately hitting the locusts hundreds of meters away.

A special crossbow bolt inlaid with a [Thunder Stone] warhead and a [Sharp Technique] rune array will deflect the rotor the moment it is discharged.

Under the action of rifling and air flow, it spins at high speed, and at the same time as hitting and penetrating the locust bone armor, the [Thunder Blaster] warhead will burst open, releasing an explosive energy equivalent to the power of the grenade, tearing the seemingly indestructible bone armor of the locust to shreds like a paper shell!

In the night sky, the flames bloomed in the roar, like fireworks from the festivals of later generations, and they looked unusually beautiful!

Bai Yuqi smiled slightly, he had always been reluctant to get this kind of dangerous thing out, because he was afraid that Li Shimin would have the idea of conquering the world when the Tang Dynasty was not ready, but in order to survive the difficulties of the locust invasion, he couldn't care so much.

However, the price of the warhead is very high, and the production is very limited, which is simply not enough to supply the war.

The sky-high price of 300 pieces is enough to stop Li Shimin's ambitions, so he doesn't have to worry about what unrealistic thoughts he has when he is poor and has only a face left.

The round of salvo just now, calculated according to one per tithe, shot out 300,000 times, to say the least, which was enough for Li Shimin to be distressed to the point of dripping blood for a long time.

However, the explosion of 1,000 [Thunder Blasters] warheads, which are equivalent to sniper grenades, destroyed a large number of locusts and completely dispersed the swarm of locusts.

The flames, chaotic currents, and roaring shockwaves of the explosion caused the locusts to lose their balance and fall from their gliding state to the ground, and the next step was to use ordinary metal ballista to snipe the chaotic locust swarm.

Compared with the civilian low-end version of the crossbow gun, which can only be charged and fired once in 6 seconds, the batch of military high-end crossbow guns equipped for the Dragoon Guard are engraved with six [Arrow Shooting] rune arrays, which is equivalent to firing once per second.

Although the metal crossbow bolt is not as powerful as the [Thunderstone] warhead, it can also shoot through the bone armor of the locust and cause damage to it, even if it can't be killed, it can greatly weaken the locust and reduce the pressure of the next white-knuckle battle.

The scene of 10,000 people firing a salvo is spectacular, but the consumption is also amazing!

The price of a metal crossbow is not as high as that of the [Thunderstone] warhead.

However, because it is necessary to install a delicate rotor and the workmanship is very intricate, it is necessary to have a consistent one.

In order to make up enough ammunition, Bai Yuqi suspended the work of all the gold masters in [Tiangongmen], and made it with all his might, delaying a lot of projects.

Even so, it was only a case of sixty bolts for each of the dragoons.

In this way, in this locust extermination war, the ammunition alone will burn nearly one million yuan of the Tang Dynasty's financial budget, and Li Shimin's Hubu Shangshu has already fainted in the hall crying.

At a distance of just a few hundred meters, the dragoon guards only relied on a salvo of crossbow guns, and they were unable to advance the swarm of locusts.

As soon as they are within range, they will be accurately shot by the condescending dragoons, hitting the musculature between the wings behind them, destroying their ability to fly and falling.

But the height of about 30 meters is not enough to kill these dinosaurs with thick skin and flesh.

So soon, the fallen locusts got up again, using their strong and powerful thighs to jump and continue to rush towards the Taiji Imperial City.

He even jumped up and climbed the wall, grabbed the stone wall with his sharp claws, and gradually climbed up!

A large number of dragoons put down their crossbow guns and drew their swords, and flew down from the city wall with a shout of rage, like divine soldiers descending from the sky to meet the swarm of locusts that pounced.