Tut-tut...... Coming to the top of the city tower, Du Feng carefully looked at the True Yuan Cannon. If it weren't for the beast tide crisis this time, I really wouldn't have been able to touch this kind of national weapon.

"Captain Xie, how do you use this thing?"

Although Du Feng was a formation mage, after all, it was the first time he came into contact with the True Yuan Cannon, and he didn't dare to move by himself. If this thing were to blow up, it would be powerful enough to collapse the walls of Ishihara Castle. When the time comes, before the demon beast attacks, it will be a big joke if he destroys the defense line first.

The True Yuan Cannon is a big killer, and it is not used on a daily basis. Even if the beast tide is coming, it is easy not to fire. When there is a giant monster that is difficult to kill, it will bombard its head or heart with a true yuan cannon to achieve the effect of killing with one hit.

If the effect is good, why not fire easily, the reason is very simple, the cost is too high. If you want to open a shot, you not only need to inject a large amount of True Yuan into the Returning Realm Monk to activate it, but also need to fill fifty blue crystals as raw materials. These fifty blue crystals will all be compressed into true element shells, and each true element bullet can only fire one shot. And after firing the first shot, it needs to be cooled for half an hour before the second shot can be fired.

The cooling time plus the time to fill the hedron and inject the true element, the front and back of this cannon will take an hour. Therefore, when there are no giant monsters, it is best not to fire. Because after firing this cannon, it will take a long time before the next cannon can be fired, and it will be troublesome if the giant demon beast attacks in the middle.

Of course, there is one of the most important reasons, that is, the hedron is consumed too hard. The azurites needed by several guard captains to manipulate the True Yuan Cannon were all distributed by the City Lord's Mansion. After firing the first shot, you can get the fifty aquamarines needed for the second shot. Therefore, the captains are very cautious and do not dare to make a move. In case you don't hit the target, fifty azurites will have to be cushioned by yourself. They are captains of the guards, and they don't make a few dollars a year. Since they have to buy pills and weapons for cultivation, and they have to support their families to make a living, no one will be able to get along with money.

Come on, monster beast cubs, Du Feng hoped that the beasts would arrive later when he was on the border, defense, and line. The mood is the opposite, hoping that the herd will arrive soon. The beast tide was overwhelming, and he could experience the power of a true yuan cannon.

"Boom ......"

Perhaps the heavens heard his call, and the earth began to roar, and the ground shook violently. This vibration was transmitted to the city wall, but the city wall did not move. The reason is simple, the walls of Ishihara Castle are blessed with formations. Not only that, but the foundation of the city wall is also very deep. The underground part is even better than the above-ground part to prevent some monsters such as pangolins and rats that can burrow into the ground from digging up the foundation of the city wall.

Ooh...... This is the real beast tide, and there are not enough to see on the border, defense, and line in comparison. It may be because the preparation time of the herd is relatively long, and it is wide enough without the mountain forest to block it. A large number of demon beasts lined up in a square and launched an attack on Ishihara Castle.

"Open the door!"

"Help!"

"Let's go inside!"

"Boom ......"

There was a mess under the city walls, and the cries of children slamming the doors and shouting for help were mixed together. Before, the wandering warriors knew that the beast tide was coming, and some of them fled in advance, but most of them stayed. They have adapted to life in Ishihara Castle and don't want to leave easily.

Because Ishihara Castle stopped handling temporary identity cards in advance, many warriors who had a little money in their hands couldn't enter the city. If you can't enter Ishihara Castle, you can't leave with the help of a teleportation array. The lives of the poor are so worthless, and if the tide of beasts really swells under the city, they are pure meat pads.

"Crossbowmen ready!"

Ishihara Castle's equipment was much stronger than the sideline, and tens of thousands of crossbowmen lined up in two lines along the high walls. They have strong crossbows in their hands, and the pulling force has reached a thousand catties. With the addition of a heavy crossbow arrow, the effective range is 700 meters. Because the position of the station is relatively high, this range will be increased accordingly.

As long as the monsters are within a kilometer range, the crossbowmen have to shoot, and they can't wait for the beasts to get close before they move. The speed of the beast tide is very fast, and it is about to enter a distance of a kilometer. The tents of many wandering warriors have been trampled and trampled by demon beasts. None of them dared to speak out, and they all honestly shrank under the wall at the moment, hoping to escape this catastrophe.

"Boom!"

At this moment, a blinding white light was accompanied by a deafening explosion. In the dense herd, it was as if someone had thrown a large bomb. A small mushroom cloud rose from the spot, and nearly 10,000 small and medium-sized demon beasts were directly blasted into pulp by the powerful shock wave.

"Who fired the cannon indiscriminately!"

Such a loud voice and such a great power can be seen at a glance that it is the true yuan cannon that is done, there are a total of four true yuan cannons on the city wall, and each captain controls one, which is far away. The other three captains didn't move, they all looked at Du Feng.

That's right, it was Du Feng who did it, he had long wanted to try the power of the True Yuan Cannon.

"What does Captain Du mean?"

Captain Duan was unhappy first, everyone is a colleague, and the position is the same, why don't you follow the rules.

"If you fire the cannon privately, you will have to bear the losses. ”

Captain Duan and Captain Lin, they were all promoted by Zhai Ming. I was not happy to see Du Feng as the captain, but now he even let him control such a good thing as the Zhenyuan Cannon. This guy is unruly and should be unlucky to open fire without permission. Even if Xie Haikun has a personal relationship with him, he can't be sheltered like this.

"What loss, do you mean hedrons?"

Each shot costs fifty aquamarines, as everyone knows. Only by firing the cannon according to the rules can you get the support of the City Lord's Mansion to distribute the spar again. If the cannon is not fired according to the rules, then the damage is borne by the individual. Du Feng didn't pay attention to it at all, and took out fifty blue crystals and placed them beside him.

Isn't it just money, what's the big deal? He just got 400,000 azulites from Boss Qian, what is a shot at fifty, my brother should be a practitioner.

This...... Captain Duan and Captain Lin, their lips trembled. For a long time, Du Feng didn't care about money at all, and fifty blue crystals were taken out to play.

"Even if you have money, you can't delay the military plane, and if the giant beast appears at any time, if you can't respond in time, you can't afford the consequences,"

Captain Duan saw that Du Feng didn't care about money, and thought of another way to trouble him. Even if you Du Feng is not short of money, but the True Yuan Cannon has a cooldown time of half an hour, and it takes time to inject the True Yuan. If a giant beast approaches during this time, you will be punished if you can't fire the cannon.