Test firing of pneumatic guns has begun, and a dull rumbling sound sounded on the battlefield.

Every time a cannonball landed on that gate, it caused a ripple of magical aura. However, the bombardment of these shells did not hit the city gate itself, and was blocked by the shield attached to the gate. This Ancient Shield is known to be using what technology it uses, and it is far more powerful than a regular City Shield. Although it looks thin, it keeps all attacks at bay.

However, the original purpose of the test shells was not to break the door, but to calibrate the angle of the artillery. At a distance of more than a kilometer, it is not difficult to hit a tall door. Soon, all the cannons were adjusted to shoot at Zhu Yuan, and they began to hit the city gates.

Other artillery began to cover the head of the city, but from what the Mage's Eye had watched, there were few enemies on the city, and the test fire just now caused almost no casualties.

"I thought they would take advantage of the superiority in strength and send troops to surprise us, but I didn't expect it to be such a tactic that can't be flinched. Xiao Chen looked at Heimuguan opposite and said.

Wang Jiyuan said: "The strength of the army cannot only be judged by the number of people, as long as the commander of the other side has an understanding of the combat effectiveness of our escort army, he will not think that he has an advantage in strength." Even if they send out 10,000 troops and the strength of our two regiments to fight in the field, I am afraid that they will not be able to get any good. The strength of a soldier's individual ability does not compensate for the generation difference in weapons. As long as they are not invulnerable, the frontal assault on the troops, equipped with more than 80 pneumatic guns, can only go and never return. ”

"But it's a bit troublesome now, and the other party learns quite quickly. Xiao Chen said, "Knowing that this method should be used to avoid harm, now looking from the mage's eyes, there is no figure on the city or the ground." I reckon that their forces were hidden in a room in the wall, which was a triangular hypotenuse on the reverse side, which was an anticline for the ballistics, and it would not be easy to injure them with shells. ”

Wang Jiyuan said: "That's not necessarily, if the other party has been cowering in the room, how can we stop our siege team after we blast open the city gate? If this is the case, then our purpose of artillery cover will be achieved." I guess they're testing where the shells will fall, and in the previous battles, our pneumatic guns were mainly fought by flat fire, and perhaps in their understanding, the trajectory of this pneumatic cannon was similar to that of a large crossbow. But what they don't know is that our two guns are designed to take into account the curved fire, and when they come out, hehe, there will be a good show. ”

"Let's hope so, then we're going to get started. Xiao Chen flew off the ground and flew to the top of a dirt slope on the side. Luo Ling, Mao Kai and Liu Yisheng were already waiting for him above. The three of them each stood at a corner of the dirt slope, and together with Xiao Chen, they formed a diamond-shaped position.

Xiao Chen stood still in his place, and under the unified command of Liu Yisheng, who was most familiar with the magic of stardust annihilation, they began to cast a joint spell against the city gate.

This is the first time that the scene of the four great magicians casting spells together has appeared in the Tower of China. Anyone around who had a sense of magic could feel a powerful magic surging between the four of them. Although these four people have just begun to cooperate, their control of magic is not comparable to that of ordinary mages. Xiao Chen has overcome the problem of his mental instability, Luo Ling has healed his secret wounds, Mao Kai has studied magic theory more deeply than anyone else, and Liu Yisheng turned out to be a sage, and they can maintain the resonance between the four of them in the best state without any password or command.

Soon, sparkling lights floated around the four. This is also the biggest feature of Star Tower magic, and the magic effects when casting spells always remind people of the brilliant stars in the sky. These starlights began to slowly converge around Liu Yisheng, who was in the main control position. He walked towards the city gate in the distance, and those points of light were like streamers, rushing towards the city gate, spanning a distance of more than a kilometer, connecting him with the city gate.

After the test firing, the pneumatic cannon responsible for striking the city gate had stopped, and there were no magic fluctuations on the city gate. However, when these seemingly inconspicuous starlight fell into the range of the doorway, it was like a scoop of water being added to a hot oil pot, and the magic lines on it suddenly flashed.

Unlike the magical halo that had just been stirred up by the cannonball, the magic light was no longer a steady spreading ripple, but a small and chaotic beat. Those inconspicuous starlight began to cut into the circle through the magical light on the door, and they appeared in the middle of the magic lines, beginning to block the operation of the circle.

Although the ancient circle on this gate was very complete, with multiple lines to supply energy, as time went on, the blocked pathways became more and more numerous, and in some places even began to erupt in clusters of sparks due to the blockage of the magic passages.

Ten minutes later, the circle on the door began to flicker and flicker, and sparks continued to burst from different locations. It is clear that there is already a serious problem with the energy supply of the circle. Wang Jiyuan put down the binoculars in his hand and gave an order like an artilleryman: "Start breaking through the city gate!"

More than 30 guns, led by two 200mm pneumatic guns, were replaced with armor-piercing shells and began to attack in batches. This time the situation was very different from the previous test launch. As long as the cannonball hits the part of the circle where the light is dimmed, it will actually hit the city gate, causing damage to the city gate. Although the door was made of thick metal, it was only a matter of time before a cannonball exploded on it, creating a deep crater and losing its magical protection. The impact of the shells, in the joints that constantly tear the door, is inferior to the bolt and the hinges as well as the door panels themselves.

Shell after shell, like a drumstick striking the gate, made a loud noise, a sound that had not been heard in Kurokikun for thousands of years.

More than a dozen rounds of shells had been fired, and in Wang Jiyuan's telescope, the door had been covered by rising smoke and dust.

He ordered the attack to stop, and after a few minutes the smoke cleared, and the door was unrecognizable, the door on the left had completely fallen to the ground, and the door on the right had been twisted and half off. From here, you can already see the light on the other side of the doorway.

Wang Jiyuan's face did not change, and he said to the herald beside him: "Notify the reconnaissance troops and carefully observe the reaction of the enemy in Heimu Pass." ”