When Liu Zhengyang left, the city defense system had just been developed, and it was very different from the current city defense system.

From the appearance alone, the city defense system has undergone certain improvements.

It's just that he didn't see the specific data, and Liu Zhengyang didn't know what the current capacity of the city defense system was.

Right now, this advance team is not in any danger, and Liu Zhengyang doesn't care to watch it for a while.

"Sure enough, it's the same as last time!"

Polly watched his tribe attack the shield, and silently recorded the frequency and amplitude of the shield's shaking. I have to say that under such an attack, the shield was quite stable.

At least the critical value has not been reached.

However, Polly is different from the ordinary royal family. When he comes into contact with human technology, he is very addicted.

As a royal family, Polly's memory can be said to be very outstanding. Taking advantage of the opportunity of the black soul invasion, he already has a complete set of scientific theories, and he has already learned them all.

It's just that his actions are quite contemptuous by other royal families.

In their opinion, they have absolute strength, and they can completely handle what human beings call technology. Under such a crushing situation, there is no need for learning!

Polly's mind was quite tough, and others ignored him, and others lost interest after laughing a few times.

After all, Polly is known for being a weird guy in the clan.

However, Polly's strength is still very tyrannical, otherwise it will not be valued by Bors.

"Listen to my orders later!"

Polly said suddenly.

The people of the Mengtan family frowned, but after all, Polly was the current commander-in-chief, and when the first two protective shields were opened, Polly was writing quickly beside him.

What it is, he can't understand it anyway, but the last time he followed Polly's command, he almost broke the **** protective shield.

Now that they heard Polly's order again, although these people were a little hesitant, they still waited obediently instead of attacking indiscriminately.

Polly muttered to himself.

"Resonance! Resonance will definitely cause problems with this shield!"

Seeing that the shield was constantly shaking under the attack just now, now because the attack stopped, the fluctuation range began to weaken.

And at this moment, Polly suddenly said, "Shoot!"

The giants of the Mengtan family waved their fists and smashed into the shield at almost the same time.

The protective shield that was about to be stabilized suddenly trembled, and the amplitude of the tremor was even more violent than when everyone attacked together!

Although Liu Zhengyang cooperated with the demon emperor and handed over the city defense system to them, these demon clans only know some basic usages, and they don't even know what the flashing red light on the city defense system means!

A flash of joy flashed in Polly's eyes. Although the city defense system has not been breached, the intensity of the current shield shaking is enough to show that his guess is correct!

"Prepare!"

Polly's breathing became a little heavier, his eyes stared at the vibration frequency of the protective shield, and then he suddenly waved his hand: "Hit!"

After this attack, the city defense system that was protected in the middle of the advance team suddenly emitted a cloud of blue smoke, and then the lights began to flicker.

At this point, even a fool knows that there must be a problem with the city defense system.

"I knew that human things were unreliable! Brothers, prepare to fight to the death!"

The tauren who just praised the city defense system turned his head and began to belittle it. It can be said to be very realistic.