With the shielding effect of the dragon beard, the group of them swaggered and flew in mid-air, stunned that no one was noticed.

Of course, the original Long Xupa did not have this effect, but Gu Tiancheng was a master of magic reform, and he had a new understanding of the study of formation, and he had new materials to use, so he would definitely not be able to help but transform some of the finished products in his hand, and Long Xupa naturally couldn't avoid this fate.

The dragon whisker is originally a defensive magic weapon, and it also uses some biomimicry functions, which can be vividly imitated into boulders or mounds to hide people's eyes and ears.

Gu Tiancheng's magic change focused on increasing the effect of invisibility. There are two aspects of invisibility in reality: one is invisibility under psionic band scanning. As long as you can effectively absorb the psionic rays within a certain band range, you can achieve invisibility within this band range.

If you can achieve full-band absorption, you can achieve full-band invisibility. A day of dust and water can achieve such an effect. Therefore, with Gu Tiancheng, who has a dust and water, he can't wait to put the invisible needs into practice.

There is also a kind of invisibility, which is invisible to the naked eye. It can only be invisible within a certain range of wavelengths, and it cannot be invisible within the range of the naked eye. Because as long as there is a band of light reflection, it can be observed by the naked eye.

Invisible to the naked eye can only be achieved with full-band absorption. Tianyi Dust Water perfectly meets this requirement.

In other words, by using Tianyi dust water, perfect invisibility can be achieved!

However, the Annihilation Attribute of Tianyi Dust and Water is too strong, and if certain measures are not taken to expose Tianyi Dust Water to the air, Tianyi Dust Water will absorb a large amount of surrounding spiritual energy, thus forming a black hole effect of spiritual energy in the surroundings. With such a violent fluctuation of spiritual energy, it is impossible to hide the feelings of any spiritual cultivator.

It just so happened that Gu Tiancheng also began to advance by leaps and bounds in the formation, and he could use the formation to skillfully limit the annihilation attribute of Tianyi dust and water, take down this unruly stubborn donkey in one fell swoop, and obediently serve himself.

So there was such a "feat" in front of him: rushing to the Iron Wall Fortress in a grand manner, without fear of being discovered by anyone.

That's the power of technology. Gu Tiancheng, who was born in industrial civilization in his previous life, can be said to have diligently pursued advanced science and technology into the bone marrow, and can even be said to be an obsession. Even if it turns out in the end that it is not of great use, as long as there is, Gu Tiancheng must find a way to master it, and he cannot be stuck by others.

With the perfect stealth of the dragon beard, they came to the city of Tiebi Fort smoothly, and then Gu Tiancheng took out the blue dagger made of Tianyi dust and water as the main material, dug a gap in the heavy defense of the outer part of the iron wall, and then drilled in.

It's like digging a tunnel, digging a section, drilling a section. The section of the road that I walked was repaired casually. Even if the guards of the Iron Wall Fort were dutiful and stared at the screen of the defense net without blinking, they could not detect anything abnormal. At most, it was a flash of psionic clutter, which was too normal, and a magical beast passing by could cause this effect.

This will not only allow you to successfully pass through the defense network around the Iron Wall Fortress, but also deeply study a series of defense parameters such as the structure and performance of the defense network, the band setting, and so on.

Of course, these precise Living Valley Heavenly achievements are left to Kerry, and he only needs to concentrate on passing them.

Through the defensive network on the periphery, Gu Tiancheng did not risk showing up, but hid under the cover of the dragon beard and observed below for a while.

I saw a group of soldiers at the gate below, where a group of soldiers were checking the people entering and leaving one by one. And those who enter and exit will obediently take out a card, and after the soldiers defending the city have checked the authenticity, they will be released.

It must be a pass or something.

Gu Tiancheng had an idea in his heart, took everyone to the ground quietly, and then quietly performed the mirror technique, mirrored several passes, one for each person, and then through his own hands, with the help of Kerry's accurate positioning and computing power, the information on the pass was perfectly changed.

Unless the pass uses the high-end chip anti-counterfeiting in the previous life, Gu Tiancheng has no way to counterfeit it, otherwise, the fake by Gu Tiancheng's hands will be more real than the real one!

Sure enough, with the pass in their hands, Gu Tiancheng and the others could easily pass the inspection at the city gate. Because there were many handsome men and beautiful women in their group, only Ari Hill looked older, just like the principal of their group, so the soldiers guarding the city also took special care of them in a friendly manner, and went straight to their destination when they entered the city, and did not run around, it was easy to cause trouble.

Gu Tiancheng: Are they still afraid of trouble? So, of course, they take this sentence as a deaf ear. When I came to Tiebi Fort this time, I originally came to appreciate the people of different regions, and how to appreciate it if I didn't walk around?

After entering the city, everyone discussed for a while, and felt that it was better to settle down in the accommodation first, and then go out for a walk.

So, everyone began to advance towards the most prosperous part of the Iron Wall Fort, afraid of taking the wrong road, and kept asking for directions along the way to confirm, and finally came to the foot of the ground, everyone was stunned, and they couldn't believe that the deserted street in front of them was the so-called prosperous territory.

Although there are shops opening on both sides, there is obviously no business, and the clerks are sitting listlessly at the door basking in the sun, and when they see them coming, they have no intention of coming forward to solicit customers.

Everyone looked at each other: What's going on?

This kind of thing is inappropriate for a woman to come out, so Gu Tiancheng took the initiative to step forward, grabbed a clerk and began to ask.

Gu Tiancheng knew the rules, and before he could speak, he handed over a few coins to show his goodwill. Seeing the copper coins commonly used in the Shining Continent, the clerk's attitude was obviously much better, and he asked with a smile what he needed.

Gu Tiancheng casually told a lie, saying that they were from other places and came here to visit relatives, but who knew that the relatives were not there, which made them pounce. I had no choice but to come out and find a place to stay on my own.

People on the street say that this is the most prosperous territory of Tiebi Fort, why does it look deserted and unmanned. In such a place, you can't pay for death when you open a store?

The clerk laughed happily, and the smile was very condescending, "It seems that you guys are indeed coming to Ironwall Fort for the first time." Forts are not a good place. People who have access are trying to get out, what are you doing here?

This is indeed the most prosperous boundary of Tiebi Fort, yes, but the prosperity here does not refer to the day, but to the night! Because during the day, people who have the ability to come out to consume are still working, and only at night can we see the appearance of prosperity here. ”

"At night?" Gu Tiancheng seemed to understand a little, "You mean, the best time for your business here is at night? Could it be that the people here are busy with work during the day, not shopping, and not leisure?"

The clerk said, "Leisure, of course during the day." However, there is nothing to relax during the day. You don't know yet, Iron Wall Fort, everything is distributed from above! You have money during the day, and you can't buy anything!"