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As a former scientist, he immediately saw the doorway.

If you want to maintain the balance of the sword array, you must meet the two conditions of the resonance frequency of the fighting qi and the balance of the output at the same time!

These swordsmen find tacit understanding through long-term practice, in fact, they rely on a practiced instinctive habit to adjust their fighting qi to achieve the balance of the sword formation.

In a trance, he vaguely thought of something, but he didn't have time to think about it now, so he suppressed this thought first and waited for it to think later.

The movement in the wilderness was extremely fast, and after a few days, everyone had already left the wilderness where Lingyun King City was located and entered a mountainous area.

What surprised Li Yunfei was that the more they advanced, the more slowly the terrain rose, and it seemed that the place they were about to go to was a plateau.

Fortunately, the warriors of these Lionheart Imperial City are all elite, and his wind chariot does not have to be tired, so the speed of progress has not slowed down.

After a few days of getting along, he had also figured out Mountbatten's temper.

Although this prince is the younger brother of the Lionheart Emperor and has a noble status, he does not have the slightest swagger, as long as he is acquainted, he can be called a brother and a brother, and he is very easy-going.

Moreover, he also has a problem with alcoholism. In Li Yunfei's space ring, there were a lot of spirits that he had distilled, and he took out a few bottles and gave them to Mountbatten to drink, and after a few glasses of wine, he immediately had nothing to say.

After talking, he learned that the Demon Spirit Emperor City, the Lionheart Emperor City, and the Divine Emperor City, the three major golden imperial cities of the human race, could be said to have their own characteristics.

Among them, the Demon Spirit Emperor City is heavy on magic and is the world of magicians, the Divine Emperor City is heavy on divine arts, and it is the territory of the temple, and the most important thing in the Lionheart Imperial City is the fighting spirit, so it is a city of swordsmen.

At the same time, in addition to the fighting spirit, the Lionheart Imperial City also took great care of the use of alchemy!

On the contrary, the Demon Spirit Emperor City, which is dominated by magicians, is not very interested in alchemy, and in the eyes of those orthodox magicians, alchemy is completely sideways.

The Lionheart Imperial City is different, after all, the Douqi Sword Technique is a hand-to-hand combat method, so it needs the support of alchemy to attack from a distance, so it attaches great importance to alchemy.

In the entire Lionheart Imperial City, there are a large number of alchemists, and alchemy is extremely developed, forming a complete set of mature alchemist promotion systems, and at the same time, there are different categories of divisions. It can be said that compared to the alchemy level of the Lionheart Imperial City, the Black Iron General City and the Silver King City are completely uncivilized places.

And the alchemy equipment of most of the low-level cities in the entire human world is also from the Lionheart Imperial City, especially the powerful war weapon of the magic cannon.

After hearing this, Li Yunfei immediately felt at ease.

This Lionheart Imperial City can become one of the three golden imperial cities of mankind, standing for thousands of years, it will naturally have some unique features of its own.

On the tenth day after leaving Lingyun King City, the terrain finally began to calm down, and the homeless settlements that appeared from time to time in the wilderness also increased.

It's been a long time since you've encountered giants here, and it's clear that this is already the depths of human territory.

At this time, Li Yunfei had already sensed that they had come to a plateau.

There was a heavy fog on the field, and it was foggy and it was impossible to see what was in front of them, but Mountbatten and the others all had happy smiles on their faces.

After another half a day, the sun rose, and then a strong wind blew, and the fog in front of me began to dissipate rapidly.

Li Yunfei was driving the wind car slowly, when he saw the fog in front of him suddenly drift to both sides, and a huge golden city appeared on the horizon in the distance!

The moment he saw this city, Li Yunfei couldn't help but lose his mind for a while, and he thought in a trance that he was back on the earth.

The huge city in front of you, stretching for dozens of kilometers, is made up of golden buildings. The buildings are all tall buildings, row upon row, with a circular layout that shrinks inward, looking magnificent and magnificent.

And what shocked Li Yunfei the most was that the city didn't have its own city walls!

After coming to this world, all the cities he had seen, whether it was the Black Iron General City, the Silver King City, and even those small towns, were surrounded by high walls. And the walls were built to be extremely thick and strong, in order to prevent the invasion of giants.

And the city in front of him is almost the same as the city on the earth in Li Yunfei's memory, just composed of dense buildings, located in the wilderness, just like a charming girl without clothes.

Seeing Li Yunfei's slightly surprised appearance, Mountbatten couldn't help but smile proudly and said, "Welcome to the Lionheart Imperial City!"

It turns out that this is the Lionheart Imperial City! Li Yunfei couldn't help but nodded, and his heart suddenly dawned.

As one of the three most powerful Golden Imperial Cities of mankind, this Lionheart Imperial City no longer needs city walls at all.

Ordinary low-level giants can be easily destroyed, and if the giant frenzy can come here through the outer Black Iron General City and Silver King City, then it must have reached a critical juncture for all mankind.

The Black Iron Giant alone can jump dozens of meters, and the Silver Giant can jump hundreds of meters directly, not to mention the terrifying jumping ability of the Golden Giant, so it makes no difference whether there is a city wall or not.

However, although the Lionheart Imperial City did not have a city wall, Li Yunfei also found that there were some towering pillars on the edge of the Lionheart Imperial City.

The height of these pillars reached about seventy meters, and the diameter was more than one meter, and the whole body was painted with lion reliefs, which looked like towering spires, enclosing the Lionheart Imperial City. And the buildings in the entire Lionheart Imperial City are all built within the range of the pillars.

Obviously, there is something strange in these pillars!

Mountbatten followed Li Yunfei's gaze, immediately nodded approvingly, and said, "Thor, you are really smart, and you immediately discovered these pillars of magic energy. ”

Li Yunfei couldn't help but raise his eyebrows.

At this moment, I saw a rock giant in the wilderness swaying towards the Lionheart Imperial City.

This rock giant didn't know how to go so far from the giant's territory to the human territory, it looked lonely, but it seemed to smell the smell of humans in the city, and it seemed to be extremely excited, and unconsciously quickened its pace.

It's just that when he came to a distance of about a hundred meters from the Lionheart Imperial City, he saw that the nearest pillar of magic energy suddenly erupted a white pillar of energy, and a "hiss" pierced the heart of the rock giant.

In an instant, the rock giant shattered into a pile of rubble, and rolled into a pile of stones and rolled to the ground.

Seeing this scene, Li Yunfei instantly understood what this thing was doing.

This encircled the thousands of pillars of magic energy in the Lionheart Imperial City, and it was completely a powerful automatic defense system! No wonder there was no need for a wall at all!

At the same time, he could feel that the closer he was to the Lionheart Imperial City, the richer the magical elements in the air became, which obviously had something to do with those pillars of magical energy.

At this moment, Lao Yan's voice sounded in his head: "Tsk, this thing is really good, if there was this thing in Stag City before, it would have lasted a few more years." ”

Mountbatten blinked, smiled at Li Yunfei and said, "This magic energy pillar has other uses, and you will understand it after a long time." Now follow me into the Imperial City. ”

"Then it's better to be respectful than to obey. Li Yunfei said with a smile, started the wind car, and headed towards the Lionheart Imperial City.

Half an hour later, they had arrived not far in front of the Lionheart Imperial City.

At this time, Li Yunfei discovered that in the wilderness around the Lionheart Imperial City, there was a circle of earthy circles with no grass, enclosing the entire Lionheart Imperial City.

If you look closely, it is the attack limit of those magic energy pillars.

There was a lot of sand and gravel in the ring, as well as some bronze and black iron components, and some of the giants who had been here before.

It's just that what makes Li Yunfei a little strange is that there seem to be some human bones.

Just as everyone came to this ring, a wave of spiritual fluctuations instantly came from the nearest pillar of magical energy, sweeping through everyone one by one, and at the same time, there was a strong hostility, as if they were ready to attack at any time.

Mountbatten immediately took out a crystal ball and shook it. This crystal ball is sealed with a piece of spiritual power.

The spirit wave swept over the crystal ball and disappeared immediately.

Mountbatten breathed a long sigh of relief and said to Li Yunfei: "Let's go, you can go in now." ”

Seeing this scene, Li Yunfei frowned slightly, and said, "In this way, this magic energy pillar will attack any object that enters the attack range, whether it is a giant or ...... Humans?"