The blue-black metal city wall is one hundred and sixty-six feet high, with the bottom layer being thirty feet thick and the top being sixteen feet thick.
Just this height and thickness made Xiao Cheng faint.
Compared with this great building, it was so thick in previous lives.
In this life, the fortifications seen in reality or in movies are all like children in front of giants and cannot be compared at all.
Densely packed human soldiers armed with weapons patrolled and defended the corridors opened on and in the city wall.
The corridors extended in all directions, like spider webs, running through every corner of the metal city wall.
Just think about the overall length of this great building.
Fifty million miles away, Xiao Cheng felt that he had seen the most incredible dream scene, and could only admire the endless creativity of ordinary people in this world.
The top of the city wall and the wall facing the enemy are covered with various types of arrow towers.
There are triangles, squares, and rhombuses in which soldiers are stationed in turns.
As long as they are on duty, they are fully armed and alert.
Once the demons and demons attack the city wall and climb up, these arrow towers will be the first line of defense.
It is said to be an arrow tower, but it actually stores countless weapons for defending the city.
Stones, flaming logs, and all kinds of venom that can kill demons without being killed by the mysterious method.
Of course, the most numerous ones are the bows and arrows that have been blessed by the mysterious method.
The archery tower at the top is relatively huge.
There are huge city-defending giant crossbows.
There are several feet of crossbow arrows on them.
They are all in a half-strung state.
If there is a war, they can fight immediately.
The crossbow arrows shot from a high position can carry enough power.
Penetrating the bodies of ten holy masters, as for the demon army, they could only plow a bloody path when encountering such a sharp weapon.
Inspiring weapons requires skill and ability.
The soldiers guarding the city's giant crossbows are all of extremely high cultivation.
The captains are all above the Holy Realm.
Ordinary giant crossbow operators must be above Liutianmen in order to be able to shoot accurately at this height.
The best and most penetrating crossbow arrow.
Nangong Ding pointed down at the building proudly and said to Xiao Cheng: "Factory owner Xiao, you saw it, this is the world-famous metal city wall.
We humans have another name for it, called guardian.
This is The nickname shows how important it is to Sizhou."
Xiao Cheng lowered his head, his eyes piercing through the clouds and overlooking the majestic guardian.
He felt dizzy.
Hearing the words, he said softly: "This is a miracle.
It was made with the blood of many people."
Nangong Ding sighed.
"Yes, hundreds of millions of people died in the construction process in order to rush to repair the fortifications.
But they were not forced to build the fortifications, but volunteered to sign up.
The whole people were mobilized, and every family sent an adult to build the fortifications. , there are no adult men, the empire originally exempted them, but there are still strong women carrying tools and riding on urgently mobilized flying magic weapons to come here to participate in the work.
The number of people who died from exhaustion cannot be counted, and the four continents will not forget them."
Speaking of this, the prince choked up.
Thinking about it, that unbearable past event touched his heart.
This prince was concerned about the country and the people, which endeared Xiao Cheng to him.
"Your Highness, don't be sad.
Only after the Guardian was built, people can live and work in peace and contentment.
Everything has to pay a price.
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Monsters and demons have suffered a lot here, right?
Xiao Cheng comforted Nangong Ding.
"It's natural".
After hearing this, Nangong Ding adjusted his mood and said impassionedly: "The guardians who were bought at a painful price naturally have the ability to make the two realms of demons and demons tremble.
Factory owner Xiao, look, if you look at the guardians from the two realms of demons and demons, you will It seemed that the metal wall they faced was filled with protruding honeycombs of different styles.
These horrifying-looking honeycomb-style archery towers were the first steel line of defense to guard human territory.
If the demon soldiers climb up and capture the archery tower, the archery tower will immediately separate from the metal wall and fall downwards.
The soldiers inside and the demon soldiers will perish together.
The corridor behind the archery tower will be automatically closed, and soldiers will be sacrificed to save the carriage.
Although it is cruel, it is extremely dangerous.
It works, otherwise, the monster soldiers will enter the metal Great Wall through the corridor, and that will be bad."
He continued: "There are countless magic circles arranged on the entire city wall to form a powerful protective force.
The material of the guardian is indestructible.
With the protection of the magic circle, even the masters of the Holy Realm cannot destroy the city wall.
The guardian triggered the invincible sword contained in the Fairy Sword Mountain The Qi, vertically upward along the city wall, is arranged into a giant network of sword Qi, which is invisible, but can be sensed by the masters of the Holy Realm.
This thing blocks the use of the flying magic weapon.
The demon tribe can't even think about transporting troops.
The giant sword energy net has gaps, just like a fishing net, with small grids.
A person can fly sideways through these small grids without disturbing the sword.
The giant air net goes through it, but no matter how small the troop-carrying flying magic weapon is, it cannot be smaller than the giant net with a diameter of less than two feet.
You can only look at the sky and sigh, and you can't cross half a step.
The demon clan power flew up very high, but was shocked to find that the invisible sword energy giant net was the same as the Immortal Sword Mountain.
It was impossible to feel where the highest point was, and it seemed to extend into an alien space.
In other words, it was impossible.
By ascending and leaping across this barrier, using the invincible sword energy contained in the Fairy Sword Mountain to build a successful guardian has become the biggest obstacle that the demon and demon clans cannot overcome."
Having said this, a gloating smile appeared on Nangong Ding's face, and he said jokingly: "The top masters of the demon and demon tribes were extremely angry because of this, and they jointly attacked Fairy Sword Mountain.
They thought that if they smashed the mountain, the invisible sword energy network would dissipate, and that would be enough.
Use flying magic weapons to transport the soldiers over and continue the invasion.
But what shocked them was that most of the hundreds of demon and demon masters who joined forces to attack Fairy Sword Mountain were killed by the furious sword energy released by Fairy Sword Mountain, and a small half escaped with their lives, but their souls were injured.
He was seriously injured and had to retreat to heal.
From then on, whoever dares to attack Fairy Sword Mountain is not because he is too short-lived and the two realms of demons and monsters can only find ways to attack the metal city wall."
Xiao Cheng was relieved.
Hearing that Fairy Sword Mountain had killed the masters of the demon and demon tribes, a smile appeared on his face and he motioned for the fifth prince to continue.
"The demons from the holy realm formed a commando team and flew to high altitudes to compete with the human holy realm for the defensive position on the top of the city wall.
I don't know how many battles they fought.
Even if the two holy realms of demons and demons temporarily captured the highest point of the city wall, the masters from the four continents holy realms would be able to do so immediately.
Fight them back.
During the tug-of-war, the two demon clans fully realized that it was impossible to break through this natural wall.
They could only find a way to break through the fortress.
Over the years, the most important battles have focused on espionage and counter-espionage operations.
The two demon clans hope that human traitors can help them destroy the defense of the metal city wall.
As long as they control part of the center of the formation, they can stop the giant network in the sky for a period of time. , the armies of demons and demons can enter the human kingdom with the help of large flying magic weapons, and then it will be an unstoppable attack."
Nangong Ding said seriously.
Obviously, the situation is not optimistic.
The unquenchable desire of the demons and demons to invade the two realms has made human beings feel the pressure on their backs.
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Ordinary people cannot feel the pressure.
As royals, they look at the scenery, but in fact, they bear the pressure on their shoulders.
Xiao Cheng looked at the prince whose expression turned solemn, and thought of the saying that is known to all women and children on earth: the greater the ability, the greater the responsibility.
This really makes sense.
Nangong Ding became interested in the conversation, and then said to Xiao Cheng: "In terms of the combat power of the top masters, the Four Continents and the Two Domains are basically the same, but in terms of the army's combat power, they obey orders and are not afraid of death.
They have not evolved completely.
They only know The warriors of the two tribes of demons and demons who obey orders with their brains are extremely terrifying.
They are one to ten at the same level, and their combat power is extremely scary.
Humans are not a piece of steel.
Once the guardians are lost, the countries in the four continents can easily be eaten one by one.
Fortunately, over the years, the demons and demons have tried countless methods, but they have never succeeded.
The guardians firmly guard the safety of the four continents, and the people can live and work in peace and contentment.
This is entirely at work."
Having said this, Nangong Ding stopped talking and felt strange in his heart, why he said so many words to Xiao Cheng.
Maybe Xiao Cheng is a very knowledgeable listener, so Nangong Ding can find a reasonable explanation.
"Your Highness, according to your introduction, I have a basic understanding of the history and main situation here.
There is one thing I want to ask.
If there are enough masters of the Demon Clan and the Holy Realm, they can lay down the top defensive position to cover the climb of the Demon Clan.
If it passes, Four Continents will be finished, right?”
Nangong Ding looked at Xiao Cheng and suddenly smiled.
"Don't worry about this.
The biggest weakness of the demon and demon tribes is their numbers.
After all, they have more trouble with childbirth, and the number of top masters can never keep up with humans.
What's more, when it comes to weapon refining, humans are just behind them.
Their combat power is terrifying.
False, but we have the strength in numbers.
We use more to fight against the less.
When the masters of the Holy Realm fight, the demons and monsters cannot take advantage of each other.
If you want to cover the army's climb, you need to be stationed at the highest point for at least ten days.
They cannot hold it during this time, and humans must mobilize all their strength to push them back.
In this regard, we are still very confident."
Nangong Ding is full of confidence.
Xiao Cheng smiled.
"I'm just a little worried.
That's right.
There aren't enough masters in the transformation stage of the two realms of demons and above.
Most of their city residents are ordinary humans who have fallen into the two realms.
I'm a little unfounded.
There won't be masters of the demon realm.
The number exceeds that of human beings."
"Hahaha, of course you are worrying too much.
The word "unfounded worry" is so strange, but I understand what you mean.
In fact, if they had enough holy masters, they would not need an army.
The holy masters would pass through the gaps in the giant net and kill them.
The top power of mankind, if that happens, the Four Continents will inevitably be lost.
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They didn't do this because there weren't enough of them.
If they were to wear them to cause trouble, they would be surrounded and suppressed by humans, and they would still have to flee back.
Therefore, this aspect is not a problem.
In a word, if they want to invade, they need to cross the guardian, but can we let it happen?"
Nangong Ding laughed.
Xiao Cheng felt relieved and smiled, knowing that this person was very good to him.
Although these details were not top secrets, they were not known to everyone.
If this person could introduce them in detail, it seemed that he regarded him as a good friend. .
Xiao Cheng was a little moved.
At this moment, a giant eagle flying boat patrolling at high altitude approached.
Xiao Cheng was attracted and looked over anxiously
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