Many of the students have studied cosmology and have a certain understanding of the structure of the universe. They all nodded thoughtfully.

But there are also some people who have not studied deeply. Although they know the existence of the world, they do not understand why the two worlds collide.

Outside Tianyuan, there is a vast starry sky. The nearest galaxy is tens of thousands of light-years away. It's hard to imagine how the collision happened.

Seeing that these students showed a blank expression, Mao Feng further explained:

"Yes, from the three-dimensional level, all the worlds are in the same sea of stars, just many galaxies in the universe."

"Our Tianyuan kingdom is one of the galaxies, and the blood demon kingdom is another galaxy."

"Theoretically speaking, there is no barrier between all the great worlds. We can sail freely. What blocks us is just a long distance."

"With the current technological level of tianyuanjie, refining a crystal warship that can sail in the universe may take millions of years to reach the neighboring galaxy, that is, the world next door to us."

"It will take billions of years to reach the blood demon world."

"From the three-dimensional level, Tianyuan galaxy and blood demon galaxy are separated by more than half of the universe, and the distance is so far that it is impossible for them to collide."

"But to get out of three dimensions, from a higher dimension, is totally different."

"In a higher dimension, every big world is like closed eggs, which are closely arranged in a way that we can't understand. If the two eggs are too close to each other, they will attract each other, collide with each other, and finally merge into a new big world."

"And our Tianyuan world is too close to the blood demon world, which attracts each other and forms a two world system."

Seeing that many people still didn't understand, Mao Feng thought about it, took out a piece of blank Rune paper and drew a circle on the opposite sides.

"See, this Rune paper is a two-dimensional sea of stars. The two opposite circles are Tianyuan realm and blood demon realm."

"In a two-dimensional universe, the two worlds are so far apart that it is impossible to navigate each other, let alone collide."

"But"

Mao Feng folded the paper in half, and the circles on both sides overlapped.

"If there is a powerful force that can break the void, break through the laws of the two-dimensional world, and understand the universe from the three-dimensional level, we will find that the two worlds are close at hand."

"This is the relationship between Tianyuan Kingdom and blood demon kingdom."

"As galaxies, we are at one end of the universe, hundreds of millions of light-years apart."

"But as the world, in the higher dimension, we are like these two circles, very close, produce gravity, hard impact, close together."

"Maybe one day, the two circles will merge into one!"

"Well, as a combat type practitioner, it's enough to know so much."

"More in-depth theory, let the research-oriented practitioners to explore it!"

"Anyway, as long as you know, the dark realm is the collision point between Tianyuan realm and blood demon realm. The powers of the two worlds meet here, making it the most abundant, violent and chaotic place of the two worlds!"

This truth is very simple, and everyone can understand it.

It's like the intersection of two oceans, the undercurrent of the sea bottom mixed with rich resources, all gathered together.

Mao Feng continued

"Abundant to almost violent power, it condenses into all kinds of natural resources, local treasures and crystal veins, and breeds extremely powerful mutated monsters and demonized plants, making it an inexhaustible treasure house!"

"But"

"The resources of the dark realm are so abundant, but it is too far from the interior of the Federation, and the power surge is too violent, which is not suitable for large-scale crystal warship formation navigation."

"If you force a large force here, if you are not careful, you will be involved in the whirlpool of psionic power, and the whole fleet will be torn to pieces!"

People can't help recalling the thunder and lightning last night.

It was not ordinary lightning, but the violent collision of the powers of the two worlds and the violent tides.

At the level of tianyuanjie's weapon refining, the crystal warship can't sail in such a power tide.

War in reality is not about playing games, it's about burning a lot of money.

When a large fleet is dispatched once, it will consume countless crystal stones and resources.

If such a fleet is torn apart by the psionic tide after a long journey, I'm afraid that most of the military expenses of the Federation will be taken in and reimbursed at one time.

This, however, does not include the loss of personnel.

This is also the reason why the Xingyao Federation has not completely conquered the dark area after five hundred years of bloody war.

Their biggest enemy is not the demon clan, but the nature, which is a powerful and unparalleled world!

"Listen, no matter how powerful the crystal warship is, it's impossible to gallop in the dark. Here, the practitioners, especially our armored division, are the boss and the main force of the war!"

Everyone was so excited by Mao Feng that they wanted to fight happily in the dark, hunting demons and beasts, plundering natural resources and local treasures, and madly improving their strength in the next second.

Mao Feng pressed his hands down, calmed the agitation of the crowd, and continued:

"That's about what happened in the dark. In the next month, we fought and practiced here. All the natural materials and land treasures we got were shared with the training camp. One percent of them was the loss of crystal armor, and the other percent was raised by our instructors. Is that ok?"

The crowd nodded.

Crystal armor is provided by the training camp. If it is damaged, it will cost a lot of money to repair it. Of course, it will cost a certain amount of wear and tear.

As for giving the drillmaster a commission, it's even more natural.

Five instructors, all of them are strong men above the middle level in the foundation period. After wearing the powerful new crystal armor, they can even play the terror power close to the golden elixir strong men!

It is under the protection of these five "quasi elixirs" that people dare to fight and cultivate in the dark.

Otherwise, a group of small things in the period of refining Qi come to practice in the dark, isn't that seeking death?

Only 10% commission for these "quasi elixirs" can't be more cost-effective.

Mao Feng nodded, then suddenly the words changed and he said:

"Well, since everyone has no opinion, we'll start to practice next, but there's one more thing to remind you before practice."

"In the dark, perilous regions, the number of thunderstorm and sandstorm areas is ten times more than that of the outside world, and the intensity is not comparable."

"There are all kinds of powerful mutant monsters, dormant in the dark, and will take us as prey at any time."

"And these are not the most terrible."

"The most terrible thing is the penetration teams of the demon clan. They are all elite in the regular army of the demon clan. Some penetration teams are even composed of the silver blood demon clan!"

Mao Feng's words made everyone take a breath

In his heart, Li Yao silently recalled the composition of the demon clan.

Different from human beings, demon tribe is not a real race, but a general name of countless kinds of monsters.

Among them, the difference between many monsters is bigger than that between monsters and human beings.

For example, some mammals, especially primates, such as monkeys and apes, are very different from humans.

However, it is quite different from arthropod monsters such as golden beetle.

How can a monkey treat a cockroach as its kind?

Even this cockroach has some wisdom!

Needless to say, many monsters are natural enemies. In the food chain, they exist chain by chain. They devour each other and kill each other for hundreds of millions of years. Deep hatred is engraved in their blood.

Therefore, from the beginning of the demon Empire 40000 years ago, the powerful demon clan has been using high-pressure rule, using extremely cruel methods to suppress the weaker demon clan and make them yield to enslave and drive the weaker demon clan.

After 30000 years of development, four classes were born in the monster empire.

At the bottom is the black blood demon tribe, which has the largest number and serves as food, farmer and cannon fodder.

Monsters such as the black beetle are the black blood demons.

They are the main force of invading the Tianyuan world, and they are also inexhaustible, inexhaustible superior cannon fodder. Even if they die, the high-level of the blood demon world will not be distressed.

Above the black blood demon clan is the copper blood demon clan, which is the class of soldiers.

The six armed snake demon Li Yao met in Qingze city is the copper blood demon clan.

They were born to practice killing. The meaning of life is to fight and destroy. They often act as front-line commanders and commandos.

Above the copper blood demon clan is the silver blood demon clan.

Silver blood demon clan is the aristocracy and royal clan of demon clan, the ruler of demon world and the main force of demon civilization.

Even can say, silver blood above, is the real demon clan!

The copper blood and black blood under them were only their slaves, cannon fodder and food.

In their eyes, they are no different from human beings, even worse than human beings.

After all, human beings can create splendid civilization, and many of them, the demon clan, are also quite useful.

As for the golden blood demon family, also known as the Holy Blood demon family, it is the real royal family.

The monster empire ruled Xinghai for 30000 years and replaced more than a dozen dynasties. The royal families of these dynasties all used massive resources to improve their blood and strengthen their strength, so they are called "holy blood".

However, in the change of Dynasty, these holy blood slaughtered each other.

After the establishment of the Xinghai Empire, the emperor focused on the pursuit of these holy blood demons, and almost killed them all.

Until today, the Holy Blood demon clan has become a legend. There may not be one in the whole blood demon world.

At present, the situation in the blood demon world is that hundreds of demon cities have been established by the silver blood demon family, and they are killing each other, cutting and annexing each other, gradually forming a powerful demon country.

The infiltration team composed of all the silver blood demon clans is equivalent to the "imperial army" composed of all the noble children, and its terrifying degree can be imagined.