Since the demons broke the spatial node and suddenly appeared in the rear of the Teris Empire, the calamity has come to the world without a trace of mercy. Until now, it is difficult for anyone to say what happened at that time, but in short, the war was voluntarily befallen the two races, and it continued for more than ten years.

At the beginning of the war, someone shouted the slogan of driving the demons back to the abyss, and countless young people joined the coalition army with enthusiasm, and in just one month, the coalition army had more than 800,000 new troops and 500,000 veteran legions, plus those who were known as the elite of the elite, led by members of the Guardian Knights of various countries. This series of statistics seems to indicate that the Terrans have enough strength and determination to achieve ultimate victory.

But the brutal truth made most people lose confidence, and in just one year, the coalition army, with a total number of nearly a million people, was cornered. They retreated again and again, from the north to the south of the Teres Empire, during which they experienced hundreds of battles of all sizes, and the loss of the strength of each wargroup was as high as seventy percent and failed to achieve a single victory, but instead lost the largest empire of mankind, Teres was completely occupied by the demons, becoming the first springboard for them to invade the continent.

After this lesson, the rulers of the human race, the kings, finally realized how terrifying the adversaries they were facing. The information in hand all proves the strength of the other party, and on the battlefield, the casualty ratio of the two deaths has reached an incredible 70 to 1, which is still the result of adding water.

Even those generals who had fought with foreign races on the mainland and won brilliant victories did not dare to boast of Haikou and guaranteed that they could take 70 soldiers to kill a demon race. Their bodies are extremely strong, and even the lowest-level demons have the characteristics of being invulnerable, not to mention that the demons also have superb martial arts. If it weren't for the scarcity of numbers, these generals would have even had the heart to persuade the monarch to surrender.

After learning the truth from the mouths of the generals, the kings deeply realized that it was no longer a question of whether they could drive the other party back to the abyss, and what they needed to consider was how to ensure that the human race would not be wiped out.

After a very short period of planning, countries have shown their cards. The army threw out high-level martial arts and high-end cultivation cheats that soldiers had never been able to access in the past. In the private sector, colleges and universities have also begun to open up their core areas. Do you want to learn advanced martial arts? Want to discover the core secrets of the Academy? Go kill the demons, as long as you can bring back the heads of the demons, it's all yours.

It was this change that allowed humanity to find a way out of despair, and at the critical moment of life and death, humanity burst out with amazing potential, and countless powerful men came into being, who used the spare time of war to fill in the valuable knowledge obtained from the academy of the country, and at the same time applied what they learned in battle, turning this knowledge into actual combat power.

Faced with the fact that human beings are gradually becoming stronger, the demons do not pay enough attention to it. In the eyes of those high-level demons, human beings are still ants, as long as they have the heart, they can pinch tens of thousands of them to death. Taking advantage of this, the Commander-in-Chief of the Human Alliance, Ken. At the military conference, Snow devised a strategy to show weakness to the enemy.

The lives of countless warriors were consumed as bait, and the human race used the most cruel plan to lure the main force of the demon race step by step into the Ordley Grand Canyon with dangerous terrain, and the elite legions that had been in ambush for a long time suddenly came out, completely cutting off their retreat. The ultimate power of mankind, dozens of great wizards teamed up at this time to cast a forbidden spell to break the forbidden spell - meteorite fell from the sky, the demon finally paid the price for his arrogance, more than 30,000 demon soldiers turned to ashes in an instant, only those who were on the edge of the forbidden spell survived. The remaining number of demons at this moment is less than three thousand, and most of them are disabled.

The human race did not give up the opportunity to beat the water dogs, and under the leadership of the strong man, the soldiers let out an earth-shattering roar and rushed into the canyon to start the fiercest battle with the demons.

No one can describe the horror of the battle, and from the few words left by those who survived, one can imagine how thrilling it was.

"The deep Audley Gorge was filled with corpses, and the blood of the two tribes converged into a wide red river."

When he saw this extremely simple description from the history books, Zhang Sheng could even smell a thick fishy smell.

"Millions of lives, just thinking about it makes my scalp tingle. It seems that the demons have killed the human race miserably, and even I have been implicated in vain, unlucky! Zhang Sheng sighed helplessly and put aside the book in his hand.

By reading the words in the book, he could clearly feel the fear and hatred of human beings for the demons, and at the same time understand where the strange gazes around him came from.

Because of the ravages of the demon race, human beings maintain a high level of fear and resentment towards all heretics, so Zhang Sheng's life in the academy is very difficult. As a visitor from another world, his unusual black hair, dark eyes, slightly soft face, and yellow skin have become synonymous with danger in this world, and it is natural that he will be neglected and discriminated against by others.

In this regard, Zhang Sheng has not thought of a way. For example, begging the old man who brought him out of the Lost Forest to teach him magic, and then use the magical ability of magic to change his alien characteristics.

The old man easily agreed to his request, but his physique did not have elemental affinity, and his mental power was too violent to control, which made him lose the prerequisite for learning magic.

"Is this the way I'm going to live my life? That's too much, isn't it? Scratching his head speechlessly, Zhang Sheng decided not to dwell on this issue. He glanced up at the magic clock and saw that four hours had passed before he knew it. "Those things should have been delivered." He thought.

"Miria, go get the materials I ordered." After unceremoniously ordering the little maid, Zhang Sheng turned around and walked towards his mentor's laboratory.

"Let me move by myself again, what a bad master, curse you will never be able to advance to alchemist!" Milia stared at Zhang Sheng's back and said through gritted teeth.

Zhang Sheng didn't know about the little maid's complaints, but he didn't care. It would have been nice if such labor had exhausted the overly energetic girl, otherwise she would have been entangled in bed again at night until she could no longer get up. Zhang Sheng felt that he had lost enough face, but that didn't mean he didn't care about his face.

"If I had known this would happen, I should have learned physical training, not damn alchemy. Could it be that high mental power can be exchanged for super staying power? Fack! Cursing in an unhappy mood, Zhang Sheng pushed open the door of the laboratory.

What caught my eye was an empty room covering an area of more than 160 square meters, which was cleaned up by the little maid, and the only thing that was a little eye-catching was a pile of low-quality garbage piled up in the west corner.

This is the most precious gift that the old man left to Zhang Sheng, although it is only a small laboratory, it is very luxurious for an alchemy apprentice.

Here, precious equipment is removed. It's not that the old man is stingy, it's that Zhang Sheng can't use it at all. His alchemy is unlike any other, and it seems that with the right materials, he can conjure up what he wants. Even the old man, who is a great wizard, can't say why.

"It's strange to be able to say why! That's the golden finger given to the master by the aunt. Zhang Sheng smiled proudly. After inadvertently touching the alchemy tool, a system inexplicably appeared in the depths of his mind, and thanks to it, Zhang Sheng also had a glimmer of hope to become stronger.

He cast his gaze to the west side of the laboratory, where a large pile of 'rags' had piled up, a large part of which were weapons made of various stone tools, including stone bows, stone swords, stone spears, etc., and there were many bronze weapons, but there were none of the iron tools used by humans today.

"It took a year to reach the middle of the Bronze Age, and I really don't know when it will be the turn of thermal weapons!" Looking at these 'rags' made by himself, Zhang Sheng frowned and sighed silently.

Naturally, these rags were not refined by some alchemy, but were conjured by the golden finger, which is the system rooted in the depths of Zhang Sheng's brain, also known as the "arsenal system".

The name sounds bluffing, but in fact its current version has only been updated to 2.0, which is the Bronze Age. The most advanced products that can be made are only some bronze swords, bronze shields, etc. And a large amount of copper ore has to be invested in each production, for which Zhang Sheng feels very painful.

Completely different from the immortal cultivation system, martial arts system, and abbot system configured by other predecessors, the arsenal system has no so-called tasks at all, and it will not come with a reward every holiday, it is like a rigid program, you can only light up your own technology tree project according to the rules it formulates, and achieve the purpose of manufacturing weapons and equipment. Once all of your tech trees are lit up, the system version will be automatically upgraded to a more advanced era, so that you can also get more tech tree items and make more advanced weapons.

As for how the tech tree is lit, this is the same as many strategy management games, the arsenal system has its own scientific research institute, as long as you keep investing in raw materials, you can exchange it for a certain amount of technology value through the scientific research institute. These tech values are the key to lighting up the tech tree.

For example, if Zhang Sheng puts 50 kilograms of copper ore into the system at this moment, then he can get 500 material units, and if he gives these material units to the scientific research institute, he can exchange them for about 10 points of scientific and technological value. In version 2.0 of the Arsenal system, the Bronze Dagger requires three technology points, and the Bronze Longbow requires seven points, which means that Zhang Sheng can use ten technology points to light up both research items.

When these items are lit up, they will be given permission to manufacture both weapons. If you want to make it, you also need to provide enough materials or technology.

Of course, none of this information was told by the system, but Zhang Sheng figured it out little by little through his own guesses, for which Zhang Sheng paid nearly a thousand gold coins, which is also the reason why countless rudimentary weapons were piled up in the corners of the laboratory like a hill and became garbage that no one cared about.

"Maybe you can sell this junk as an antique?" Zhang Sheng stared at the pile of hills, muttered to himself, and then remembered that he didn't know how to be old and foolish at all, so his idea was destined to be unrealizable.

"Money is not everything, but it is impossible when there is no money. Who put this fart? Really TM right! With a sad and indignant aria, Zhang Sheng gave up his fantasies.

Now the biggest problem restricting his ability to improve is money, whether it is stone or copper ore, he needs money to buy, and he is just a small alchemy apprentice, and the things he makes are some completely worthless garbage, so it is difficult to find someone to invest.

If it weren't for the fact that the old man left a huge experiment fee before leaving, Zhang Sheng would probably still be stuck in the 1.0 version of the arsenal system - the Stone Age. However, it was because of his diligence that the wallet finally dried up completely today, and the last few silver coins were exchanged for a small bag of copper ore. This means that if he doesn't want to find a way to make money, not only will the arsenal system come to a complete standstill, but he and the little maid will also face the danger of starving to death.

"Why don't you tell Miria to go out and sell it?" After the idea of antiques went bankrupt, Zhang Sheng hit the idea on the little maid again, but in an instant he gave up this idea on his own, because it was too shameless, and there was - the little maid's vitality was too full, and she didn't know how to cheat, and those who had the heart to touch her would probably be annoyed and angry afterwards. I haven't felt it yet. ", can make many male compatriots gorgeously defeated, and may not even be lifted from again.

Of course, the above ideas are purely YY, for some reason, the little maid once fell into a state of autism, Zhang Sheng paid countless sweats to make her return to her original character, if he dared to make such a non-dividing request at this time, the ending of the firewood knife should not be too happy......

"I really can't do it, I can only plagiarize." As a pseudo-house in the 21st century, Zhang Sheng doesn't have much valuable information in his mind, but there are definitely a lot of novels, as an alien who only has half of his personal freedom, he doesn't have to think about distilled liquor and the like, even if he invents it, it is cheaper for others, and he does not have spare money to buy those equipment at the moment, to say that only writing novels is the lowest cost input, with the countless YY novels in his mind, it should be no problem to write some manuscripts to earn some manuscript fees.

"I only hope that people in this world can understand otherworldly novels." Before making up his mind, Zhang Sheng prayed to Aunt Crossing very reverently. "Anyway...... With my current understanding of the world's writings, is it really a big deal to write such a complex text? ”