Glancing at the corpses on the ground, and the thick wooden shields, mousse coldly roared out new orders.

"Team up, prepare to attack the village!"

The island guards just beat back the second attack of the black orcs.

In this attack, the black skins adjusted their tactics. Each of them held a thick wooden shield in an attempt to block the bullets with them.

They also sent out more people, with a total number of more than 500 people, including old people with white temples, children with significantly shorter height, and even women.

It''s clear that the black Orc tribe is ready to put all their eggs in one basket.

This is also the first time that many people have seen female black orcs with their own eyes, but after only one look, all of them lose interest.

It''s so ugly.

Like the black skin of men, the black orcs of women have the same blue face and tusks, but the tusks protruding from the corners of their mouths are shorter and more slender. If their chests are not surprisingly large, many people will not recognize them as females at all.

The result is the same as the first time, the black Orc is defeated again.

The thicker wooden shield can''t effectively block bullets. It''s just that the distance of penetration becomes shorter. Originally, the shield can be broken 300 meters away, but now it takes 200 meters.

But the disadvantage of using thick wood shield is also very big. It''s heavier, and it''s inconvenient to walk with it, let alone run.

After the black orcs lost their speed, the island guards could aim calmly, and their hit rate increased a lot.

As a result, the casualties of the black orcs were more serious than the first time. More than 200 people fell on the battlefield, and the only awakened one in the village died.

More than half of the casualties occurred when they fled. When the black skin retreated, they all abandoned their wooden shields and ran for their lives with bare hands. The island guards could shoot black skin calmly from behind.

After two wars and two defeats, this tribe was completely crippled, and almost all the young men were killed. Only a group of old, weak, sick and disabled people were left in the tribe, unable to launch a new offensive.

There were only three minor injuries on the side of the island protection team, and they were all harmless skin injuries, which had little impact on the battle.

When the village guards came back, it was their turn to attack.

Strictly speaking, it should be called arson.

That is to say, the wooden houses in the village will be burned one by one. If the black orcs in the houses rush out, they will be killed by random guns. It doesn''t matter if they don''t come out. If they burn directly in the houses, they can save a few bullets.

This is the foreign version of the three light policy.

No, two lights, kill and burn, because the poor black orcs have nothing to fight for.

In order to set fire quickly, the island protection team also used a new prop, the burning bottle.

The light oil distilled from the black oil is mixed with thermite, that is, aluminum powder and ferric oxide powder, and then neutralizer, that is, a resin mixture that can increase viscosity and support combustion, is added. The final combustion agent is finished.

Finally, the liquid is filled in batch production ceramic bottles, and the combustion bottle is made.

This is also the best formula found by the magicians of Rune Research Institute after hundreds of experiments at the Lord''s prompt.

The preparation of aluminum powder is very simple. If the feldspar containing aluminum is thrown into the magic energy aluminum smelting furnace, aluminum can be easily obtained. After the aluminum ingot is ground, aluminum powder will be produced.

On earth, there is a certain danger in the process of preparing aluminum powder, because aluminum powder is very easy to oxidize, very small aluminum powder particles are suspended in the air, and the contact surface area with the air is greatly increased. Once the dust reaches a certain concentration, violent deflagration will occur when meeting the fire source.

Such an accident once happened in Huaxia. In a factory processing aluminum automobile wheel hub, a large amount of dust was produced when polishing the wheel hub. In addition, the ventilation condition was extremely poor. Unfortunately, the aluminum powder explosion occurred, resulting in more than 200 casualties. The cost was very heavy.

But in this world, there is no such worry at all. Hydrogen can''t explode. What''s more, it''s just a little aluminum powder. Don''t worry about grinding powder. If it can explode, Renault will dare to change its name to Dongfeng Renault.

As for the reason of this strange phenomenon, Renault has a conjecture.

As we all know, combustion is actually a violent oxidation reaction. In the oxidation process, combustible materials rapidly release a lot of heat, which makes the gas expand violently, and explosion also occurs.

But in the alien world, in the oxidation reaction, the speed of electron loss is inhibited by magic energy, resulting in the combustion speed is greatly slowed down. The sound of aluminum powder "deflagration" is not much louder than "fart". It is impossible to explode people, but it is possible to choke people with dust.

Feldspar is also very easy to obtain. On the earth, aluminum is the most abundant metal element in the crust, and the proportion of feldspar in the crust is as high as 60%. The source is very wide, and so is the alien world.

In addition, a large number of by-products, including but not limited to sodium, calcium, silicon, potassium, barium, and many isotopes, have been obtained by using magic energy furnace.

However, sodium and calcium are still valuable on earth. Take sodium as an example, it needs to be made by electrolysis method on earth, which leads to high energy consumption and high price. It costs tens of thousands of soft coins to produce a ton of metal sodium.But in the tide collar, as soon as the magic power decomposition method is opened, there will be as much sodium metal as you want. It''s a lot cheaper. How cheap is the price?

It is cheap enough to be used for mass production of caustic soda, namely NaOH.

As the most important chemical raw materials, caustic soda, one of them, is solved in this unexpected way.

There is absolutely no fool on earth who will use this method to make caustic soda. Even if he does, the price will break through the sky. Who can afford the caustic soda that costs dozens of yuan per kilogram?

This kind of wonderful "sodium to alkali method" can only appear in the alien world.

With caustic soda, soda (Na2CO3) is a small thing. It''s enough to pour carbon dioxide (CO2) into caustic soda solution.

Caustic soda and soda are widely used. Caustic soda can be used to make paper, soap, dye and rayon.

Soda ash has more uses. One of its main uses is glass. It can also be used in the food industry, such as steamed bread and bread. Adding the so-called alkali noodles into flour can neutralize the sour taste produced during fermentation, which can greatly improve the taste.

The effect of the combustion bottle is surprisingly good.

Every time they see a wooden house, the team members will take out three or four burning bottles from their backpacks, smash them on the surface of the wooden house, throw a few torches, and the fierce fire will start instantly.

Thanks to the characteristics of light oil, the burning speed is very fast. Combined with the effect of thermite, the heat released is also amazing. Standing 6 or 7 meters away, you can feel a strong burning sensation.

With fast burning and high temperature, other parts of the wooden house were ignited quickly, and then the flame spread to more places. The whole wooden house soon became a giant torch, and the flame tongue rose more than 10 meters high.

Then, with the help of the wind, the flame tongue licked the neighboring wooden houses and ignited them. The fire turned into a sea of fire.

Watching the wooden houses devoured by fierce flames, listening to the shrill howling from the house, and the crying of children in horror, occasionally there are black orcs on fire rushing out of the wooden houses, the scene looks extremely cruel.

However, none of the arsonists expressed sympathy, and many of them showed obvious pleasure.

The crimes committed by the black orcs on this land are clear to all. The worse the black orcs are, the more happy they feel.

Even the aborigines who knew little about the black orcs on the Haichao islands, after learning about the tragic experience of human beings on the mainland, also hated the black orcs from the bottom of their hearts.

Since the black orcs invaded the human kingdom and wiped out the human beings in this continent by means of genocide, both human beings and the black orcs were doomed to fall.

Either humans die, or black orcs die, there''s no second possibility.

During this period, it was not that there were no black orcs trying to stop this "evil behavior". The black skins of the tribe also organized several counter attacks, but this practice had no effect except to send their heads.

Under the volley of magic air gun, they could not even get close to the island protection team within 50 meters. Every time they rushed to half the distance, the black skins could no longer bear the heavy casualties. They turned around and left their bodies on the ground.

After more than 100 team members of the island protection team strolled around the village, the whole village was completely surrounded by a sea of fire, and the thick smoke drifted away with the wind, tinting the vast sky halo with a trace of ink. Even under the cover of flying snow, this scene can be seen more than ten kilometers away.

In fact, this kind of crazy arson method is quite a waste of suspicion.

Although there are many poor people in this black Orc tribe, the black crown and warrior class in the tribe have a lot of wealth. There must be many valuable items in their family, such as all kinds of gold and silver items, or gold and silver coins of the black ORC.

Unfortunately, in order to be in a hurry, the island protection team has no time to go door-to-door searching, because no one knows how fast the reaction speed of other black Orc tribes is.

Before evacuating, the island protection team has one last thing to do - to save human slaves.

The camp for human slaves is located in the southwest corner of the village, more than 400 meters away from the village.

At the beginning of the plan of action, people thought that the black orcs would directly distribute human slaves to the Black family. If so, it would bring great trouble to the rescue of slaves.

But to everyone''s surprise, instead of doing so, the black orcs chose to use human slaves together.

When people go from house to house, they can see that some of the real slaves are set on fire in the shabby houses.

After coming to the front of the camp along the snowy path, we only had a look, and everyone felt that the slaves were really miserable.

The shacks in the camp are generally very low. The height of the shacks is only one person high, including the roof. They can''t even stand upright inside. The external walls are adobe walls, and the roof is a mess of wooden boards.

In such a cold winter, the temperature inside the house is not much higher than that outside, and it is not known how these human slaves survived.The smell in the camp is not very good, even the whistling cold wind can not completely clean up the residual smell, and the team members can still smell a faint odor.

It''s no shame to say that this camp is no different from the barn.

There was a thick wooden fence around the camp, and there were several watchtowers around. There was no one in the sky above these watchtowers. It was obvious that the black orc, who was guarding the slaves, had run away.

By this time, the slaves had realized that something had happened. In the huts, their heads were peering behind the door, looking at the scene outside the camp.

"Ladies and gentlemen, we are the island protection team led by the tide. We are ordered by the Lord to rescue the human race..."

Muse''s voice spread all over the camp in an instant, and then, with his signal, the island guards also yelled in unison.

"We are the island protection team led by the sea tide. Under the order of the Lord, we come to rescue the human race..."

……

In the repeated shouting, one by one ragged slaves hesitated to open the low wooden door, walked out of the shack and looked at the island guards through the fence.

When the number of slaves gathered in the open space of the camp approached 300, an island guard stepped out of the crowd, took off his helmet and pushed open the gate of the fence.

In the "creak creak" sound of the wooden door turning, he slowly walked into the camp.

Facing the eyes full of expectation, desire, doubt, fear and other emotions, he took a deep breath and cried out.

"Everyone, you are free!"