The other end of the string is tied to a trigger.

The trigger device consisted of a spring trigger, a firing pin and a primer removed from the bullet.

As soon as Susie pulls the rope, the firing pin attached to the spring is released, striking the primer, igniting the gunpowder filled with the device.

Light an open flame in a passage covered with barley smoke and the consequences can be imagined.

Susie and the others had been a short distance away from the dark passage, but when the light of the fire lit up, a violent shockwave sent all three of them flying.

"Boom!" The deafening explosion shook the entire underground world, and everyone in the gathering place was startled.

Mamba felt his brain buzzing, and when he opened his eyes, he saw that the world was spinning, and he struggled for a long time without getting up from the ground.

A piece of Barr was no better, and the father and son just threw themselves on the ground and lay their corpses.

When Susie pulled the rope, she was prepared to defend against the impact in advance, and she was the least affected by the ball, but she was also blown up and sore all over.

Looking at the "individual monitoring watch", the little green man on the LCD screen has now turned yellow-green, but fortunately, her injuries are not very serious, and she climbed upright.

"Susie! Mamba! Barr! The other members of the gathering place hurried over, and they had only heard Mamba say that they would make a trap to deal with the dark invasion, and no one expected such a big move.

Susie rubbed her head and grabbed Ena who was supporting her: "You take care of Mamba and Baal, Ena, help me to the other side of the passage." ”

In a pungent smell of burning, Ena and Susie craned their heads to look at the place where the explosion had occurred.

What used to be a dark passage was now filled with smoke, choking both of them with coughs.

"The darkness is illuminated!" Ena pointed to the top of the passage and exclaimed, "Bishop, our method has worked!" ”

Susie nodded: "That's right, the light strip that was extinguished before is back on, it seems that the source of the darkness has been destroyed, let's go over and see what it is." ”

However, as soon as the two of them were about to take a step forward, a voice sounded in their heads: "Stop......"

……

Tang Hao stopped the two of them from dying, the dust explosion was enough to consume all the oxygen in the passage, and when they entered the passage, it was really an old birthday star hanging themselves - it was a long life.

Using the method of dust explosion to deal with the enemy hidden in the darkness was the only possible solution that Tang Hao could come up with in combination with the materials that could be found in the gathering place.

In terms of results, it is also in line with his expectations.

Hundreds of kilograms of flammable powder, which is fully mixed with air inside a relatively sealed channel, ignites with a power comparable to a bombshell.

Judging from the temporary explosion results, at least the inexplicable darkness has been completely dispelled, and the previous shielding effect has also been lifted, and Tang Hao can now explore the inside of the passage normally.

Inside the passage, there was unburned barley coke everywhere, and Tang Hao enlarged the screen and began to look for what he wanted in it.

At first, Tang Hao didn't find anything abnormal in the passage, there was nothing here except black smoke.

Soon, Tang Hao noticed that there seemed to be something wrong with these black smokes.

After the explosion, the smoke that had been rising gradually precipitated, and a layer of black dust was spread on the inner wall of the passage, Tang Hao focused his attention on this layer of dust, and the item information was quickly displayed.

"Type αII Photosensitive Nanomachinery (Destroyed)".

These objects, which look like ashes, are actually nanomachines.

Self-propagating nanomachines, this futuristic machine that has only appeared in science fiction works, Tang Hao is no stranger to them.

In many novels and films, the power of nanomachinery is shown, nanoarmor that can be repaired by itself, and factories that can assemble weapons on their own.

As for how terrifying runaway nanomachines are, the sci-fi community even has a special term for them - Gray Tide.

Those nanomachines can devour everything, and then make the decomposed materials into new themselves, countless nano-sized von Neumann machines, destroying one world after another.

The nanomachines in front of me, which were destroyed in the high temperature of the explosion, may not be as harmful as the same kind in science fiction works, but for humans in the underground world, they are already very terrible hazards.

Fortunately, Tang Hao already knew their weaknesses, so if he encountered a dark area in the future, he would have a way to concoct them well.

……

Mamba and Barr were blown up and lay down for a while before relieving themselves.

"How's it going? How are those dark areas now? As soon as Mamba came to his senses, he grabbed Lias's hand and asked.

Lias nodded, "It worked, the explosion dispelled the darkness, and the light strip returned to normal." ”

Barr rubbed his head and said, "That explosion just now...... Is it really caused by flour barley? How can these foods be so powerful? He couldn't have imagined that the so-called trap would be such a big explosion.

Mamba sighed, "This is the power of knowledge, and the Lord has revealed a little bit of knowledge to us that it is enough to make such a terrible weapon." ”

Susie put on the two of them on the "individual monitoring watch", looked at their yellow and red bodies and said, "You are both injured very well, don't move, Fran is not here, you have to take care of your injuries." ”

The Mamba held on and asked, "Does the Lord have any new instructions?" Those monsters in the dark, were they blown up? ”

Susie shook her head and said, "The Lord will not let us enter the passage for the time being, and as for what is hidden in the darkness, we will not be able to enter it until the smoke has completely cleared." ”

After another day, the situation in the passage had completely stabilized, and after receiving permission from the "Lord", Susie cautiously entered the passage of the explosion.

The violent explosion caused many cracks in the walls of the passage, but the light strips above the head were not affected by the explosion, and it seems that these light strips are indeed very strong.

In the passage, Susie only found unburned barley and black dust scattered everywhere, and did not see the imaginary monster.

However, as an "engineer", Susie still has some professional intuition.

She reached out and touched the black dust that had spread through the passageway, the hardness of which surprised her.

It's not burning ashes, Susie can be sure.

"Could it be that these black substances are the culprits that cause darkness? Extinguished strips of light, devoured lives, whispers and murmurs, all caused by these tiny dusts? ”

Although this idea is very contrary to common sense, Susie's guess is not far from the truth.