Smoke with smoke!

That's right!

Li Yan saw the gray smoke coming out after the torch flashed, and suddenly had an idea and thought of this way!

Living things need to breathe, and smoke is poisonous!

As long as the smoke is used, the dead rats will definitely come out, and they will have to pass through the fire, and in the state of being burned, the power of these grandsons will be greatly reduced.

In this way, he can't "wait for the rabbit" at the entrance of the cave and rape ...... Oh no, is it a corpse?

No matter how bad it is.

Even if there is more than one exit from this cave, and he can't keep it, the horned sac rat will have to come out of the other holes anyway.

When the time comes, whether you kill in the jungle or choose to enter the cave first, at least it will be better than the current situation!

"That's it!"

After finalizing the attention, Li Yan smiled "hehe", immediately took out the stone axe from the dimensional space, and began to decompose the surrounding trees and wild grass.

As for the turtle immortals, they didn't get a break, and they were also caught by him as a "strong man", responsible for collecting various plants.

It is important to know that the production of smoke is caused by the insufficient combustion of substances and the production of a large amount of graphitic carbon.

Even if Li Yan doesn't watch the wilderness video, he knows that he needs to add a lot of fresh plants to the fire and use the water in the leaf veins to make the flame not burn sufficiently.

The area of this underground cavern is too large, and it requires a lot of burning materials and plants.

Fortunately, the cave is on the hillside, surrounded by ancient trees and plants.

Materials can be sourced locally.

Li Yan used alchemy to break down a large amount of wild grass and wood, and then broke down the wood into wooden sticks one by one.

In comparison, the speed is still much slower than using a woodworking table.

But there is no way, the woodworking table is too big, and one cubic dimensional space can't fit at all, and it's too much of a loss to synthesize on the spot, after all, it needs a level 2 fragment.

As for the reason why he broke down the sticks, it was because he wanted to make a hundred square meters of thatched planks!

Yes!

The length and width are all ten meters!

Li Yan is going to use this wooden board to cover the hole!

You must know that the temperature inside the cave is lower than that outside the cave, and between the two, a pressure difference will be formed, and the air will flow between two points with different pressures, and wind will be generated!

Unfortunately.

The air at the entrance of the cave flows from the inside out.

Therefore, when Li Yan first entered before, he would feel a faint cool breeze.

That's why he made thatched planks.

If you don't use anything to block the entrance to the cave, then this weak flowing air flow will prevent the smoke from flowing into the cave, and even float out completely, which is equivalent to losing all your efforts.

As for why thatched planks were used, and not wooden walls.

On the one hand, the latter is too expensive to use, and it is far more time-consuming and laborious to break down wood than thatch.

On the other hand, the thatched planks are light, and Li Yan can at least barely move them, and he can also fine-tune them.

But with a hundred-square-meter wooden wall, even if he opened the alchemy fury skill, it was enough to move a little.

Gathered all the materials.

It probably took Li Yan nearly two hours.

Now, the sun has begun to set in the west, indicating that the afternoon is halfway over.

He smirked and went into the cave, and stood in front of a hill-like pile of timber and plants, rubbing two pieces of flint back and forth against the dry thatch at the bottom.

Seeing the cave inside, the bright white sparks twinkled and flashed.

After a while, a few wisps of orange-red sparks began to ignite in the pile of materials, and soon, just like "a spark can start a prairie fire", several flames burst out.

Li Yan blew lightly on the fire a few times, and when the fire became bigger, he immediately took a small thatched wooden board as a big fan and fanned the fire.

With the flow of air, oxygen will rush into the fire faster.

Gradually, the entire cave was illuminated.

He only felt a wave of heat hit him.

As the bottom layer of the fire burns violently, the plants piled on top begin to wither, and a large amount of liquid flows into the bottom burning, plus the cap of the plant layer.

In the next second, bursts of gray-white smoke came out.

"Ahem, ahem, ahem......"

Li Yan covered his mouth and coughed a few times.

Seeing that "great things have been accomplished", he hurriedly drilled out of the opening of the cave and pushed the thatched planks well, leaving only a small slit to bring in oxygen and keep the fire burning.

That's right.

The entire entrance to the cave had been covered by a large yellow-green thatched plank.

It's also thanks to Li Yan's alchemy, if an ordinary person wants to gamble on such a big hole, it will take at least a few days!

Next.

Li Yan followed the dinosaur team to a fern bush under the valley and laid an ambush.

Then, he took out a wooden bow and stone arrows from the dimensional space, and waited quietly for the "experience baby" to come to the door.

But this waiting process is a little long.

Half an hour passed, and he didn't hear anything near the entrance to the cave.

That's not right!

His deliberately left slit, to this day, there is still a lot of white smoke coming out, indicating that the method has been working.

Could it be that there is another exit from the cave?

Just when Li Yan gradually lost his patience.

Suddenly, a "squeak" sound came from near the entrance of the cave.

In the next second, the thatched plank immediately "clicked" and shook a little.

Something creature was digging into the gap he had left behind!

It's a horned gobladder!

As the gap widened, a small head with two sharp horns came out, it was the ancient rodent creature that had attacked him before!

"Sample, let you bite me, a song "Cool Cool" for you!"

Here, Li Yan teased, immediately pulled the bow and strings, and with a "boom", the arrow was shot.

Poor horned ground rat with its fur burned to the ground, obviously desperately through the fire, this just out of the hole, immediately by a black shadow, shot through the mandible!

It's a stone arrow!

Hit!

The ambush site he chose was exactly 15 meters away from the entrance of the cave.

And with the actual combat honing these days, his archery skills have improved a lot, and the hit rate is much higher than before!

"Squeak ——!"

Just when Li Yan had just shot the horned gossaic rat.

The next moment, another dead mouse came out.

He hurriedly drew his bow again.

Unexpectedly, more and more horned rats appeared from the hole, and in the end, they even squeezed the cracks and tore the thatch planks directly.

You know, for these horned gobss that dig diamonds all year round, biting a thatched plank is as easy as cutting tofu with a knife!

"The horned sac rat (level 4) has been severely injured and stunned by you, the host can use the carnivorous domestication ball to domesticate it!"

"The horned sac rat (level 3) has been knocked unconscious by your serious injury, the host can use the carnivorous taming ball to domesticate it!"