boom!

As the large iron gate at the cave entrance fell, the entire cave was sealed.

Xu Wen and Mi Feng looked at each other in confusion.

"Depend on!"

Mi Feng reacted and was the first to rush towards the cave entrance.

As a result, I pushed the iron door hard and found that it was indifferent.

"Ahhhhh!"

Mi Feng used all his firepower and even activated the golden light curse patterns on his body, but he still couldn't shake the iron door.

Xu Wen looked at Mi Feng like an idiot.

At this time, Mi Feng also felt Xu Wen's eyes and couldn't help shouting at Xu Wen.

"What are you looking at? Why don't you come over and help?"

After hearing this, Xu Wen was speechless.

"Do you think it's useful?"

"That iron door is at least one meter thick. It must have been used to imprison this spider monster."

"If Xiaoying's power is not sealed, it may still be able to be opened."

"It's a pity that half of Xiaoying's power has been sealed."

Xu Wen is obviously self-aware.

Now even if he and Mi Feng join forces, they probably won't be able to open the iron gate.

"Then what should we do? Are the two of us just waiting to die inside?"

Mi Feng saw the poisonous gas spreading around him and became anxious.

If it continues like this, the two of them may really not be able to get out.

"Don't be impatient. There's no point in being anxious at this time."

In this situation, Xu Wen was obviously much calmer than Mi Feng.

Mi Feng just behaves very coldly at ordinary times.

The surrounding poisonous gas was slowly pouring into the cave. Xu Wen smelled it and found the smell of hydrogen chloride.

"It's hydrogen chloride."

"If you inhale too much, you will suffocate, but it is denser than air, so it will slowly spread upward from the ground."

After Xu Wen finished speaking, wings suddenly sprouted from his back, then fluttered and flew up.

Seeing Xu Wen flying into the air, Mi Feng also wrote two gold charms and pasted them on his feet.

Immediately afterwards, he stepped on the stone wall and walked up.

"At this rate, we still have at least four or five hours."

Xu Wen kept pouring poisonous gas into the cave.

Fortunately, the cave was big enough, giving Xu Wen and the others some buffering time.

"This is not the way to go."

"I can enter the fetal breath state without breathing too much air. But you only have four hours, so think of a way to escape quickly!"

Mi Feng is a practitioner, and practitioners naturally have ways to deal with this situation.

The ability of fetal breath can put oneself into an extremely slow metabolism.

Slow down your breathing, so you don't have to rely too much on breathing. This poisonous gas will not have a great impact on Mi Feng.

But Xu Wen was different.

Xu Wen is an ordinary human being, he needs to breathe.

If he did not escape from here in time, Xu Wen would definitely suffocate to death due to excessive inhalation of hydrogen chloride.

So it is Mi Feng who is not in a hurry now.

Seeing Mi Feng's proud look, Xu Wen remained very calm.

As time passed by, the poisonous gas had covered most of the cave.

Mi Feng had already entered fetal breathing mode, hanging on the cave ceiling like a bat, silently closing his eyes and starting to breathe.

Xu Wen, on the other hand, was flying in the air, observing the situation in the entire cave.

In fact, Xu Wen has been thinking about it since just now.

He was recalling every step he took after entering the Dongshan Mine, every turn he took, and every entrance he entered.

Xu Wen tried hard to recall, copying the entire mine's context in his mind.

Then combine it with the terrain of the entire mine.

Finally, the location of the cave where they were located was located.

…

"Lao Xu, this is the map of Dongshan Mine you want."

"It's not easy to do this!"

…

Xu Wen recalled the detailed geographical map of Dongshan Mine that Gou Fugui was given before he came to Dongshan Mine.

Pictures began to overlap in my mind.

"The mine elevator went down about 250 meters, so the altitude we are at now should be 236 meters."

"This altitude is exactly the same as the Huanghe River."

"And there happens to be a Yellow River basin to the west of Dongling Mountain where the Dongshan Mine is located."

"This mine is not meant to be dug, but a natural cave."

"This area is a karst landform, and natural caves like this are very common."

"Calculated according to the direction of the underground river in Shanjiang City and the veins we are walking in the underground mine..."

…

"Hey, what have you been mumbling about?"

"You don't have much time."

Mi Feng's impatient voice came from the side.

Xu Wen has been whispering since just now.

Obviously, Xu Wen has found an idea.

Suddenly, Xu Wen flapped his wings and flew towards one of the cave walls.

He groped along the cave wall for a while, then looked at the water stains on his hands.

"That's it!"

Xu Wen suddenly said to the cave wall in front of him.

After hearing this, Mi Feng immediately woke up and asked quickly.

"What did you find?"

After hearing this, Xu Wen pointed to the stone wall in front of him and replied.

"Behind this stone wall is the Huang River."

Mi Feng suddenly became energetic.

"Huanghe? How do you know?"

Xu Wen replied calmly.

"reasoning!"

"Can you deduce this?"

Mi Feng looked at Xu Wen in shock and said.

The corners of Xu Wen's mouth raised slightly, but he just smiled plainly.

"The thickness should only be about four meters."

"Breaking through this should be easier than breaking through a meter-thick iron door."

After Xu Wen finished speaking, the dark energy on his body condensed into a spear.

Then, Xu Wen slammed the spear against the stone wall.
To be continued...