Lin Dong went to the Red River Valley alone.

The terrain of the Red River Valley had last been stored in Jarvis's database, so he was quite familiar with the terrain here.

After the last fight, the number of fierce beasts in the Red River Valley has decreased significantly, and there are no more large groups of fierce beasts, only occasionally encountering groups of fierce beasts. However, for the current Lin Dong, it is effortless, and it is basically a second kill.

It only took half a day for him to come to the mouth of the fire cave in the inner valley and enter the fire cave without hesitation.

Not long after Lin Dong entered the fire cave, more than a dozen heads appeared on the top of the mountain thousands of kilometers away.

More than a dozen people have a fiery red wing tattooed on the left side of their face. They don't look like Yuan Yangguo clothes. Among them was the first one, wearing a large hat on his head, and his face could not be seen clearly.

A person next to him asked: "Boss, wouldn't that kid just now also come here for the nuclear mine? The nuclear mine here is very secret, and few people know about it." It took a lot of trouble for us to find it. How could anyone else find out?"

"Who knows, maybe that kid isn't here for the firecore. Another said.

"We have previously proved that there are three batches of fire core mines here, with a total of 36 fire cores. We have mined two batches before, and now we have the last batch of ten fire cores. I didn't expect this kid to suddenly appear. Judging by his strength in killing those fierce beasts, he should also be a beginner-level innate martial artist. ”

"What are you afraid of at the beginning level, the head is still a mid-level innate martial artist, plus stinky feet and rotten hands, both of them are beginner innate beings, and they are afraid that they won't be able to deal with this kid?"

At this time, the man with a hat, who had not spoken, spoke: "The third batch of fire cores is in a very bad environment, and we have not been able to mine them twice before. Now this kid is going, purely to send him to death. ”

"What if he actually mined it?" asked one.

"That's better. The man sneered, "It will save us a lot of trouble." ”

When the others heard this, they all had smug expressions on their faces.

"Go down and follow the boy. But don't get too close, looking at his appearance, he seems to feel very keen, and movement can be observed within a kilometer. So be very careful. ”

"Knowing the boss and hiding his whereabouts is not our forte. ”

At that moment, more than a dozen people, all along the mountain wall, jumped down in a few flashes.

......

Let's say that when Lin Dong entered the cave, he did not walk along the big hole, but walked towards a fork in the road.

After a few moments, we reached the end of the fork in the road.

On the wall of the cave at the end of the fork, a large hole with a diameter of three meters appeared, and in the hole, a fiery red light was revealed. The temperature also rises dramatically.

This is the hole that Lin Dong inadvertently opened when he fought with the Bai Family Elder Patriarch last time.

Lin Dong took out the armor, put it on his body, and glanced at the energy of the armor, only 28% remained.

Activated the Foot Thruster and flew into the cave, heading towards the lava beneath the cave.

As the altitude drops, the temperature gets higher and higher, and the energy of the armor climbs rapidly.

38%......

48%......

58%......

When Lin Dong was only five meters away from the magma, and the magma bubble below exploded and could splash on the armor, the armor's energy finally reached 400%.

Only then did Lin Dong fly away from the magma and come to the cave mouth above.

He pulls out the map, turns on the spotlight on the chest X-ray, and scans the map into a database.

"Jarvis, how far are we from the pyromeric mine now. Lin Dong asked.

"Master, according to the map, the distance in a straight line should be five thousand meters. However, the cave is constantly changing direction, so the true distance is not certain. ”

Turning off the spotlight and putting away the map, Lin Dong said: "According to the map, set a nearest route to fly over." ”

A map immediately appears on the helmet display, on which a route is marked. Then Jarvis activated his foot thrusters and flew forward quickly.

Now that there is magma as an energy source here, Lin Dong doesn't have to worry about running out of energy.

With a distance of 5,000 meters in a straight line, Lin Dong flew in the cave for more than five minutes and circled for 15 kilometers before he came to his destination.

Looking ahead, I saw a lava river in front of me, and above this lava river, there was lava flowing down like a waterfall.

The fire core mine marked on the map is behind the magma fall.

When ordinary people come here, it is impossible to find that there is a fire core mine behind the magma waterfall.

Lin Dong said to Jarvis, "Scan the back of the magma waterfall. ”

Jarvis quickly gave the result: "Master, there is a hole behind the magma waterfall, and the fire core mine is in the hole. ”

When Lin Dong heard this, he was overjoyed and said, "Then what are you waiting for, let's go mine now." ”

"But master, there is a powerful demon beast in the cave behind. It should be a second-order demon beast. ”

Lin Dong couldn't help but be a little speechless.

Doesn't it mean that there are only fierce beasts and no demon beasts in the Red River Valley?

Even if it's a demon beast, it's still a second-order demon beast.

In fact, with Lin Dong's current strength, if he put on armor to deal with a second-order demon beast, even if he couldn't kill it, he could evacuate safely. But the problem is that the environment here is too harsh. Although armor can withstand high temperatures for a short time, it will not work for a long time.

It seems that there is some trouble in mining this nuclear mine.

In desperation, Lin Dong gritted his teeth and said, "You have to try everything, it's really a big deal to escape again." Jarvis, rush into the lava falls. ”

The next moment, the thruster on the back of the armor changed direction and rushed towards the magma waterfall with Lin Dong at great speed.

With a loud sound like a stream of water, Lin Dong broke the magma waterfall open a big hole and flew into the magma cave.

Behind Lin Dong, at some point, more than a dozen figures quietly appeared.

One of them whispered: "Boss, what kind of person is this kid, not only can he fly, but he also has a strong resistance to magma, so he flew into the magma waterfall!"

"It seems that this kid is not an ordinary person. The other martial artist also exclaimed, but soon a playful look appeared on his face again, "But the second-order demon beast inside is probably enough for him to drink a pot."

"It seems that we underestimated this kid, stay with him, be careful. The hat man said.

Let's say that Lin Dong flew into the magma waterfall and looked around, only to see that the walls around this magma cave were all fiery red stones. The ground in the cave was covered with magma, as Jarvis said, like a lava lake.

And on the roof of the cave, there is also magma falling down from time to time.

Lin Dong sighed in his heart, no wonder no one mined the fire core mine here. First, the fire core is of little use to ordinary martial artists, and second, the environment here is too harsh. Even if the innate martial artists come here, I'm afraid it will be difficult to survive.

At this time, Jarvis gave a three-dimensional simulation of the cave and said: "Master, the cave is three hundred meters long, and the fire core mine is in the deepest part. But that monster beast is also in the deepest depths. ”