Once the hard bark of the tree is cut, it secretes a burning oil that is the original source of fuel for the sac-like organs of the fire beast.

Because, through later observations, Lin Luo found that on the poles of the very Nan trees, you can see many claw marks and bite marks left by fire beasts in order to obtain fuel.

It is by sucking the sap of the nanshu, storing it in the sac-like internal organs, and then reacting with some secretions in the body, the fire beasts eventually become a flammable fuel like gasoline.

In addition to relying on the tree for fuel, the fire beast only operates in the area of the Nanshu forest, mainly because the bark of the Nanshu tree is hard, and it is extremely difficult to burn under the scorching flames.

In addition, the leaves only turn yellow and fall before the dead season.

This allows fire beasts to spit out flames without fear of the flames causing fires and destroying their homes.

However, the bark of the tree is extremely difficult to ignite, but the sap is a fuel that can be combusted, and plants like Nanshu really make Lin Luo have to sigh the magic of nature in his heart.

"The oil lamps used to make lighting should be fine, right?"

Looking at the blazing bonfire, Lin Luo couldn't help but whisper to himself.

The reason why he wants to explore the secrets of the fire beast is not only to satisfy his curiosity, but also to be interested in the fire fuel that the fire beast spouts.

In this world, there are only a few lighting tools like fluorescent stones, and the only main lighting tool at night is a campfire.

To burn a bonfire, it is necessary to use a lot of wood, which requires a lot of young and strong labor to cut down the wood.

Therefore, if there are lighting tools such as oil lamps, it will undoubtedly greatly reduce the consumption of wood, and it will also save a lot of labor for the tribal alliance.

It is precisely because of this that Lin Luo is so concerned about this matter.

From the current point of view, the oil that has just flowed out of the Nanshu tree is relatively stable when burned, and it is not very volatile.

Therefore, although Lin Luo was not 100% sure, those oils were definitely suitable for making oil lamps.

But at least, I still have eighty percent certainty in my heart and am quite confident.

And this is undoubtedly a surprising unexpected gain for Lin Luo.

"Zixiao, let's go, let's go!"

Soon, after extinguishing the bonfire, Lin Luo turned over and rode onto Zixiao's back, ready to continue his exploration.

As for the matter of Nanshu oil, Lin Luo didn't consider this Nanshu forest in the dense forest at all.

After all, this woodland is in a dense forest, and it is not yet an area on the edge of the dense forest, so it is too dangerous to come here to collect nanshu oil.

What's more, in this Nan forest, there is a terrifying pure-blooded fire beast among the living fire beast clan.

Therefore, Lin Luo planned to wait until he returned to Menggu and asked Chief Zhu to send people to other places to look for Nanshu.

After all, the tree doesn't just grow in dense forests, but also in jungles outside of dense forests.

Although the number is relatively scarce and it takes a little time to find, it can undoubtedly greatly improve security in comparison.

......

Five days later,

"Brush!"

Feeling the sound of the wind whistling in his ears, Lin Luo's eyes looked ahead, his face full of excited smiles.

Now, he has finished his exploration of the dense forest, and is now on his way back to the valley.

As for his exploration this time, on the whole, it was relatively smooth, he found several targets that could be hunted, and he also planned a relatively safe route.

With this understanding, the next time they go into the depths of the dense forest for joint exploration, they will be able to save a lot of trouble.

"Finally home!"

Soon, looking at Menggu gradually coming into view in the distance, Lin Luo whispered to himself with a smile on his face.

"Lin Luo, you're back!"

And on the sentry tower at the mouth of the valley, the soldier in charge of the sentry also quickly spotted Lin Luo and greeted him loudly.

"Hmm. ”

Lin Luo smiled and nodded, and asked, "Has anything happened in Menggu recently?"

"Yes, the guardian spirit of the Deer Clan broke through three days ago. ”

Hearing Lin Luo's inquiry, the soldier who greeted him immediately replied with excitement on his face.

Elk Spirit broke through?!

Hearing this, Lin Luo's face suddenly showed a surprised expression.

However, it was soon relieved.

After all, unlike the breakthrough of the Purple Bamboo Spirit, the strength of the Elk Spirit was only at the level of a Hybrid Fierce Beast, and the difficulty of the breakthrough naturally could not be compared to the Purple Bamboo Spirit.

In the previous hunting process in the depths of the dense forest, in addition to hunting several pure-blooded beasts, they also collected a lot of alien grass spirit plants.

When he invited the Elk Tribe to join the Tribal Alliance, Lin Luo had promised that the Deer Clan could use the flesh and blood of the fierce beast to trade the Alien Grass Spirit Plant with the other two clans.

Obviously, in order to allow the elk spirit to break through as soon as possible, the deer chief must have traded all the harvest he allocated this time into the collected herb spirit plants.

This allowed the elk spirit to successfully break through to the level of a pure-blooded fierce beast in such a short period of time.

And this is undoubtedly a very good news for the tribal alliance.

"That's great. ”

Lin Luo replied in a good mood, and after saying goodbye to the warrior, he rode Zixiao into the League Valley.

In the valley of Meng, it is still a lively scene, and all the clansmen are busy for the upcoming death season.

If you look at the valley from the mouth of the valley, you can see that the potatoes and white grains of the second season are growing in the growing area.

In just over two months, towards the end of the dry season, the harvest will be ready again.

As for those transplanted from the wild, those plants that can bear all kinds of fruits have also been deleted, and some plants with high planting value have been retained, and they will be planted more in a more planned way next year.

On the other side of the breeding area, the deer clan is also very well managed, and you can see that the various herbivorous beasts that are tamed in captivity in the fence are in groups, and they are already beginning to take shape.

"Let's go get some rest!"

Turning over and getting down from Zixiao's back, Lin Luo patted Zixiao's head and said.

"Roar!"

Hearing this, Zixiao immediately let out a low roar and ran towards the direction of the cave where it lived.

After watching Zixiao leave, Lin Luo also walked towards the Menggu with a smile on his face.

This time, counting the time spent hunting, Lin Luo had been away from Menggu for almost half a month, and he missed the child very much.

Of course, I also miss my mother.

However, just as Lin Luo walked towards the valley full of excitement and anticipation, a voice full of surprise suddenly sounded behind him.

"Luo, you're back!"