Hearing that the earth element nucleus crystal of the earth spirit beast originally came from the king of the earth, everyone suddenly realized it.

No wonder the earth spirit beast was originally a human-earth beast, but now it is completely different from the human-earth beast. It turned out to have been transformed by the underground king.

"In that case, this underground king is still a great good person." Lan Fengyuan joked. After all, if he had obtained the earth element core crystal, he would naturally not give the element core crystal to a monster like this.

"I'm afraid it's not that simple..." Longfeng Beast's heart moved and pondered.

Because when he was in the "wilderness and desert", Lin Yun found that the number of "storage beasts" released by the earth spirit beasts was very large, and the immortal energy and life breath collected in one day were enough to provide a large amount of life. body.

And such a majestic celestial energy and breath of life, the earth spirit beast alone cannot absorb it.

So there is only one possibility!

The "storage beasts" released by the earth spirit beasts, these collected immortal energy and life aura, are actually all supplied to this underground world.

This is why, when Lan Fengyuan asked why the underground world could still maintain billions of people in millions of years, the dragon and phoenix beasts would think it was the reason for the earth spirit beasts.

The dragon and phoenix beast said his thoughts, and Lin Yun slowly shook his head and said, "You are only half right."

half?

Everyone stared with big eyes and small eyes, and finally all their gazes fell on Lin Yun's body, waiting for Lin Yun's explanation.

Lin Yun said in a deep voice, "Actually, the immortal energy and life aura collected by the earth spirit beasts are not for the entire underground world, but for the underground people under the command of the underground king."

"Because of the radiation of the earth's nuclear energy all the year round, the life span of the underground people is not long, and the life and immortal energy collected by the earth spirit beasts can at least allow the underground people under the underground king to have a certain lifespan. "

"After the second time, the Underworld King allowed this group of underworld people whose lifespan to be increased, as "breeding pigs," to reproduce a large number of offspring. "

Everyone was a little bit dumbfounded. If it was exactly what Lin Yun said, then using the word "breeding pig" would indeed be more appropriate.

After all, in the underground world, there are also men and women. I am afraid that the methods of fertility of underground people are no different from human beings.

Because lifespan has been increased, it can continue to reproduce for a long time. This is also the reason why the underground world can still maintain billions of people.

At this moment, Lin Yun suddenly said: "But I think that breeding offspring is not the real purpose of the Underworld King."

Everyone fell silent, and Lin Yun continued: "These underground people who have received the fairy aura and the breath of life, together with the next generation they bred, will adapt to the richness of the fairy aura and the unique breath of life on the ground in advance. "

"If my speculation is not wrong, the Underground King is no longer willing to continue to live in this underground world. He wants to return to the surface world."

Lin Yun's guess caused everyone to take a breath.

"Does he want to go to war with humans on the ground?" Dr. Biology, who had rarely spoken before, couldn't help but exclaimed in exclamation.

Lin Yun nodded, other than that, he couldn't think of other reasons.

Moreover, judging from the memory of this underground man, the underground king of the half-step martial emperor realm is by no means a good kind. His cruel heart has caused dissatisfaction among many underground people.

The ruins where they are now, used to be inhabited by a large number of underground people, but those underground people, because they rebelled against the rule of the underground king, they were all slaughtered.

Originally explored a whole new world, coupled with the ability to catch the earth spirit beast, made everyone very excited.

But now that Lin Yun's words came out, everyone's mood became extremely heavy.

"Lin Yun, can't you catch the earth spirit beast?" Lan Fengyuan wanted to shrink back. After all, whether the earth spirit beast could be caught, in fact, it didn't make much sense to him.

The Underground King was a half-step martial emperor, and they didn't have any chance at all.

Lin Yun thought about it for a long time, and was also ready to give up this opportunity.

Because with his current strength, it is simply not enough to challenge the half-step martial emperor.

What's more, in this entire underground world, there are not a few underground people with martial arts strength.

It can be said that the underground world today is not like a force, but like a whole world.

Lin Yun will consider the pros and cons. Although the soil element core crystals are indispensable, they are not necessary now.

Under the blessing of the Underworld King, the earth spirit beasts will not have much problem, as long as their strength grows to a certain level in the future, they will come back and take away the earth element core crystals.

"In that case, let's go back first. It is not advisable to stay here for a long time." Lin Yun quickly made a decision. Since he has decided not to entangle here, he should leave as soon as possible.

Just when everyone was about to leave, Lan Fengyuan stopped. He wanted to take the underground man back to do research.

Lin Yun said straightforwardly to him: "There is no need. The so-called survival of the fittest, they are able to absorb the energy of the earth's nuclear purely because they have lived here for long enough and need to survive, which led to the evolution and mutation."

"I have just explored it with divine consciousness, and their body structure is not much different from that of humans, and there is no research value.

Since Lin Yun's words have already been said for this purpose, Lan Fengyuan no longer insists on it.

Everyone immediately set off to the entrance where they had just entered.

"Since you have no value, then die." When Lan Fengyuan left, he pierced the heart of the underground man.

Probably when everyone was flying 10,000 meters ahead, suddenly, the yellow sand in front of everyone, like a turbulent wave, hit Lin Yun with all his head and face.

The incident happened suddenly, and this yellow sand was so powerful that it was rolled up to a great height, and everyone was unable to dodge it for a while.

Lan Fengyuan was closer to Dr. Biology, and immediately grabbed his shoulders and flew to a higher place, and Lin Yun also immediately lifted into the air.

"It's amazing... what is this?" Lan Fengyuan was stunned, looking at his feet, and now the desert with a radius of hundreds of miles seemed to be rolled up by a big desert wave.

Layers of sand waves swept past, and the scene was very spectacular.

This sand wave did not last long, it came and went fast, it only lasted a few seconds, and the speed was extremely fast.

Gradually, this land returned to calm, but today's ground has undergone earth-shaking changes.

"My God...that...what is that?" Doctor Biology was taken aback.

Lin Yun and Lan Fengyuan also looked in the direction he was looking.