There were countless extinct creatures in ancient times.

Humans know very little about the cause of this catastrophe, only those ancient creatures known for their size and strength were extinct in large quantities in a very short period of time.

According to the conclusions of the Corleon Institute of Biological Specimen.

The so-called catastrophe refers to a disaster of drastic changes in the ecological environment.

At the beginning of the catastrophe, due to the weak nature of lower organisms, they are most directly affected by severe environmental changes, and they will die in a large number of times in a very short time, while higher organisms can rely on powerful forces to survive the direct impact of the catastrophe.

but.

As time goes by.

Weak creatures are more likely to mutate, and will successively complete survival and evolution, gradually adapt to new environments, and reproduce and grow.

Powerful creatures find it difficult to adapt to environmental changes, and therefore they will become extinct in a large number of new environments.

As for the causes of extinction, there are many different causes.

Some of them are caused by the natural environment that damages it at all times, similar to being rejected by the world's magnetic field, which then generates energy backlash in the body.

Others are due to food scarcity and death from hunger day after day.

Once the lower creatures, after adapting to a brand new environment, they often carry highly toxic existences for ancient creatures.

The extinction of the Sky Tree is attributed to the collapse of its own ecological system and the loss of its symbiotic partner!

The collapse of the ecological system is easy to understand.

The secondary true body of the Qingtian Tree is the will of the biological chain that is attached to its ecosystem, which is formed by something similar to the mini-version of the laws of nature. If the biological chain is lost, it will lose the secondary true body ability and can only exist in the form of an ancient tree and cannot move.

As for the symbiotic partner, it is the grass and ginseng elves!

Ancient times.

For many higher plant life, the genus elves have the same status as today's bees, spreading pollen.

These higher plants need a special energy of the genus elves to complete the transformation of certain special life energy and thus maintain their huge size or rare attributes.

It is precisely because of this that the elves of grass and trees can rely on their insignificant strength to occupy a very important role in the ancient ecosystem and are protected by many higher plants' lives.

However, the ancient catastrophe...

"It's the moon!"

Xiaobai recalled the past, with a hint of fear.

"Since the moon appeared, my tribesmen shone under the moon, and their skin would ulcerate. Not only my tribesmen, but many ancient creatures would do this. Moreover, natural energy seems to have been seized by the moon, becoming thinner, and the world's magnetic field has become unstable. There are also changes in tides, which have triggered a large number of floods. The once beautiful coastline is full of corpses..."

In Xiaobai's description, the moon has become a terrifying devil.

"In that disaster, although I completed the mutation, I fell into a dehydration state because of this, and I knew nothing about everything outside."

The Tree of Truth holds Xiaobai as if treating the most precious thing in the world.

Lei Luo became the foil for the two, and was behind them.

“So that’s how it is.”

The Tree of Truth stared at Xiaobai, and a hint of expectation emerged on his turquoise face.

"So, how can I complete the transformation according to the evolution of the ancient sky-high tree?"

This tree of truth grafted by Pernie Vince has grown for nearly a thousand years and has grown to the peak of level 3. Theoretically, it only needs to complete symbiotic evolution and ecosystem construction to break through to level 4 existence.

"I don't know either."

Xiaobai said awkwardly: "Those things are done by my elders, and no one has taught me."

The originally anticipated gaze of the Tree of Truth was slightly depressed.

"I have a feeling that if I cannot complete symbiotic evolution and qualitative change, if I continue to grow like this, one day I will crush myself and die because of my own weight."

unconsciously.

The three of them had already arrived on the ground from the branches of the Tree of Truth.

Compared to the difficulty of climbing to the top of the tree before, the journey back is really much easier.

Lei Luo looked up and saw the tree of truth soaring into the sky and sank into the violent turbulent currents of the Tao.

He frowned and said, "Why did no one find you a few days ago?"

"On ordinary days, I will release the psychedelic fog, and I will only cancel the fog on the tenth day of the assessment. If I want to force my fog, I'm afraid at least it will need legendary creatures to have a chance."

The Tree of Truth explained a little.

Suddenly.

The earth trembled, and as the land rose, a piece of thick tree roots stretched out, revealing a hole in the ground.

"This is the first time outsiders have come to visit my home, so I can only enter this way. If only Xiaobai and I are the only ones, you just need to enter from my body."

Entering from your body?

Lei Luo looked at the slim figure in the green skin walking in front of him, and his thoughts were evil and dirty. Then he hurriedly said Lola's name, shook his head, and followed the two of them to the ground.

far away.

"Oh my God, what's going on there!"

"It seems that something has come out from the ground, let's go and have a look!"

However, as soon as these students got closer, the roots of the giant tree rolled and sank into the ground again. The underground entrance that briefly appeared disappeared without a trace in a blink of an eye.

After a while.

"hiss……"

Even Lei Luo can't help but feel incredible.

"This, this is what you said, a piece of tree roots that hold the sky!!"

At this moment, in front of Lei Luo's eyes, there was a vast star curtain world atmosphere. Lei Luo could vaguely see some elliptical arcs, and the atmosphere extends to the unknown in the dark.

And beside him was a huge fossil, like this earth vein with stars falling.

In other words, the so-called assessment space node is just some land evolved on this piece of residual root fossil of Qingtian Tree.

The so-called grafting is when Pernie Vince placed a special seed in the center of this starfall, and that's all.

All the rhizomes are so huge.

Lei Luo imagined the true size of the giant tree with the sky as he imagined.

"But how did such a huge rhizome come to the sky, together with so many star falls, forming the current star curtain layer? It is unimaginable what happened to the ancient catastrophe!"

Not to mention the collection and research of specimens after Lei Luo was shocked.

Xiaobai became increasingly intimate because of his instinctive symbiotic relationship with the Tree of Truth.

One night passed.

The three gathered again.

Lei Luo said: "Although I don't know what happened outside, according to the assessment regulations, on the early morning of the eleventh day, all students must leave the secret realm. Later, there will be construction personnel from the Finnish Academy to maintain the facilities to prepare for next year's assessment."

It is not difficult to imagine how angry the students who left the secret realm will question the people outside.

But this has nothing to do with Lei Luo.

Even Lei Luo is grateful.

If it weren't for such a change, he wouldn't have broken through the highest score in the graduation assessment so easily.

On the other side.

The Tree of Truth said: "Xiaobai is the key to my evolution. I can't leave it, so I have two plans, you think about it?"

Well?

Lei Luo said slowly: "You said."

"The first solution, I hope you can keep Xiaobai by my side. Time is uncertain, and it will take decades to stop, and it will take thousands of years to last. I will give you enough wealth."

"impossible."

Lei Luo immediately denied: "Xiaobai is my media partner. Once a scholar loses his media partner, it is almost impossible for him to advance."

It is not absolute if Lei Luo said this.

For ordinary scholars, it takes a lot of time to absorb natural energy after losing their media partners, so they will lose a lot of research time, but it is not absolute to say that there is no promotion again.

Lei Luo himself, because of his special astral evolution method, has deviated from the dependence on the media partners to absorb natural energy, replaced natural energy with special astral essence resources, forming another dependence.

in addition.

In recent years, Barda Academy has carried out blood fusion research. Many people are born to integrate into the world magnetic field, and can no longer rely on media partners to advance to level 1 energy magnetic field and integrate into the world magnetic field, or into the earth magnetic field environment of the star curtain.

The Tree of Truth slowly said: "The second solution, I heard from Xiaobai that if you want to build a laboratory, I can open a special teleportation smuggling coordinate for you, and I will bear all the teleportation consumption in the future. We can even complete the transaction in one go. As long as you can help me complete the ecosystem construction, my second true body will permanently protect the safety of your laboratory. How about it?"

This proposal made Lei Luo very moved.

Regarding laboratory safety issues, Lei Luo has Xiao Hei obtained from the fifth floor of the Sun and Moon Demon Eye Pyramid, but activating Xiao Hei requires a huge amount of energy source to allow him to exert his due power.
To be continued...