Within an hour of the king cobra's breakthrough, sparrows, bats, and black crows also broke through.

When they reached the late stage of the first order, their size became larger, and their strength increased significantly.

However, the rat with the highest realm did not break through to the second order as Ye Feng expected.

It seems to have reached a critical point, and it is stuck there, and even the aura absorbed per hour has been reduced from 3 points per hour to only 0.3 points per hour.

With such a small amount of aura absorption, it is simply impossible to help the other party continue to improve their strength.

"Isn't this the legendary bottleneck?" Ye Feng felt a little pain in his brain.

He himself has never experienced this situation, because as long as there is an evolution point, he can break through.

"It should be possible to break through sooner or later, but I don't know how long it will take." Ye Feng recalled the rats on Ah Sanguo's side, and it was obvious that this was not the limit of mutant mice.

"But it's okay, it's just that the bottleneck of the big realm is stuck, and the small realm can still be broken through." Ye Feng muttered again.

If these mutant creatures can't even break through quickly in a small realm, he will really have a headache.

Next, Ye Feng didn't care about these mutated creatures, but began to indulge in adding points.

When the time came to the early hours of the morning, he had once again accumulated enough 40 evolution points and could break through again.

"Ding! Please select the direction of reinforcement. ”

Looking at the system panel, Ye Feng didn't hesitate to choose, flexibility.

After 10 minutes, the breakthrough was completed.

Host: Leaf Maple (World Tree)

Tree height: 55 meters

Trunk width: 2.75 m

Root length: 270 m

Realm: Late second-order stage

Evolution point: 0/40

Special Abilities: Devour, Capture

Aura: 0/550 points

Bioenergy: 200/550 HP

"It's been less than two days, and I didn't expect to be the tallest tree in the valley." Ye Feng was a little emotional, but more worried.

Because now he has become the most conspicuous presence in this valley.

And it is conceivable that as his strength increases, it will become more and more conspicuous.

"Forget it, don't think about it so much, you should pay more attention to those things that are worth being happy about."

Ye Feng quickly shifted his attention to the roots of the tree.

With the strengthening of flexibility again, Ye Feng found that the flexibility of his tree roots had once again been greatly improved, and it was no less than that of human fingers.

He can already control the roots of trees, do all kinds of actions at will, and even use various tools and weapons flexibly.

Of course, in addition to these, the more intuitive point is that the roots of the tree move and attack faster.

Swish! Swish! Swish!

As Ye Feng's mind moved, hundreds of tree roots broke through the soil and attacked the mosquitoes flying into the air.

Before, it wasn't so easy for him to attack these mosquitoes.

A single tree root will definitely be dodged, and you can only use the tree net, which is too inefficient.

But now, when the roots of the tree are whipped, 90% of these mosquitoes will not be able to react, and they will be directly drawn and die instantly.

Even if you can react and dodge the 1st root, the 2nd and 3rd roots will immediately hit you.

At this moment, with Ye Feng as the center, the mutant mosquitoes within 270 meters around fell like rain.

In the future, the territory where Ye Feng is located will become a forbidden area for these mutant mosquitoes.

In this process, Ye Feng originally wanted to solve even those mutated flies.

But unfortunately, the fly was very nimble before the mutation, and now it has become even more terrifying after the mutation, and his root whipping speed still can't keep up, and he gives up after two attempts.

He is not in a hurry for these, and with his current evolutionary rate, it is estimated that it will take less than two days to clean them up.

At the same time, as the roots of the tree grow, his territory expands further.

Ye Feng estimated slightly, and now the aura he can harvest is about 100 aura points in an hour.

"At this rate, wouldn't it take me another 4 hours to break through again?" Ye Feng was a little excited.

This gave him the illusion that the stronger the strength, the faster the breakthrough would be.

But soon, he found that the situation was not what he thought.

It's not that there's something wrong.

Instead, he forgot to take into account the consumption of cultivating mutant animals.

During the day, they can hunt on their own, not only to "feed" themselves, but also to have a surplus aura.

But at night, as the number of prey decreases and the difficulty of hunting increases, plus these mutated creatures also have to rest, it is basically Ye Feng who is raising them.

And now the 7 mutant creatures under his command, all combined, consume a full 40 points of aura in an hour.

Even after deducting the mutant rats that are at the bottleneck, he still has to provide at least 37 aura points per hour.

So in the end, the aura left to Ye Feng was only 63 points.

Of course, this is a lot, but it can't make him reach 4 hours and break this standard.

......

At 6 o'clock in the morning, as the sun rose, Ye Feng also woke up from a short slumber.

He glanced at the spirited mutant animals rising up one after another under the tree, and a smile curled up at the corner of his mouth.

Although he didn't break through in the second half of the night, this group of mutated creatures, under the condition that he was constantly feeding the aura, broke through one after another.

Sparrows, black crows, bats, once again broke through.

They have all reached the pinnacle of the first order.

It can be said that now, except for the mutant buffalo that was only subdued by him last night, the rest of the creatures are already at the peak of the first order.

Even the mutant buffalo in the early stage of the first order has now broken through to the middle of the first order, and it is not far from the late stage of the first order.

And the rapid breakthrough of these mutated creatures also made Ye Feng realize that as long as there was enough aura, the speed of mutation of these animals would be far faster than humans imagined.

Fortunately, the rest of the mutated creatures do not have the devouring ability of his pervert.

They can only rely on breathing to absorb the spiritual energy between heaven and earth, so the speed of accumulating spiritual energy is very slow.

As for why some mutated creatures evolve so fast, he can only classify them as the differentiation of living beings.

At the same time, along with observation and statistics, he also discovered another thing.

The rest of the mutant animals are the same as him, and there is an upper limit to the aura absorbed by each realm, and as long as it is reached, it can be broken through.

For example, if a sparrow absorbs 10 points of aura, it can break through a small realm.

The rat needs 15 aura to break through.

Black crows and bats require 20 aura to break through.

The king cobra, on the other hand, requires 50 aura points to break through.

As for the mutant buffalo, which is the largest, it needs 60 aura.

Judging from the current situation, the larger the creature, the more aura it needs to absorb to break through.

Of course, the amount of aura absorbed is not completely judged by body type.

After all, mutated sparrows can break through by absorbing 10 points of aura, but mutant buffaloes need 60 points of aura.

But the size difference between them is not 6 times, 600 times.

Therefore, Ye Feng estimated that the amount of spiritual energy absorbed, in addition to the factor of their size, was also related to the realm.

But it is undeniable that in the same realm, the more aura is absorbed, the stronger the seemingly combat effectiveness.

"If you calculate according to this, I need to absorb 100 points of aura to break through at the first order, and I should belong to the strongest echelon." Ye Feng made a summary.