Everyone celebrated until one o'clock in the afternoon, when the shelter's allotted break had passed, and after a few pleasantries, they left.

Xia Ke, Ling Wenwen and Cao Silong wanted to stay in the ward for a while longer, but they were all blasted out by Duan Fei with the reason "I need to rest". The reason is not anything else, after the battle, the devouring ability is not deadly, Duan Fei doesn't know how many mutated zombies he has devoured, although three days have passed, but Duan Fei still doesn't know anything about his physical condition, he needs time to check it well.

With a "complaining" look, after Xia Ke and the others slowly went out, Duan Fei calmed down, and his consciousness entered the evolution system again.

As in the past, the evolutionary tree never appeared in the evolutionary system except for the first time, and everything you see in front of you is an illusory world made of colorful light.

In the process of fighting the corpse tide, a large number of gene nuclei were swallowed by Duan Fei and entered the body, originally absorbing so many gene nuclei, Duan Fei should be able to evolve, from F-level awakened to E-class.

However, he still did not evolve after all.

The reason is very simple, all the gene nuclei that were devoured by Duan Fei did not really integrate into his body, but were all decomposed into genetic energy by the evolution tree and stored in the evolution tree.

After the gene nucleus was decomposed and purified, the original fist-sized piece of gene nucleus was only less than the size of a soybean in the end, so the original large number of gene nuclei was no longer enough for Duan Fei to complete his evolution.

After seeing the current reserves of genetic energy, Duan Fei didn't know what to feel in his heart.

The evolutionary tree seems to be a perfectionist, as long as there is the slightest flaw in the genetic nucleus, it will be eliminated by him, and the last remaining genetic energy is pure, but the amount is very small.

The genetic energy consumed by Duan Fei when he awakened was the reserve of an entire source species, and the energy consumed was even more innumerable. I thought that after this battle and devouring a large number of gene nuclei, Duan Fei could advance to the E rank, but it seemed that he was still too naïve.

The mood was slightly disappointed, but when Duan Fei focused his attention on the remaining evolution points, this disappointment was immediately washed away by joy and excitement, and disappeared without a trace.

"Remaining evolution points: 10158!"

More than 10,000 evolution points, this number in front of him suddenly made Duan Fei speechless with excitement.

What does 10,000 evolution points mean, it means that nearly 10,000 low-level zombies died directly or indirectly at his hands. Of course, it can't really be counted like this, the vast majority of the evolution points come from mutant zombies, but what Duan Fei didn't expect was that he would kill so many mutant zombies single-handedly.

Faced with so many evolution points, Duan Fei didn't know what to do for a while.

At present, his strength, agility and detection ability are all level five, and he needs 1,000 evolution points to upgrade, while his mental power is three forces, and he needs 5,000 evolution points to evolve.

In addition to these basic attributes, he can also start the genetic engineering project again, which requires 10,000 evolution points to start, and the remaining evolution points are enough to use.

However, after careful consideration, Duan Fei decided not to start genetic engineering for the time being, although genetic engineering is powerful, but the specific effect will not be reflected until a long time later.

What's more, genetic engineering has already been started once, and Duan Fei believes that with his current genes, there should be no problem in successfully evolving to around the C level, so there is no need to start the project for the time being.

After the genetic engineering is not started for the time being, the only option left is to upgrade the basic attributes of the body.

Strength and agility are the two most important attributes for combat, and Duan Fei didn't hesitate to do so, directly spending 1,000 evolution points to upgrade them to level six.

After level 6, strength is the same as agility, but if you want to upgrade to level 7 again, you need 3,000 evolution points.

Now he only has 8,158 evolution points left, which seems to be a lot, but it is not enough for him to upgrade all his attributes.

After thinking about it again, Duan Fei still decided to use 5,000 evolution points to upgrade his spiritual power.

In the process of fighting the corpse tide, he has deeply realized the importance of spiritual power, which is like your soul. No matter how strong your body is, you will never get tired during the battle, but if your soul is exhausted, then you will still be a zombie after all, and the end will only be death.

After his spiritual power was raised to the fourth level, Duan Fei only felt a sudden shock in his body, and his mind was like the morning after a heavy rain, clear and clean, and the exhaustion was swept away, replaced by incomparable ease and pleasure.

Every level of mental power increases, the evolution points required are terrifying. However, the difference in spiritual power between each level is vastly different. It's like level 3 and level 4.

In the process of fighting the corpse tide, the third-level spiritual power could not withstand his high-intensity battle at all, and finally completely dried up.

But the fourth level was different, Duan Fei believed that if such a corpse tide broke out again, he would definitely be able to completely slaughter them by himself and calmly fight to the end.

After the spiritual power was upgraded, the last remaining more than 3,000 evolution points, Duan Fei still used to upgrade his strength, from level six to level seven.

This is the core attribute of Duan Fei's fighting style, if it is not for special circumstances, he is generally based on strength.

More than 10,000 evolution points were quickly used up, and the remaining 158 evolution points were no longer enough for him to upgrade any attributes, so he stayed there for the time being.

After upgrading his physical attributes, Duan Fei's gaze finally came to the final ability.

At the top of the ability is the devouring ability, and below the devouring ability, there are a lot of different ability options, all of which are grayed out, indicating that there aren't enough shards to activate them.

After seeing these ability points, Duan Fei slowly withdrew his gaze.

The devouring ability can devour the ability fragments of mutated zombies, but the number of ability fragments needed to actually have it is too many.

For example, if Duan Fei wants to activate the frenzied ability, the system says that the ability shards required are 10,000 points.

Not to mention that in order to obtain so many ability fragments, Duan Fei had to kill 10,000 mutated zombies alone, and the most important thing was that among the mutant zombies he killed, their abilities must all be mad.

This is currently an impossible task for Duan Fei. The most important thing is that he doesn't need to spend so much energy to activate an ability that is not of much use to him.

Looking at the long list of unactivated ability fragments below, Duan Fei's brows furrowed.

Devouring the ability to loot ability shards sounds like too much of a rebellion, but the downside is obvious. With so many ability fragments piled up here at the moment, it was of no use to Duan Fei at all, and it seemed too chicken.

However, he has no way to deal with these ability fragments for the time being, but Duan Fei believes that it won't be long before he can find a solution!

After a general understanding of the physical condition, consciousness slowly withdrew from the evolutionary system.

Opening his eyes and feeling the feeling of energy saturation coming from his body, Duan Fei's eyes slowly swelled with a look of confidence and joy.

After upgrading again, although he failed to evolve, his strength was much stronger than the original.

With seventh-level strength, sixth-level agility and fourth-level spiritual power, Duan Fei believed that as long as he didn't encounter D-level elite monsters, other mutated zombies or abilities, he should be able to have the strength to fight, and even if he couldn't beat it, he could escape calmly.

With another leap in strength, Duan Fei is getting closer and closer to his next plan.

It didn't take long for Duan Fei to believe that he should be able to successfully advance to the E-level Awakened, and at that time, it would be time to actually leave the Vault.

Duan Fei said that he was a wild wolf and did not like to be restrained. What he yearns for is freedom, the thrill of seeking a breakthrough in constant fighting.

As long as his strength reaches Duan Fei's expected goal, his next place to advance is the legendary forbidden area of human beings "Siberian Wasteland".

In the era of the end of France, the Siberian wilderness was a lifeless and extremely cold land, which was said to be a forbidden area for humans, not because of its extreme weather environment, but because of the countless terrifying monsters that lived there.

The five most powerful of these monsters are all S-level lord-level fierce beasts, and even the top powerhouses among the human race dare not set foot there easily.

Humans have fought for the Siberian wilderness several times. But all of them ended in failure.

However, despite several crushing defeats and heavy costs, humanity still does not give up on retaking the Siberian wilderness.

The reason is not anything else, in the Siberian wilderness, there is a very old and powerful ancient ruin. It was unknown what segments of the ruins were flying, but he believed that the secrets buried in the ruins that the human leaders would have dreamed of retrieving were absolutely earth-shattering.

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