Global Catastrophe: I Became the World Tree

After Ye Feng became familiar with it, the efficiency of spirit refining became faster and faster.

Basically, at the end, it only takes 3 seconds to refine the spiritual sea of ​​a fourth-level mutant spider, only 6 seconds for a fifth-level one, and 10 seconds for a sixth-level one.

Of course, later on, Ye Feng will basically only select sixth-level mutant creatures for spiritual refining. The reason for this is of course because of the harvest.

For example, if you refine the spiritual sea of ​​a fourth-level mutant creature and get 1 spiritual origin, then refining the fifth-level mutant spider will be 10, and refining the sixth-level mutant spider will be 100.

A sixth-level mutant spider provided Ye Feng with 100 times the spiritual essence of a fourth-level mutant spider, but the difference in the time it took to refine them was only a little more than three times.

If he wanted to maximize efficiency, Ye Feng naturally knew what to choose.

But even if Ye Feng only refined the sixth-level mutant spiders, these 500 sixth-level mutant spiders still took a full 83 minutes.

It took such a long time and the harvest was huge.

When the last mutant spider was refined, the size of the Golden Crow expanded by nearly one-third compared to before.

Of course, this is only the first step. When the Golden Crow returns to the sea of ​​​​spirits, Ye Feng still needs to use the Golden Crow Spiritual Refining Method to integrate the spiritual origin in the Golden Crow body into his sea of ​​​​spirits. of refining.

This is equivalent to using the Golden Crow to transfer once, so the spiritual origin he obtains can be consistent with himself.

Ye Feng could clearly feel that the sea of ​​​​spirits was constantly expanding, and his mental power also began to improve rapidly.

After 5 minutes, this round of improvement stopped. Ye Feng felt it carefully. After just one round, his mental strength actually increased by 5%.

"It is indeed a spiritual secret technique that even Heaven must pay attention to. The effect of this improvement is immediate! At this rate, my mental strength can be increased by 100% in a day at most."

Ye Feng couldn't wait to start searching for the place where mutated creatures gathered.

Of course, before that, he would also turn on the tactical computer, check each team, and send back battle reports every half hour.

After confirming that nothing happened, Ye Feng immediately set his sights on the valley 5 kilometers away, where there was also a huge mutant spider nest.

And there are more sixth-level mutant spiders, about 700.

As soon as Ye Feng took a step, a wave of space rippled, and his figure appeared above the valley.

Just when Ye Feng was about to take action, his eyes turned to a group of mutant wild wolves wandering on the edge of the valley.

This group of mutated wild wolves obviously wanted to attack this valley. To be more precise, they were the prey on the spider webs in the valley.

Of course, Ye Feng had no time to care about what these mutant wolves wanted to do. His eyes fell on the three sixth-level mutant wolves headed by them.

"Speaking of which, I haven't tried refining these sixth-level mutant animals yet!" Ye Feng whispered to himself, taking another step forward and appearing in front of the mutant wolves.

These mutant wolves' intuition for danger was far superior to that of mutant animals. The next moment they saw Ye Feng, they did not attack. Instead, they all tucked their tails and started running away.

But facing Ye Feng, how could they escape? In the blink of an eye, all the mutated wild wolves fell into an illusion.

Immediately afterwards, the Golden Crow appeared again and crashed into the spiritual sea of ​​a sixth-level mutant wild wolf.

In an instant, Ye Feng realized that the spiritual sea of ​​these mutated animals was much stronger than that of mutated insects, at least twice as much.

But that was it for Ye Feng. As the spiritual flame rose from the Golden Crow, the entire spiritual sea began to collapse rapidly.

This time, it took Ye Feng about 20 seconds to refine the spiritual origin of the mutated wild wolf's spiritual sea and integrate it into the Golden Crow.

"Damn, what a loss!" Ye Feng couldn't help but mutter.

Of course, the reason why he said this was not because the spiritual origin he obtained from the mutant wolf was too little. On the contrary, it was more than he expected, five times more than the mutant spider.

It takes twice as much time to get 5 times the income. In other words, refining these mutated animals is 2.5 times more profitable than refining mutated insects.

The reason why he said he was at a loss was naturally because he had just wasted more than an hour on those mutated spiders.

But now that I have discovered it, it is not too late.

He quickly refined the three sixth-level mutant wolves, and then directly asked the Golden Crow to release the spiritual fire to kill all the remaining mutant wolves.

"Next, it's time to look for those mutated animals."

Ye Feng's mental power began to sweep across the area.

With his current mental strength, the farthest detection distance can reach hundreds of kilometers. As he closed his eyes to explore, he soon found mutant animals at the peak of the sixth level by his mental power.

Of course, Ye Feng did not leave immediately. Instead, he easily eliminated the more than 700 sixth-level mutant spiders in the valley and then left.

In the blink of an eye, half an hour passed.

Although Ye Feng only refined 90 mutated animals in this half hour, his mental power has increased by another 5%, and the total increase has reached 10%.

This improvement speed is naturally extremely fast, but the smile on Ye Feng's face disappeared.

"I really didn't expect that I would reach my limit so quickly." Ye Feng whispered to himself.

Of course, the limit he talks about is not that the spiritual sea cannot continue to expand, but the limit that he can accommodate in a short period of time.

Although what Ye Feng absorbed was the spiritual origin and had been transformed by the Golden Crow, it was still foreign and needed to complete the final step of assimilation before it could completely become his own.

In fact, this assimilation is always going on, and the spiritual origin absorbed back over time will naturally become his.

But the problem is that Ye Feng's efficiency in absorbing the spiritual source is too high. In less than two hours, his spiritual power has increased by 10%, which causes the assimilation speed to be unable to keep up.

And 10% is an upper limit. If Ye Feng continues to increase his mental power crazily, problems may arise.

So all he has to do now is wait.

Ye Feng silently felt it. It only took half a day for his spiritual sea to completely assimilate the newly absorbed spiritual origins.