With this realization, Yan Fei no longer felt upset over the massive loss of life energy. Instead, he shifted his focus to other aspects because he could no longer afford to waste any more time. Previously, the Artificial Intelligence "Dream" had reminded Yan Fei that some of the Cultivators' treasure fragments were Drone Upgrade Essential Items. At that time, he was in the midst of an intense battle and only managed to collect the locked-on treasure fragments.

Now, Yan Fei finally had the time to see how many Upgrade Essential Items he had actually gathered. Then he saw a data point in "Dream": Upgrade Essential Items 13/100.

Yan Fei immediately understood that for the Drone to upgrade from Level 6 to Level 7, a total of 100 Upgrade Essential Items were needed. He had previously collected 13 Upgrade Essential Items, leaving him 87 short of reaching the Drone Upgrade threshold. But Yan Fei wasn't worried because there were still many Cultivator treasure fragments left in the Cosmic Void, with some showing as Drone Upgrade Essential Items.

So Yan Fei controlled the Drone Avatar to fly swiftly through the Cosmic Void, gathering some of the Cultivator treasure fragments marked by "Dream." As these treasure fragments were collected, the quantity of Upgrade Essential Items quickly surged. In a very short time, the number of Upgrade Essential Items had turned into 50/100. Although there were still many Cultivator treasure fragments in the Cosmic Void, collecting them further would no longer increase the number of Drone Upgrade Essential Items.

Yan Fei only needed a moment's thought to figure out where the problem lay. At this time, Yan Fei's Drone Avatar had transformed beyond being a simple product of Technological Civilization. Although it could still perform various operations like before, it had essentially become a fusion of Technological Civilization and Cultivation Civilization. Therefore, this upgrade of the Drone Avatar not only required Cultivation Civilization Items but also Technological Civilization Items. Now that Yan Fei had satisfied the collection of Cultivation Civilization Items, he must complete the collection of Technological Items to meet the basic conditions for the Drone Avatar's upgrade.

Although continuing to collect Cultivator treasure fragments was no longer beneficial for upgrading the Drone Avatar, these treasure fragments contained the super technology of the Cultivation Civilization. Yan Fei still planned to gather them and then study them to enhance the technological prowess of the Dreamland Cave World…

While Yan Fei's Drone Avatar continued collecting treasure fragments, it accidentally flew into an area. This area was where one of the Cultivators had been torn apart by Black Hole Gravity. The Cultivator's flesh had been sucked into the black hole, but a mysterious energy remained there, which even the Black Hole Gravity could not pull away.

Originally, Yan Fei didn't think he could utilize this mysterious energy. However, when the Drone Avatar entered these mysterious energy zones, Yan Fei inside of it suddenly felt his life energy rapidly recovering. He was greatly surprised and quickly extended his Spiritual Power to touch the mysterious energy outside.

To Yan Fei's surprise, the mysterious energy wasn't some bizarre energy; rather, it was the purest form of Life Energy. When Yan Fei's Spiritual Power entered it, he immediately felt the boundless supply of Life Energy inside, like an entire Life Universe. This Life Energy represented the future, capable of sustaining the growth of all things. With a flash of insight, Yan Fei, with a simple mental tug, rapidly drew the cluster of Life Energy left by the Cultivator's death into the Yan Fei inside the Drone Avatar.

After receiving the enormous supplement of Life Energy, Yan Fei, once on the brink of old age, began to rejuvenate rapidly. He transformed from an old appearance to one of middle age, then from middle age to youth. Once all the Life Energy entered his body, he not only restored his previous appearance but looked even younger than before…

Yan Fei was overjoyed. He had originally given up, never imagining he would encounter such a fortunate event, obtaining the supplement of Life Energy for nothing. Moreover, the amount of Life Energy left by one Cultivator was so vast that it not only fully restored Yan Fei's lost life energy but also provided surplus energy.

Eighteen Cultivators had appeared in this Cosmic Void, and after their deaths, they had left behind Life Energy here. If Yan Fei could absorb all this Life Energy, then boundless Life Energy would accumulate within him. With this Life Energy as support, Yan Fei could freely employ his previously perilous combat strategy, using the internal "Life Force" to deplete all his enemies.

Revitalized in spirit, Yan Fei controlled the drone to swiftly traverse the Cosmic Void. In a very short time, he absorbed all the Life Energy left by the Cultivators, storing it all within himself, granting him abundant Life Energy. Although he didn't know just how immense this Life Energy was, conservatively estimated, by normal consumption standards, Yan Fei could live for another million years…

Such an enormous amount of Life Energy was collected by these eighteen Cultivators through Evil Cultivation Techniques in the universe. This Life Energy not only extended their lifespan but also greatly enhanced their strength, making them top-tier experts within the Cultivation Civilization. These Cultivators originally intended to use their lengthy life span to accomplish the mission of rebuilding the World of Cultivation, but they never expected to stumble into the hands of the unremarkable Yan Fei. All the Life Energy they painstakingly obtained made a wedding dress for Yan Fei.

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