When Zhang Mu hurried back from the tent, he had two large cloth bags stuffed full in his hands. If he hadn't raised his arms high, the bags would have been so full that they would have buried him.

boom!

The moment the cloth bag was placed on the ground, the entire tent shook instantly.

Yuan Rui couldn't help laughing. She looked at Zhang Mu, who was bending over and not even as tall as the cloth bag, and said, "There are so many Yuan Crystals. Uncle, you didn't empty the stock in Shanxi City, did you?"

Zhang Mu's shoulders trembled and he said, "You underestimate the strength of Shanxi City. They have collected a lot of crystals. You should know that all the zombies in Shanxi City have been completely wiped out by Long Qi and his men.

There are only 5,000 Yuanjing here, and that was the number I mentioned to Long Qi. Otherwise, according to what he meant, he could have doubled it for me. Now there is only one Long Er in the entire Shanxi City who is going to be promoted to the second level. They are going to get moldy if left in the warehouse, and the people below don’t know what use they are.”

Yuan Rui chuckled, looked at Zhang Mu and said, "Then uncle, when do I start?"

"Let's do it now. It doesn't matter whether it's sooner or later. It's just right now." Zhang Mu knew that if he had a beast core with corresponding attributes and a huge base of Yuan Crystals, it would normally be very easy to advance to a higher level. According to the experience of his predecessors, although the process would be a little painful, the body would not suffer particularly serious damage.

After saying this, Zhang Mu handed the white fox's beast core to Yuan Rui. He moved the bed away and asked Yuan Rui to sit cross-legged on the ground with her eyes closed and concentrate.

Advancement requires a quiet environment. Even in the military camp, he had already ordered the obsidian insects and mutant wolfhounds to patrol the surroundings and not allow anyone to approach. The second layer of protection was the blood vine lotus that had long been buried deep around the military camp. However, the last layer of protection was Zhang Mu himself. His mind was already fully focused.

Yuan Rui's expression changed back to the same as before, and she was about to fall into it, but her body was still trembling slightly. Zhang Mu quickly poured all the Yuan Crystals in the cloth bag into one bag and piled it around Yuan Rui, then picked up another one and continued

To continue, in order to keep Yuan Jing close to Yuan Rui's body, Zhang Mu even used the power of the mental shield.

With Yuan Jing's external energy buffer to make up for the hunger of the cells in her body that had their potential stimulated, Yuan Rui's expression eased a little, but the beast core in her palm emitted a black and a white airflow bit by bit on her hot hand, which slowly merged into Yuan Rui's body.

Fortunately, the white airflow was originally very compatible with the green light flashing on Yuan Rui's body, so it did not encounter much obstruction when entering Yuan Rui's body.

But the black one was different. When it came out of the beast core and just touched Yuan Rui's body, Zhang Mu clearly saw Yuan Rui's body tremble, and the black gas did not disappear and was not absorbed into Yuan Rui's body.

This means that Yuan Rui's body is rejecting this spiritual energy. It is rejecting it.

Zhang Mu frowned on the side. If he had tried using a soul crystal on Yuan Rui before, a first-level one would have been much easier to accept than using a second-level white fox beast core to upgrade her now.

What if it fails?

Even if she did not accept the black spiritual airflow, the white healing energy would still help Yuan Rui to successfully advance as a healing-type second-level evolver. But if that were the case, that spiritual energy would be completely wasted.

Zhang Mu felt it was a pity to waste this dual-system mutant beast core, because he might not encounter a mutant beast as rare as the old white fox again in the future.

Although he felt a little regretful, he did not think too much about it. There was no way to change it now. As for external force promotion, such as using Zhang Mu's own mental power to force this stream of air into Yuan Rui's body, he had never thought about it. If external force could interfere with the promotion process, it would be very easy.

There is only one prerequisite for this kind of external attribute energy to enter a person's body, and that is how deeply the evolver understands his current abilities and energy.

Yuan Rui's heart

It is kind and fits the essence of healing energy very well. She also works hard to understand the energy in her body because she finds that she cannot help Zhang Mu in battle. She can only hope that when he is injured, she can help him recover faster.

Because of all this, she felt so relaxed when receiving the second-level healing energy. But the problem now was that her understanding of spiritual energy was almost blank, so the black air flow kept lingering.

Yuan Rui seemed to be aware of the current situation. She was so anxious that sweat was about to drip down, but it was still useless. She watched the healing energy slowly merge, and half of the Yuan Crystals around her melted away, but the black airflow still did not move.

At this time, Zhang Mu whispered in her ear, "Calm your mind and feel the breath of spiritual energy with your heart. Use your will to stimulate the spiritual energy hidden in your body. Capture it and place it in the most central position of your brain, so as to force the close-range energy of this second-level beast core from the outside world into your body."

Zhang Mu's words were undoubtedly a revelation to the anxious Yuan Rui. She no longer blindly absorbed the breath that did not belong to her, and began to calm down, regardless of the fact that the healing energy was about to end.

She used her own will to search in her brain for a trace of spiritual energy that everyone may have, more or less. Even though it was like looking for a needle in a haystack, she was calling.

I'm here, come find me!

Her strong will is like a beacon, calling the wanderers to return home in the confusing darkness.

Finally, the long call was responded to. A weak spiritual energy jumped out of the silent spiritual ocean like a small fish and appeared in Yuan Rui's vision.

She immediately captured it and placed this spiritual energy in the center of her brain according to Zhang Mu's instructions.

Finally, the fish took the bait!

The black airflow was attracted by the spiritual energy in Yuan Rui's body and entered her body little by little.

Although it was difficult, it was finally fully absorbed!

(End of this chapter)