Yurou Fei could not have imagined that Ling Xiao's aura would suddenly soar at this moment, advancing from the initial low-level Saint realm to the mid-level Saint realm.
She could not understand what was going on.
After all, after reaching the Saint realm, one needed to accumulate a large amount of energy, and it was not easy to increase one's strength. Even the most outstanding people in Tenbin would need time to accumulate and gradually increase their strength.
Only by consuming pills or spirit herbs that could increase one's strength could one instantly increase one's strength.
However, Ling Xiao had been by her side the whole time. She only saw a bit of green light enter his head, and then his strength soared.
"What kind of magical thing is that spirit tree? It can actually increase Ling Xiao's strength. Could it be that Ling Xiao relied on this method to reach the mid-level Saint realm in just a few dozen years?" Yurou Fei guessed.
If Ling Xiao heard this, he would definitely cry out in injustice!
Although he had a fortuitous encounter that allowed his strength to soar, a lot of his strength was also obtained through his own hard work and cultivation. Moreover, he had only obtained those fortuitous encounters after going through a narrow escape from death, and there were not many tricks to it.
Ling Xiao did not have the time to explain to her now.
He used the Unique Guiyuan Technique to transform this energy into five different attributes, and absorbed and refined them one by one.
Ling Xiao cultivated five attributes, and the amount of energy he needed to advance was several times more than that of an ordinary warrior.
With the huge amount of energy from the Tree of Immortality, it should have been enough for an ordinary Saint to advance another level. However, after Ling Xiao digested and absorbed this energy, he had only reached the Great Success of the low-level Saint realm. There was still a long way to go before he reached the peak of the low-level Saint realm.
This was also because Ling Xiao had received the energy from the Heavenly Fire Pearl when he was at the fifth level, and with the addition of this energy, he had reached this realm.
Ling Xiao was still somewhat dissatisfied with this, and even shouted at the Tree of Immortality to transfer more energy.
The Tree of Undying was very depressed. It had just advanced to the next level after much difficulty and became a Level Nine Holy Tree. The additional power it provided to Ling Xiao was already very huge, but it was still not enough.
It simply chose to ignore it, soaking in Ling Xiao's mental fluid and continuing to warm its trunk.
Its trunk was even more verdant and sturdier than before, sparkling and translucent like ink, appearing even more magical and extraordinary.
With its current abilities, the effects of the Ten Thousand Year Tree Sap, Ten Thousand Year Tree Fruit, and the Undying Root had increased by several times.
If Ling Xiao knew about this, he might not be able to stop himself from demanding and squeezing it dry.
"Haha, it seems that following this brat has a great opportunity. In just thirty years, not only has he recovered his essence energy, but he has also improved. This old man was not wrong!" Lu Weng said proudly in Ling Xiao's Sea of Consciousness.
With the Tree of Immortality back, Ling Xiao and Yurou Fei once again advanced to the next level.
The space on the seventh floor was of the metal attribute. The pressure from the distortion of space here almost suffocated the two of them.
Fortunately, they had recovered their ability to fly, so they no longer needed to walk.
The greatest danger here was the streaks of golden spatial energy. They were like the sharp blades used by high-ranking Saints, and they kept coming at them.
In this place, Ling Xiao and Yurou Fei could not use any tricks, so they could only rely on their own strength to break through.
Ling Xiao's physical body was comparable to a high-grade Saint tool, so his defense was already quite astonishing. However, in the face of these sharp metal blades, he was still injured. Golden blood continuously splattered from his body, and many of his dragon scales fell off.
He wielded the Golden Dragon Spear and burst forth with powerful battle strength. With an unyielding will, he endured all the pain and charged forward bravely.
Yurou Fei was a peak Saint, but her physical body was not as strong as Ling Xiao's. Fortunately, she had a high-grade defensive armor to protect her vitals, but she could not avoid being injured. Her jade-like arms and legs were covered with wounds so deep that bones could be seen, making her look extremely sinister and terrifying.
After consuming many healing and qi recovery pills, the two of them finally made it through the most dangerous area.
Along the way, the two of them obtained another harvest from this floor.
Diamond was one of the most precious materials needed to refine metal attribute Saint tools. It was even more precious than the black inkstone they had obtained from the fourth floor.
After all, metal attribute materials were extremely difficult to find. Moreover, they were much harder than black inkstone, ten-thousand-year black stone, and other materials.
Besides the diamond, Ling Xiao also obtained a lump of metal attribute source energy, "Metal Genesis Qi"!
This Metal Genesis Qi was in no way inferior to the ten-thousand-year geocentric spring. For metal attribute martial artists and spirit beasts, it was the purest source of energy.
For low-level martial artists or spirit beasts, if they directly absorbed and refined this energy, their strength would definitely increase by several times, and there would be no side effects.
It could also improve the metal constitution.
Just how tempting was this effect?
This made Ling Xiao smile from ear to ear.
If he directly refined this lump of Metal Genesis Qi, he could definitely advance to the mid-level Saint stage.
However, Ling Xiao did not do so. There was not much Metal Genesis Qi to begin with. He wanted to use a portion for the Golden Wolf King to advance, and leave the rest for his woman, Cai Xiayue, his son Feng Lingtian, and his brother Ye Yunfeng.
After all, they had metal attribute constitutions, so the Metal Genesis Qi would have the most powerful effect on them.
With the help of the three foreign objects, Ling Xiao was not afraid that he would not be able to advance. It was only a matter of time.
Moreover, there were still two more floors. Who knew, there might be some amazing treasures that could help him advance.
But then again, he was wondering if the Saints who had rushed to the Heaven Domain from the Ling Xuan Continent had also obtained various Saint treasures like him.
He felt that there should be!
In front of the eighth layer of the spatial barrier, with the help of the Ancient Emperor Divine Art, the wounds on Ling Xiao's body had already healed.
Although Yurou Fei was a peak Saint, in terms of healing speed, it was difficult for her to compare to Ling Xiao.
She took a lot of pills in succession before she gradually recovered.
"How is it? Is it okay?" Ling Xiao looked at Yurou Fei and asked with a pained expression.
Yurou Fei said with a stubborn expression, "You should take care of yourself first!"
No matter what, her strength was above Ling Xiao's. In the face of all kinds of dangers, she was actually not as calm and collected as Ling Xiao, which really made her depressed.
"Well, if you really can't do it, don't force yourself. In terms of combat strength, I may not be as good as you, but in terms of life-saving methods, you definitely can't compare to me. You don't need to deny this!"
Ling Xiao emphasized. After a pause, he said, "That ball of Metal Genesis Qi is of great use to me, so I can't give it to you for the time being. Let's see what Saint treasures there are later, and then I'll let you occupy more of it. What do you think?"
Yurou Fei nodded, indicating that she agreed with Ling Xiao's words. She then sighed, "There were many dangers along the way. I don't know if my adoptive father also passed through like this!"
Ling Xiao had heard Yurou Fei talk about her adoptive father. He had left the Sand Region for the Heaven Region about six thousand years ago. At that time, her adoptive father was already a peak Saint or even a half Holy Emperor.
The time when he left was somewhat similar to the time when Ling Xiao's master, the Evil Master, left.
However, the Evil Emperor was in the Central Region, while Yurou Fei's adoptive father was in the Sand Region. There shouldn't be any intersection between them. Perhaps it was just a coincidence!
"Don't worry. Your adoptive father has been described as a god by you. His life-saving methods are definitely not inferior to ours. In fact, he didn't even look as miserable as we did. He directly passed through the nine levels and reached the Heaven Region!" Ling Xiao comforted her.
Yurou Fei chuckled and said sincerely, "Thank you!"
"Don't say it like that. Sooner or later, you will be my woman. Your adoptive father is also my adoptive father!" Ling Xiao said with a smile.
"Haha, when your strength catches up to mine, I will be your woman!" Yurou Fei smiled happily.
She had a very good understanding of Ling Xiao's character through these days of contact. If Ling Xiao's strength could surpass hers, then she wouldn't mind submitting to him and willingly becoming his woman.
"Don't worry. You won't have to wait too long for that day!" Ling Xiao spoke in a rather confident tone.
A trace of longing flashed in his eyes because a woman had once said the same thing to him.
When his strength had caught up to hers, they had been separated. Now, there was no news of her at all. He felt extremely guilty in his heart.
"Meng Qi, just you wait. I will be able to find you very soon!" Ling Xiao shouted in his heart.
Ling Xiao and Yurou Fei had recovered their strength, and they headed towards the 8th level once more.
The spatial barrier of the 8th level was extremely thick. Even Yurou Fei found it difficult to break it open by herself.
In the end, after many attacks with all her strength, she managed to break open a hole that could only allow two people to pass through.
The two of them quickly rushed in. As soon as they entered, the spatial hole immediately closed up. The speed was so fast that it was shocking. If they had been half a beat slower, they would have had to open up the spatial hole again.
When they entered the 8th level, they didn't feel anything wrong. However, they discovered a strange phenomenon.
That is, this space had a change of day and night. Moreover, this change was quite fast. One moment it was daytime, and the next moment it was night. It flickered, as if the lights in the night were on and off, and off and on, and on and on.
"Could it be that there are two attributes of light and darkness here?" Ling Xiao thought doubtfully.
On the side, Yurou Fei didn't reply. She just frowned, as if she had thought of something terrible.
"We must rush to the barrier of the 9th level at full speed. The alternation of light and darkness here is extremely fast. It should have produced a mighty force that reverses time. Our lives will rapidly decline due to the rapid passage of time!" Yurou Fei cried out in panic. She directly grabbed Ling Xiao's hand and rushed forward.
She increased her speed to the fastest she had ever been and left this place.
Ling Xiao didn't think much of her explanation. Even if time passed a little faster, it wouldn't matter. After all, people like them who had reached the Saint level had a lifespan of more than 10,000 years. Even if they lost a few hundred years of their lifespan, it would be negligible.
However, just as he was thinking nothing of it, he discovered a serious crisis that made his scalp tingle.