Looking at the Xuanling iron ore wall in front of him through fluorescence, and thinking of the broken ore at the bottom of the pool, Meng Yi couldn't help but have a guess in his heart.

Shouldn't you reach the mountain wall behind the waterfall from here, and there will be Xuanling Iron Ore between them!

"Well, that's how it should be, so the Xuanling Iron Mine at the bottom of the pool also has an explanation, it should be brought down when the waterfall hit the mine wall. Meng Yi muttered to himself, and couldn't help but feel a burst of surprise in his heart.

He walked in that water hole for more than half an hour, and although the march was difficult, the distance was two or three kilometers.

Originally, after he discovered the Xuanling Iron Mine, he thought that he could build the two halls of Dan and Qi, but now it seems that it is more than enough to replace all the materials of the city wall with Xuanling Iron Mine.

The primary buildings in the fairy city need spirit-level materials to build, and in addition to some necessary special materials, there is not much restriction on the spirit-level materials used in the main part of these buildings.

In the previous life, human beings simply divided the materials on the Flood Desolate Continent into ordinary according to the level of treasures: ordinary, spiritual, treasure, and immortal.

Xuanling Iron Ore is a spirit-level material, and the space stone he obtained before is a treasure-level material, but it is a pity that it disappeared after the trial, and Meng Yi was a pity for a long time at that time.

In fact, the city wall Meng Yi originally planned to use a part of the spirit-level materials to smelt the stone, plus the formation to forcibly ascend to the primary, in the previous life, basically all the immortal cities were upgraded in this way The primary city wall, but now it seems that it is not necessary.

It's just that it's a little far away from Xiancheng, and it's difficult to transport.

However, this cave seems to be safe, and some people can be sent to mine it first, and then the storage bags can be refined later before being transported.

Thinking of this, Meng Yi jumped into the underground lake and prepared to return the same way, but at this time, there was a trace of abnormal movement from the World Tree in his body, and at the same time, a sense of longing arose in his heart.

Longing, Meng Yi was a little puzzled, how could he have this feeling, but after thinking about it, he realized that this should be the feeling that the World Tree passed on to him.

"What is it?"

Meng Yi followed the feeling and gradually swam towards the center of the underground lake, and the sense of longing in his heart became stronger and stronger, and the center of the underground lake was a stone pillar with a diameter of about twenty meters, standing on a small circular island.

However, just now Meng Yi was on the shore because of the problem of light, he could only see a stone pillar clearly, but now when he looked closer, he found that this stone pillar was actually made of various rare ores.

At a glance, Meng Yi found several treasure-level materials such as Adamantite Gold, Mithril, Xuanling Iron Mother, etc., as well as several materials that Meng Yi couldn't name, which should also be materials of the same level.

Stepping onto the island, a pure gold-based aura came from the surface, and was absorbed by the saplings in Meng Yi's body.

Meng Yi walked towards the stone pillar, just about to take a closer look at this 'precious gem pillar' with the help of fluorescence.

The mutation suddenly appeared, and I saw a golden orb attacking towards Meng Yi, and a sense of deadly threat rose in my heart

It's just that before Meng Yi could react and dodge, the sapling in his body had already taken the first step, and a golden root extended out of Meng Yi's body and grabbed the golden bead into his body.

Meng Yi was a little surprised when he saw this, could it be that this World Tree was still unconscious, but he was not afraid of any harm that the World Tree would cause to him, and that kind of deeper and deeper blood connection could not be faked.

And the sapling also changed at this time, and the golden branch, which originally had only a few leaves, suddenly opened up quickly, and in a blink of an eye, it was no different from the branch of the wood system. And the root of the tree that grabbed the golden bead also grew rapidly, stretching out of the dantian and taking root into the lungs.

At the same time, a golden star rose in the sea of consciousness, revolving around the spiritual power star, and a rich aura entered Meng Yi's body, promoting the improvement of Meng Yi's cultivation.

Meng Yi, who had just broken through the Blood Nourishing Realm for a few days, broke through the realm again and entered the Refining Realm, and at the same time, the liver and lungs occupied by the taproot of the World Tree also instantly dissolved all impurities, and were slowly nourished by the aura.

And Meng Yi's eyesight also suddenly increased greatly, and he had the ability to see at night, and the originally dim cave became clearly visible in his eyes, and he also found that the cave wall on the other side was actually made of a spirit-grade material called Chiling Copper Mine.

"The golden bead just now is the innate golden qi, these materials should be the acquired things that the innate golden qi has transformed. ”

Looking at the spiritual-level and treasure-level materials in the caves around him, Meng Yi couldn't help but think of the teacher's description of the origin of the five elements - innate qi, which can transform into acquired things.

After stabilizing his somewhat floating cultivation, Meng Yi reluctantly looked at the 'Precious Gem Pillar' in the middle, and then turned his head and left.

It's not that he doesn't want these treasure-level materials, but he can't use them now, and this pillar obviously supports the entire cave, so he doesn't dare to take it at all now.

Walking through the water hole again and returning to the waterhole, Meng Yi looked at the jungle that was still a little dim, and breathed a sigh of relief, fortunately it was not night.

Then his figure flashed and rushed towards the place where Lin Long and they were hunting, but he just bumped into Lin Long and Liu Yan on the way.

"Brother Lin Long, why are you two here?"

Liu Yan said with a smile: "City Lord, Instructor Lin said that it is getting dark, I am afraid that you will be in any danger." ”

Meng Yi smiled when he heard this: "What danger can I encounter." ”

"I'll just say, how can the city lord encounter any danger, but Instructor Lin has to pull me here, and I'm also very ...... Oops!"

Lin Long ignored Liu Yan, who was slapping his head and screaming, turned his head to look at Meng Yi and smiled: "Hehe, in fact, I don't want to, the main thing is that someone gave me a death order before he came, and I must bring you back safely." ”

"Someone gave a death order?" Meng Yi was slightly puzzled.

"I know, it's the city lord's wife, and she said that the city lord likes to be alone the most, so let the instructor watch it carefully. ”

"You stinky boy, you still can't control your mouth, you owe a lesson, go back and wait for special training. Lin Long kicked Liu Yan's ass again.

"Instructor, the city lord is still here, save me some face. Seeing that Lin Long wanted to fight again, Liu Yan hurriedly ran into the distance.

"Brother Meng Yi, don't care, this kid is like this, he hasn't been in shape all day, I don't know how many times I've been taught a lesson, I thought I hadn't changed a little bit in a few years, but it turned out to be like this, but it was quite reliable at a critical time, and he was a fire-based talent. Lin Long said with some embarrassment, after all, it was the soldier he brought out.

"It's okay, times have changed, cultivators should do whatever they want, it's better to have a true temperament, what's the point of wearing a mask every day and living like before. Meng Yi said with a smile.

"Brother Meng Yi, I feel that you have changed a lot compared to before, but I like you like this more, haha!"

However, Meng Yi only smiled slightly, then looked at the sky and said, "It's getting dark, Brother Lin Long, you inform the others, gather and prepare to go back to the city." ”

"Good. Lin Long responded and turned to leave.