For this group of mining slaves, Zhou Nan did not have the slightest sympathy.

I don't know if Lu Dao's innocent compassion has long since died, or because he is used to seeing life and death, he has become immune to these. All he could do was exchange some unused spirit rice for a large pile of ore from them. It's just a deal, and he's at ease. Otherwise, he can be tough, and it is not a difficult thing.

Although this transaction seemed unfair to outsiders, Zhou Nan did it without hesitation. At least in exchange with him, these miners can live longer. Since stepping into the realm of cultivating immortals, everything in Zhou Nan, and the worldly mortals, have long been no longer people in the worldly realm. After all, you can't let the elephant mind the ant's?

Casting the wind control technique, Zhou Nan quickly passed through the mine. Since reaching the seventh layer of Qiling, he has already reached the point of perfection in mastering the Wind Resisting Technique. In this small cavern, it is still very flexible.

After reaching the seventh layer of Qiling, the immortal cultivator had a signature ability, the flying sword.

It is only after possessing this ability that an immortal cultivator is an immortal who ascends to heaven and earth in the mouth of a mortal and is omnipotent. Whenever an immortal cultivator appears, this sword flight will be firmly engraved in the mind of every mortal who sees it, and it will be praised and worshipped by it. This shows the importance of this supernatural power.

It's just that Zhou Nan has reached this realm, and the time is still short, and he hasn't had time to try the ability of this imperial sword to fly. In desperation, he had no choice but to move forward with the Wind Resistance. Although the speed is alone, the Wind Resisting Technique cannot catch up with the flight of Edgeworth. But in this kind of changeable and small position, the Wind Resisting Technique is not without the slightest advantage, at least it is very flexible, so it will do.

He paid more attention to the coordination of the monk's body and mana. Unlike Edgeworth's flight, it greatly liberates the monk's body, focusing only on the use of mana. These are two different concepts, the former is a combination of manpower, and the latter is a combination of manpower. It's really hard to say which is better or worse. But for himself, the former is better.

Zhou Nan prefers wind control techniques, exercising mana, and tempering the physical body. Since he was a child, he has been a very restless master who likes to dance with knives and guns, and if he is asked to give up his physical body and specialize in mana, he is really not used to it.

Half a day later, after advancing more than ten miles to Luxia, looking at the mine cave that had reached the end, Zhou Nan frowned and stopped. Looking at the steaming fiery red rocks in front of him, he narrowed his eyes and searched carefully.

Because of the effect of divine thoughts, Zhou Nan's search for purple stones was very fast. But even so, after searching several mines, it took a lot of effort for him to find a small piece of purple stone. The probability of the existence of these stones is too small, even Zhou Nan is also distressed.

"It seems that this is the place where the old mine slave found this purple flint. At this temperature, mortals will die of dehydration if they stay for a while. Luckily, I have the mana, so I don't have to worry about that. Playing with the purple stone and feeling the burning heat on his body, Zhou Nan attached a layer of mana passport to his body and said slowly.

Although the temperature here was very high, Zhou Nan did not stop and continued to look for the passage to Luxia. But alas, this place may be the limit of what mortals can reach. After looking for a long time, Zhou Nan was stunned and didn't find the passage to Xiang Lu. In desperation, he had no choice but to sacrifice his sword, find a flat and hidden place, and start digging towards the lower part of the sword.

After reaching the seventh layer of Qiling, Zhou Nan became more flexible in controlling the flying sword. With a casual blow, the power is far greater than before. In a short time, under the speed of cutting stones like cutting tofu, he dug nearly 100 meters deep under the ground.

As you descend, you can clearly feel that the surroundings are getting hotter. Wiping a handful of hot sweat from his forehead, without stopping, Zhou Nan continued to dig. He wanted to find a place where the earth fire was strong so that he could practice the casting technique.

After a cup of tea, when splitting a piece of crimson giant in front of him. Before Zhou Nan could stand firmly, he felt that his feet were empty, and he shouted that it was not good, and even the end of the person with the flying sword was planted under the sword.

The moment he fell, Zhou Nan felt that the temperature around him had risen sharply, and the terrifying temperature made him a little unbearable. In desperation, he had no choice but to muster up all the mana in his body and inject it into the flying sword in his hand.

With the injection of mana and money, the flying sword in his hand shook, and let out a violent soft groan. With a happy face, Zhou Nan's mind moved, and the flying sword turned into a green rainbow, and when the light flickered, it quickly appeared at his feet.

Suddenly, a miraculous scene appeared. I saw a flying sword about two feet long and glowing with green rainbows, actually fighting, dragging Zhou Nan's weight of more than 120 catties in the air alive, and no longer falling.

Stabilizing his body and standing on the flying sword, Zhou Nan took a deep breath and looked at everything in front of him. It was a fiery red, and he couldn't open his eyes even when he was roasted by the mana shield.

A large amount of mana was injected into his eyes, isolating the heat, and Zhou Nan looked at it intently.

I saw that less than ten feet below me was a sea of lava and fire. The viscous magma was tumbling violently, and from time to time there were large streams of magma, spraying into the air, and the huge fire power almost splashed on his body.

Flying to a high place, Zhou Nan found that this was a space of several hundred zhang in size. Twenty or thirty feet above his head was a high rock dome with a large hole in it, which he had just pierced. The surrounding rock walls are burned red by the high temperature of the magma. From time to time, large chunks of rock, melted into liquid, rolled down.

However, the rock wall emitted purple light from time to time, and just one glance made Zhou Nan excited for a while.

"Hahaha, so many purple flint stones, better than the previous two pieces, it's really a big profit. Such a strange existence, what a good place to cast!" Zhou Nan lit up a pair of eyes, and the sound of hearty laughter continued to echo in this hundreds of zhang of space, but then it was drowned out by the rolling sound of magma.

After venting for a while, I held back the excitement in my heart. Zhou Nan quickly opened up a cave three or four zhang in size on the rock wall three zhang high from the magma. He took out the mountain guard formation, added the spirit stone, and arranged it around the cave. The formation was activated, and the yellow light of the mountain guarding array flashed, and it disappeared into the fiery red rock wall.

In an instant, the temperature inside the cave dropped.

After that, Zhou Nan nodded with satisfaction, and did not stop, casting the flying sword that was not yet very skilled, wandering on the surrounding rock walls. After a while, a large pile of purple flint stones appeared on the ground of the cave.

After digging the purple stone, Zhou Nan returned to the cave and used his flying sword to make a deep hole half a meter thick in the center of the cave, until he saw the magma, he breathed a sigh of relief and stopped. Looking at the thick flames coming out of the round hole, and the swaying figure that was more than a foot high, a thick smile appeared on Zhou Nan's face.

Immediately, he found another boulder that had not been melted by the lava. Very easily, he carved a casting furnace with a flying sword. After checking that everything was correct, the casting furnace was placed on the round hole. A strong flame hit the bottom of the casting furnace, and under the action of intense high temperatures, the casting furnace was burned red in a short time.

After that, Zhou Nan cut out a flat boulder and used it as a casting table. Then, after thinking about it, he quickly pulled out all the ores in the storage bag and piled them up on the ground.

The red flint occupies a large part of it. Other ores, such as copper concentrate, black iron ore, obsidian ore, flame ore, etc., are specially purchased in a small pile. It all looks unremarkable.

Looking at the piles of ores in front of him, Zhou Nan squinted his eyes, and there was a burst of excitement in his heart. It was a long time before he could bear the idea in his heart that he wanted to forge immediately. Take out the mat and sit down cross-legged.

An hour later, after recovering the mana consumed just now, Zhou Nan started the "Soul Refining Technique" again

In the past two years, in order to break through the seventh layer of Qiling, in desperation, Zhou Nan had to temporarily put down the "Soul Refining Technique" and concentrate on cultivating the "Zhimu Decision" to improve his cultivation. But now, if he wants to cast and refine the magic weapon again, then the "Refining Soul Formula" has to be picked up again. This is the foundation of his casting technique, if he discards it, he will not be cultivating. The little thing that Zhou Hao left him will be completely abandoned, which is what Zhou Nan does not want to see.

Besides, Zhou Nan really likes casting, and if he wants to put it down, he can't do it.

Running the "Soul Refining Technique", Zhou Nan only felt that in the meridians, a strange air flow slowly generated, and then converged to his left hand. At this time, if he opened his eyes and looked, he would have noticed. His left hand was exuding a rich black glow, which overshadowed all the colors around him for a while. Even the fiery red of the earth's fire was obscured.

At this moment, it was as if darkness had come in the cavern, covering the earth. All the light has lost its original luster, and there is no longer any color. Suddenly there was only pitch black in the cave, and it was pitch black to the bone.

The black mangs tumbled, and in a month's time, they slowly left.

Two days later, Zhou Nan took the work and let out a long breath. I only feel that the cultivation of the "Refining Soul Formula" this time is very enjoyable. This kind of feeling has never been felt in the past when I practiced "Zhimu Decision".

After enjoying it for a while, Zhou Nan looked down at his left hand, only to see that it became even darker and deeper.

The previous pitch black is still on the surface of the left hand. But now, the darkness seeped into his bones and became more restrained. He swung his flying sword and slashed it in his hand, but he didn't hurt at all. Seeing this, Zhou Nan nodded thoughtfully.