The iron of yin, the iron of yin, is so evil that ordinary people can't control it at all. Forcibly using it, it will only erase its own vitality, become a short-lived ghost, and meet the god of death early.

Yin Iron can be used for refining weapons, and it is a good material.

But if that's just the case, how can it be worth Zhou Nan's joy and excitement?

The reason why he is so urgent is because the sealed dragon coffin is equipped with Yin iron, which will be qualitatively transformed into the greatest value.

opened the sealed dragon coffin, took out Bu Wan'er, and gently placed it on the bed. After checking it out, I saw that she didn't have anything serious. Zhou Nan took the sealed dragon coffin and the evil yin iron, rushed into the secret room, opened his eyes, and pounded hard.

The secret treasure of the sealed dragon coffin is of a very high grade. Although I don't know what the reason is, it was finally reduced to a coffin that could only be placed in a black zombie. But as long as certain conditions are met, the shackles of silence for countless years are untied. Then this secret treasure can be upgraded.

The value of the Yin Iron that Zhou Nan said is here.

The sealed dragon coffin at the level of magic weapons and spiritual weapons wants to be upgraded and restored to its original appearance. As long as the blood color and black chains of the first and second layers of the White Bone Altar are refined.

But if you want to raise the Sealed Dragon Coffin to the magic weapon level, you need to use other means.

The blood is in the front, the black is in the after, and then the yin is needed. Zhou Nan thought of this kind of truth very early.

But it's a pity that the world is so big, although there are many bloody evils, there are also many black evils. But this thing is too rare. The rare ones are shocking, even compared to the elixir of ten thousand years. It is also precious three points, rare three points, and even more terrible three points.

Therefore. Even if you know it early, the sealed dragon coffin can be upgraded. But for the idea of raising the sealed dragon coffin to the magic weapon level, Zhou Nan only thought about it in a dream, and gave up after waking up. After all, there are some things that are just too unrealistic.

But who would have thought that luck had come and the time had come. There was a chance. These many unexpected things will appear around you inexplicably. And the evil yin iron, for Zhou Nan, who is carrying a sealed dragon coffin. That's the kind of thing.

Pressing his urgency, Zhou Nan took a few deep breaths, opened the sealed dragon coffin, and jumped in. The lid of the coffin was closed.

Sitting in the coffin of the sealed dragon. Zhou Nan gathered his mind, took out the Yin Iron and his face became solemn.

With his current strength, the existence of the early stage cultivators of the Jiedan without falling behind, and the identity of the refining master, it stands to reason that it is not difficult to complete the upgrade of the sealed dragon coffin.

But this thing is shady. It's just weird. There are only a few words about it. To say it is to say nothing. If you don't know the way, it's always better to be careful.

After waiting for a while, I thought about the helplessness when I was threatened, and scolded a few words at the two old things that came to mind, Donglinjiashang and Xiguimen. Zhou Nan gritted his teeth and exerted his strength, and with a crisp sound of 'bang', he crushed the Yin Iron in his hand.

Suddenly, with a piercing whimper, an invisible fluctuation filled the coffin.

The feeling of being cloudy, the coldness to the bone, didn't stay for a while, Rao is Zhou Nan's heart, and he was scared from the deepest part of his heart. In the dark, like a terrible ghost, lying on your shoulder, although you can't see it, but it is real.

"Seal the dragon coffin, refining!" After shaking for a while, Zhou Nan shouted, then stabilized his body, and ran the "Soul Determination" through the four chains in his left hand, communicating with the sealed dragon coffin, refining the formless and qualitative yin in the hanging.

As Zhou Nan continued to exert strength, after a while, the sealed dragon coffin shook slightly, and it emitted a dazzling blood glow. In the flickering of blood, the sealed dragon coffin contained Zhou Nan, and in the secret room, along a strange trajectory, it twisted quickly.

In the coffin, after less than half a cup of tea, Zhou Nan's face turned pale, and he spit out a mouthful of blood.

He only felt that invisibly, there was a steel file, polishing his bones. The sound of 'quack' made the listeners heartbroken for a while, and the ghosts cried for a while. Especially when this feeling comes from your own body, it is even more terrifying.

Constantly opening his mouth, Zhou Nan clutched his body tightly, not daring to stop for a moment.

Time is precious, early death and early reincarnation. With the vigorous operation of "Soul Determination", a large amount of energy was injected into the coffin.

Xu was a second, and it seemed that 10,000 years had passed, just when Zhou Nan gritted his teeth and almost collapsed. The sealed dragon coffin shook again, and the blood flickered, and it slowly stopped.

At the same time, the yin in the coffin, the feeling of the evil ghost asking for his life, also disappeared suddenly.

"Huh, damn it, it's finally come to an end, it's really comfortable!" Gritting his teeth and wiping the cold sweat on his forehead, Zhou Nan quickly took off his clothes as if they had been soaked in water, and shouted loudly.

After resting for a while and swallowing some elixir, Zhou Nan started the "Soul Refining Decision" and used psychic means to enter the blood-colored space in the sealed dragon coffin. Entering here again, Zhou Nan's expression was awe-inspiring, and he obviously felt a little different.

The blood around them was more, thicker, and more powerful than before. Rao was with the strength of his divine soul, and unconsciously, he was also affected by something. But fortunately, he was no longer what he used to be, so he rushed to the Bone Altar with blood.

After a cup of tea, crossing the corpse mountain and sea of blood, accustomed to seeing blood and blood, Zhou Nan finally came to the white bone altar.

Looking up at the altar suspended in the air, Zhou Nan took a deep breath and flew up quickly.

Walked into the first floor, passed through the second floor, took a look at the familiar environment, and touched the friendly black chains. Zhou Nan stopped staying, followed the steps, and climbed to the third floor under the pressure that was not too great.

But unfortunately, before he could take a few steps, his face changed, and with a 'bang', he fell to his knees stiffly. In just a few steps, the resistance on this was increased tenfold, even with Zhou Nan's divine soul strength, it was almost crushed into powder.

"Damn, ah!" scolded Zhou Nan, gritting his teeth, stubbornly bone, swaying his steps, and following the steps, under the pressure that was even more crazy than exponential growth. With a frantic look, he climbed towards the tower.

One step, one step, one step at a time

Time passed slowly. I don't know how long I walked, Zhou Nan Zhihai was suddenly shocked, and within the green ball of light, a round of silver-white crescent moon inlaid with gold edges slowly emerged.

After the mysterious crescent moon appeared, it was just a slippery turn, and it directly crossed the barrier of time and space. Following Zhou Nan's left hand, he got into the white bone altar and attached to the body of 'Zhou Nan' composed of spiritual sense.

Suddenly. With a 'bang', Zhou Nan only felt that the pressure on his body was light. I didn't care about thinking about what this was for, so I took three steps and made two steps, and quickly rushed up to the third floor.

A moment later. The moment he approached the third floor. A cold snap suddenly hit, and the cold exploded the hairs all over his body.

Invisibly, an indescribable, inexplicable yin wind entangled itself, like a poisonous snake that hunts its prey, constantly watching. It took a long time for me to feel like this. before slowly retreating.

With a long sigh of relief, Zhou Nan turned his head. I looked at it carefully.

The rest of these three floors are no different from the first and second floors, except that in the middle of the altar, one meter above the ground, there is a pale silver chain suspended. The light flickered, one would disappear, the other would reappear, it was very bizarre, indescribably mysterious.

With the experience of the first two times, Zhou Nan rested for a while, then walked over and grabbed the silver chain with one hand.

Suddenly, with a dizzy whirlwind of the sky, the field of vision in front of him changed, and it became as black as ink.

"Low-level, is this set again, fighting spirit?" sneered sarcastically, Zhou Nan dragged his small ball of light-like body, wandered quickly in the black space, and took the initiative to search for his enemies.

Since it is inevitable to have a big fight, it is natural to take the initiative.

After a while, the light in front flashed, and a bright bright spot quickly enlarged in the eyes. After a while, the bright spot gradually became larger, and it quickly came to the front. Zhou Nan looked at it intently, this was a leopard with three horns on its head, very fierce.

When the two sides meet, they are naturally not here to talk. Needless to say, a big war is impossible to avoid.

The strength has been raised to the current level, and Zhou Nan is very confident in his divine soul.

Sure enough, although the comer was strong, it didn't take long for him to fall under Zhou Nan's bloody mouth.

In this way, Zhou Nan violently harvested in the black space at a rapid speed, under the effect of the silver crescent moon, as if it had been beaten with chicken blood.

One after another, Zhou Nan waved his body vigorously, fighting to his heart's content, completely forgetting himself.

The black space within this silver chain is very strange. All the souls who came up were just fighting alone, very graceful, and completely removed the previous means of group fighting.

The huge changes, the contrast like a mountain, made Zhou Nan uncomfortable for a while.

But fortunately, this situation is beneficial to him, and there is no need to worry about it.

Constantly killing, constantly fighting. Zhou Nan controlled his body and transformed into various shapes. With a bloody mouth, sharp teeth and claws, long swords and big knives, and eighteen kinds of weapons, he played all over again, and none of them fell.

With the help of the silver crescent moon, Zhou Nan was like a god possessing him. The speed of harvesting souls, that's called a fast. All the souls, in his hands, were nothing more than a breathless enemy, and in a few moments, they were slaughtered, and a large area was quickly emptied.

And Zhou Nan, who was in the middle of the killing, didn't realize that there was such a thing as a silver crescent moon on his body. He only knows the way, kills all the enemies, slaughters all the souls, and he is the victor.

Maintaining a fast speed, Zhou Nan kept killing for a moment. It's like a hungry wolf pounced on a flock, it's like entering a no-man's land. It didn't take long for the souls in the entire black space to be completely slaughtered.

After a long time, after swallowing the last soul in one bite, the black space shook suddenly, and the vision in front of him changed again.

In an instant, Zhou Nan felt his feet sinking, and he returned to the third floor of the altar again.

settled down, the corners of Zhou Nan's mouth unconsciously curled slightly, and his face was full of joy.

"Haha, after spending so much effort and enduring so much pain, I finally didn't waste this precious Yin Iron and successfully raised the Sealing Dragon Coffin to the level of a magic weapon. In this way, I am no longer so passive in this big competition. Zhou Nan stammered, laughing to his heart's content, venting the excitement in his heart.

As soon as the words fell, he slapped the silver chain, and pierced through the three layers of the altar, connecting the entire blood-colored space.

Touching the cold chains, Zhou Nan nodded with satisfaction, feeling extremely cordial, just like his own arm. (To be continued......)