The whole seven days, in the blazing thunder light, in the continuous roar, slowly passed.

At this time, in the thunder pool, the five flying swords were no longer as dark as they were at the beginning. Instead, they became red and fiery like iron objects placed in an extremely high temperature furnace.

The thunder pool in the sky, over time, finally changed the color of the five flying swords, but only changed the color. Its hardness has not changed, and there is no sign of softness.

Nie Chen was holding thunder and lightning. His face was pale, and his whole body was full of evil Qi, as if he was healing. Seven days later, he lost too much blood, a feeling of weakness, quietly produced.

But despite his weakness, a string of blood on his right hand never stopped flowing towards the minefield. Nie dust biting teeth, in the desperate persistence.

Through all the hardships, he came firmly. He had never had a trace of fear. How could this weak feeling make him shrink back?

However, the Kung Fu pays off. In the flying sword, Nie Chen's blood is infused into it; especially after the five flying swords have become iron red, the speed of blood refining into the body of the sword is much faster than before.

In the meantime, Nie Chen once again used eight thunder clouds, but in the fierce shaking of the world, he finally gave up the idea of continuing to draw thunder.

However, the newly added eight thunderbolts keep the thunder pool in that hot state. The thunder power used for sword refining has not been weakened.

"Is this feeling the effect of reaching the first level of the art of sacrifice and refining?" Nie Chen's pale face showed a sense of excitement in his eyes. In his heart, he clearly felt the meaning of manipulation.

The five flying swords in the thunder pool, with the blood of Nie dust refining and condensation, became more and more close to the first state of the art of sacrifice and refining, that is, the degree of control.

It can be seen that there is a bright red stripe on each of the five flying swords of Tiehong, which is even more conspicuous and eye-catching than the original iron red of the sword body. This is the blood brand of Nie Chen that coagulates into it little by little.

The imprint is slender, showing the shape of a lightning mark, almost complete. In addition to the part near the tip of the sword, there is still a sharp corner of lightning, which is not condensed out.

Although the brand was not complete, Nie Chen felt that the five flying swords were completely in his control. There was even a feeling that these five flying swords were almost part of his body. They were controlled by his heart and were closely connected, but they were not connected with his body.

"The power of Lei Chi is going to be weak!" Nie dust face color a horizontal, urge the blood between the fingers, into the whole blood line, directly toward the thunder pool gurgle flow.

With the influx of Nie Chen's blood, at the moment when the power of the thunder pool reached its peak, the lightning shaped imprint on the five flying swords was quickly completed at a speed visible to the naked eye.

At this moment, the incomplete and incomplete tip of the sword slowly spread, and gradually condensed the lightning mark, the two ends of which were symmetrical, and the missing tip.

In Nie Chen's excited eyes, the lightning tip is finally complete, and a complete lightning imprint is completely presented.

"Hum!" Five iron red flying swords, at the moment when their marks were complete, made a trembling sound. In an instant, the end of the hilt and the tip of the blade were connected to each other. Suddenly, they arranged into a circle and began to rotate in an instant.

"Buzz!" Five flying swords form a circle and keep turning, and the speed of its rotation is faster and faster. Soon, in Nie Chen's eyes, there was only an iron red aperture.

The buzzing sound, at the moment, has surpassed the thundering of the sky, reverberating in this world.

And that thunder pool, actually also began to rotate, finally around the middle of the aperture, turned into a thunder vortex.

Nie Chen was shocked in his heart, and quickly put away his right hand and stopped the supply of blood, because the thunder in his hand was also involved in the whirlpool of thunder.

In Nie Chen's eyes, the whirlpool hummed and turned, and the speed reached the extreme. Finally, the aperture and the thunder pool seemed to have turned into substance, stopped turning and became a stagnant picture.

But the buzzing sound that made Nie Chen's ears ache and his brain roar tells Nie Chen that the picture is actually spinning at a high speed, but his naked eye can't see clearly.

Ding!

Suddenly, a sound of collision came, and a segment of the diaphragm connected with the thunderstorm pool whirlpool was suddenly missing. The missing section is just the length of a big sword,

Ding! Ding! Ding! Ding!

Four times in a row, the same impact sound came. In Nie Chen's incredible eyes, in the violent shaking of the world, the diaphragm lost four segments for four times in a row.

The last part, equal to the length of a big sword, suddenly stopped. A big iron red sword appeared in Nie Chen's eyes.

Five iron red flying swords, in high-speed rotation, automatically overlap together, and finally turned into such a unique big sword.

"Boom!" As soon as the sword appeared, it was madly absorbing the thunder of the whirling thunder pool. Suddenly, a wave spread to all directions.Nie dust was shocked by this wave and fell towards the lower part of the void. After a long time, he stopped his body. The iron red sword in the sky, incredibly, absorbed the power of all the thunder pools around.

Quiet, the thunder's roar has disappeared, the buzz has also stopped In the sky, the iron red color of the big iron red sword gradually faded, revealing the dark red and some dark body of the sword.

The sword, with its creaking thunder, became the only scenery between heaven and earth after some turbulence.

"Ha ha ha ha!" Nie Chen's laughter broke the silence of the situation. His laughter was filled with uncontrollable excitement.

Nie dust laughs, a step jump up, toward the sky that big sword but go, its mouth in Lang voice way: "come!"

Hum, the big sword in the sky, under his voice, it trembled and turned into a faint light. Suddenly, it struck, and with a clank, it was caught by Nie Chen.

This sword has a long body, but from a local point of view, it is very broad and thick, and its length conceals its heavy appearance. A common sword is only three feet long, but this one is at least four feet long.

Nie Chen felt that if he put the sword on the ground, its height would be enough to reach his shoulder. It can be seen that the sword is indeed very long.

The blade of this sword is very thick, but the edge is also very sharp. The black and red side plane of the sword body is covered with regular grooves, which are similar to blood tanks for bloodletting.

Nie Chen held it in his hand, which made him feel thick and steady. To his satisfaction, the weight of the sword is in his hands and can be manipulated at will.

Then he adjusted the weight to a point where it was light and not very heavy, but powerful, just right!

"Ha ha! It's really different, it seems Nie Chen looked at the big sword in his hand and showed a look of great love.

"You are by no means an ordinary thing. From now on, you will be my Nie Chen's match sword!" His joy is beyond words.

"Since you can absorb the power of thunder, so as to produce evolution, five swords in one; in the future, if you can grow, I will try my best to meet your needs!" Nie Chen was very happy to see the thunder and lightning on the dark red sword.

The mark of lightning, from the moment Nie Chen took it in his hand, suddenly disappeared in the depth of the sword.

Since then, Nie Chen succeeded in refining the five flying swords. To his surprise, the five flying swords became a more extraordinary sword.

His imprint on the body of the sword is integrated in the fierce way of the thunder of the nine days. It is almost impossible for anyone to erase it.

Although the thunder of this piece of heaven and earth is not as good as that of the outside world, it is still the category of thunder level, which can not be resisted and ignored by various friars.

"Move Nie Chen let go of the flying sword and let it spin around freely. He was very satisfied with his manipulation. At last, the sword stopped, went straight down and fell.

"Boom The sword was inserted into the ground and broke into the depth of the ground, hitting a huge pit three feet wide. The pit suddenly spread around, lifting layers of white bones and gravel soil, like a storm swept around.

The sword is independent of the pit. Thunder light looms on the sword, which is detached and outstanding.

"If you just drop it at will, you will have such prestige. It seems that you have not paid so much blood and energy in vain!" Nie Chen smiles and falls to the edge of the sword. His right hand is on the shaft of the sword handle.

He and his sword, two figures together empty light, space distortion, disappear, only a huge pit.

Above the array altar, Nie Chen's figure is empty and light, and the figure is solid. The big sword, shrunk by him, remained in a vein on the back of his right hand. This sword has been melted by his blood. It has been separated from you and me, so that it can stay in the blood, and it will not affect Nie Chen at all.

As long as he thought, the sword would turn into a bloody light in an instant, just to pierce a tiny hole in his skin like a needle eye!

This is the best way to keep the sword. In this way, he can quickly and secretly call it out for his own use!

Nie Chen's face was very pale. This sacrifice consumed him too much blood!

He sat on the altar beside him and slowly recovered. In his hand, he held an incomplete spirit stone. This is the one he has used before and has never consumed clean. At the moment, combined with his amazing self recovery ability, it is enough for him to slowly recover those lost Qi and blood.

"Up to now, the spirit stone has almost run out, and only 20 of the best spirit stones are left. There are only a few precious ones left Nie Chen's eyes twinkled, while he breathed and meditated. "I don't know what is hidden in those boxes in the jade lotus stage of Qinglian?"

Nie Chen felt that it was necessary to check when the blood gas recovered!

"In the field just now, the strength is a little overdrawn, but it is impossible to use it any more." Nie Chen said to himself: "brother Ling said that many of these space layers collapsed in that war. It's as good as the world just now, but there are only three left. "

In Nie Chen's heart, there is an idea that needs to be verified; if he succeeds, his cultivation will surely get a qualitative leap!