In the spacious room, the lighting is a little dim.

A two-meter-long stove is placed in the middle of the room, and the bronze color of the stove looks simple and atmospheric, and there are many gorgeous reliefs carved on it. There is an octagonal crystal mirror in the middle of the furnace, which is used to observe the situation in the furnace, and the gossip pattern carved around the crystal wall gives people a very mysterious feeling, as if something is hidden inside.

Gu Nian held the Moon Shadow Spirit Sword and stood in front of the furnace ding. With a wave of the robe, the lid of the furnace was opened, and as soon as the hand was raised, the Moon Shadow Spirit Sword was thrown into the furnace.

His hands pressed on the surface of the furnace, and the spiritual power surged, and a hot flame rose from the furnace. Look through the mirror to see the Moon Shadow Spirit Sword inside.

The Moon Shadow Spirit Sword that was quietly hanging in the furnace was quickly burning to the point of redness, which showed that the temperature in the furnace was already high to a certain extent, but Feng Yi couldn't feel the temperature coming from the furnace at all, which showed that the quality of this furnace was quite high.

After scorching for nearly an hour, the silver-white Moon Shadow Spirit Sword had turned orange-red, and it emitted a dazzling light.

At this time, Master Gu Nian let go of a hand, and with a wave of his robe, the soul purifying stone on the table flew into Gu Nian's hand. The palm of his hand shook slightly on the road, and the lid of the furnace flew up.

A scorching temperature surged out in an instant, and the temperature of the entire room instantly rose by dozens of degrees, and Feng Yi had to use the spiritual power in his body to resist this heat wave.

As soon as Master Gu Nian raised his hand, he threw the Soul Purifying Stone into the furnace ding, and the furnace lid was closed again. Master Gu Nian pressed his hands on the surface of the furnace again, and the spiritual power in his body surged, and the flames in the furnace rose again.

At this time, the space inside the furnace was divided into two parts, one part was the Moon Shadow Spirit Sword, and the other part was the Soul Purifying Stone. From the crystal mirror, it can be clearly seen that the temperature of the two parts is completely different.

The flames of the Moon Shadow Spirit Sword were much smaller than the flames on the Soul Purifying Stone, and achieving this level in a furnace was quite a high requirement for the refiner's control of spiritual power, and at the same time, the requirements for the refiner's soul power were also quite high.

After another hour, the soul purifying stone in the furnace had melted away and turned into a transparent liquid.

Gradually, under the control of Master Gu Nian, the Moon Shadow Spirit Sword and the liquid made of Soul Purifying Fossil gradually fused.

When the Soul Purifying Stone and the Moon Shadow Spirit Sword were completely fused, Master Gu Nian opened the lid of the furnace again, picked up a piece of the dragon scales of the Nether Heavenly Dragon, and threw it into it.

The moment it entered the furnace, the spirit tablet turned into a purple-black ball of light, and instantly submerged into the Moon Shadow Spirit Sword.

Master Gu Nian's originally relaxed face instantly became solemn, his hands left the stove, and the practice of sealing in his hands changed, and a mysterious spiritual power rune appeared in front of Master Gu Nian.

"How can this rune be like a rune condensed by a spirit pattern?" Looking at the golden rune formed in front of Master Gu Nian, Feng Yi had some doubts in his heart.

Melt!

Master Gu Nian let out a low shout, and the spiritual power rune was smashed into the furnace and imprinted on the ball of light formed by dragon scales.

After the golden rune was printed on the purple-black light cluster, it instantly turned into a golden silk thread, winding the light cluster and embedding it on the Moon Shadow Spirit Sword.

The Moon Shadow Spirit Sword, which originally emitted a crimson light, suddenly emitted a purple-black light, and in that deep purple-black light, a golden light appeared.

Slowly reducing the input of spiritual power, the flames in the furnace tripod gradually decreased, and after the Moon Shadow Spirit Sword was warmed in the furnace tripod for a while, Gu Nian's sleeve robe waved, and the furnace tripod was lifted.

A vague sound of a dragon's groan came from inside the furnace, and a purple-black light shone out from the furnace, turning into a dragon shape!

When the pillar of light dissipated, the Moon Shadow Spirit Sword hovered above the furnace ding. With a wave of his robe, the Moon Shadow Spirit Sword came into the hands of Master Gu Nian. After a slight look at the Moon Shadow Spirit Sword in his hand, Gu Nian's face showed a look of satisfaction.

"Here, take a look. Handing the Moon Shadow Spirit Sword to Feng Yi, Gu Nian spoke.

The Moon Shadow Spirit Sword was gone, and instead of the original feeling of coldness, there was a feeling of warmth. The silver-white blade of the sword turned purple-black, and in the middle of the blade was a golden dragon-shaped pattern. The Moon Shadow Spirit Sword, which was originally about three feet long, grew to almost four feet in length.

"It's really worthy of Master Gu Nian, and he actually repaired the Moon Shadow Spirit Sword to the level of the best of the Xuan level!" Feng Yi couldn't help but admire as he looked at Tezuka's Moon Shadow Spirit Sword.

"Hehe, it's okay. Gu Nian put his hands behind his back, and his expression showed a hint of joy. Obviously, I am still satisfied with my restoration results.

"Master Gu Nian, what was the rune you constructed when you repaired the Moon Shadow Spirit Sword just now?" Feng Yi asked with some curiosity, the rune that Gu Nian constructed just now was very similar to the spirit seal condensed by the spirit pattern when he built the spirit array.

"That rune is a rune, which is used to assist in refining, which is a unique refining skill of my vein refiner. It is said that this rune was born from the ancient rune array, but who knows the real situation, after all, after so many years, the rune array has long been extinct on the mainland. Master Gu Nian explained to Feng Yi with a smile.

I see, I originally thought that this Gu Nian master might be the successor of the way of the formation, but now it seems that I have thought too much, Feng Yi thought secretly.

After that, Feng Yi chatted with Master Gu Nian for a while, and then left Master Gu Nian's room. After leaving the room, Feng Yi found that Tang Yun was still waiting at the door.

"The Moon Shadow Spirit Sword has been repaired?" After seeing Feng Yi come out, Tang Yun smiled with a smile.

"Thank you, Sister Tang Yun. Smiling at Tang Yun, Feng Yi leaned over and said.

"You call me sister, this little sister is naturally going to help. Stroking her hair, Tang Yun winked at Feng Yi.

Feng Yi instantly felt a strong electric current penetrate his body in an instant, and the whole person became crispy and numb, but fortunately, Feng Yi's concentration was still relatively strong, and he did not show his ugliness, otherwise he would lose his life.

Hmph, you dare to tempt me like this, it seems that I can't do it without giving you some color, Feng Yi's mind flashed an evil thought.

A wicked smile appeared at the corner of his mouth, Feng Yi walked in front of Tang Yun, raised his right hand and pressed it on the wall behind Tang Yun, and his left hand gently provoked Tang Yun's delicate chin.

"Sister Tang Yun, you tempt me so much, I think I, as a normal man, should I do something. Feng Yi smiled wickedly.

"Oh, what do you want to do?" Tang Yun leaned against the wall, put her hands around Feng Yi's neck, and smiled charmingly. At that moment, Feng Yi was a little stunned.