Qin Xin looked at Danqing pacing back and forth in front of him, feeling slightly nervous.

After all, the object within this piece of iron was capable of causing fluctuations in the mysterious fragment of the diagram in his Niwan Palace, so it must not be an ordinary object.

After Danqing stopped, he handed the iron piece to Qin Xin. He seemed to have found nothing in it and said with some helplessness, "Why don't you burn it with Yang Fire?"

Seeing that Danqing hadn't figured anything out either, Qin Xin looked somewhat disappointed.

However, he still listened to Danqing's advice. With a thought, the Yang Fire Seed contained in the Heavenly Phoenix Martial Spirit Pattern was directly activated, and orange flames quickly ignited in Qin Xin's palm.

The rusted iron sheet seemed to remain unchanged under the influence of the Yang Fire.

Qin Xin was somewhat surprised by the iron sheet's fire resistance, so he accelerated the roasting with yang fire.

"call!"

"call!"

About fifteen minutes later, the rusted iron sheet had turned red-hot and showed no signs of melting.

Feeling somewhat tired, Qin Xin stopped scorching the flames in his hands.

In just a moment, the iron sheet returned to its original state; Qin Xin's previous use of Yang Fire to heat it had had no effect whatsoever.

"What kind of junk is this!" Qin Xin was also a little annoyed and threw the iron sheet aside.

He was about to come into contact with that strange fire and needed to find two other main ingredients for refining pills to subdue it, so he didn't have much time to focus on this piece of iron of unknown origin.

Qin Xin decided to give up and do the research later when he had free time.

However, Danqing seemed to have discovered something at this moment, and a glint flashed in his eyes.

With a light tap of his finger, the piece of iron that he had tossed aside slowly floated back.

"Just as I thought!" Danqing's face showed a hint of something as he examined the changes in the iron plate. Then, a golden flame appeared from his body. Under its powerful pressure, Qin Xin could feel his Yang Fire Seed, which had been fused with the Heavenly Phoenix Martial Spirit Pattern, trembling continuously.

The fire of life is far more terrifying than the fire of yang.

The moment it appeared, the rusted iron sheet turned bright red.

The rust on the iron sheet was beginning to show signs of melting.

As the rust fades, the original shape of the iron sheet gradually emerges, revealing numerous patterns that create a mysterious design.

"It's actually an array pattern, and a sword array at that!"

Danqing let out a gasp of surprise.

"Array patterns? Sword array?" Qin Xin asked, puzzled.

Danqing then explained, "In this vast world, there are different ways of cultivation, which naturally lead to different professions, such as alchemists, weapon refiners, formation masters, beast tamers, and so on."

"You probably know something about array masters. For example, those spirit talismans were made by these array masters. The spirit talismans contain powerful arrays that can unleash powerful energy in an instant."

"This piece of iron in front of us must have been left by a very powerful array master, and also a highly skilled sword cultivator."

Danqing sighed repeatedly, feeling a surge of joy at this unexpected gain. "It seems this powerful sword cultivator didn't want his sword formation to be lost, which is why he placed it in this piece of iron."

"Take out your Nine Flames Battle Immortal Staff and place it on this iron plate," Danqing then said.

With a thought, Qin Xin took out the Nine Flames Battle Immortal Staff from his spatial ring, glanced at Dan Qing, and said, "Teacher, is there any problem?"

Ouch!

Unexpectedly, Danqing stepped forward and kicked Qin Xin, saying as if he was disappointed in him, "What problem could there be? If your master didn't lack a physical body, would you even be in this sword formation!"

Qin Xin chuckled and raised the Nine Flames Battle Immortal Staff in his hand, bringing it close to the iron plate floating in mid-air.

"Buzz!"

The Nine Flames Battle Immortal Staff trembled, as did the iron plate, as if they both sensed each other's presence.

"Huh!"

Originally in the form of a staff, it transformed directly into the form of a sword without Qin Xin's control.

Meanwhile, the mysterious cluster within the iron sheet directly merged into the Nine Flames Battle Immortal Sword.

The original three-foot-long sword now seemed even more complete, with several patterns flowing across the blade and returning to the hilt, creating a sense of perfect harmony.

The iron pieces, now devoid of the sword formation, instantly turned to dust and fell to the ground.

As Qin Xin held the Nine Flames Battle Immortal Sword in his hand, a message immediately entered his Niwan Palace after he had just injected a wisp of true energy into it.

"Sword Formation: Nine Heavens Thunderfire!"

The spiritual consciousness within the Niwan Palace suddenly converged towards the mysterious fragment of the map.

The small, illusory figure sitting cross-legged on the Spirit-Devouring Stone was now surrounded by images that were coalescing in front of him.

An elderly man in a long robe, wielding a long sword, plunged the sword straight into the ground. Countless array patterns instantly surged outwards, encompassing an area of ​​tens of thousands of miles.

Then, Wu Ling's rolling thunder and flames continued to fall, terrifying as if it were destroying the heavens and earth.

After the image disappeared, Qin Xin felt a wave of dizziness before he came to his senses.

Danqing looked at Qin Xin, who had emerged from his daze, and couldn't help but ask curiously, "How was the sword formation?"

Qin Xin opened his mouth, but only said one sentence, "Very strong! The sword formation is called Nine Heavens Thunderfire."

Danqing smiled more at Qin Xin's answer and said, "Nine Heavens Thunderfire! A very imposing name. Controlling this thing will probably not be so simple. I'll need to practice more in the future."

Qin Xin nodded and put away the Nine Flames Battle Immortal Sword in his hand.

After the sword formation was integrated, Qin Xin was unable to change its form, and he always felt that the sword's form was its original form.

Feeling a sense of emptiness in his Niwan Palace, Qin Xin quickly climbed onto the bed and sat down. Under the automatic operation of the Supreme Derivation Divine Technique, and with the refinement of the Spirit Devouring Stone, his spiritual consciousness, which had been absorbed by the mysterious fragment of the map, slowly recovered.

With some time still remaining before dawn, Qin Xin took out the Fire Spirit Spike and the Earth Core Stone Milk.

Danqing felt a pang of envy for Qin Xin's possession of these two things, but unfortunately, he was currently only a spirit and could not enjoy them at all.

Moreover, the Fire Spirit Spike that Qin Xin planted within the mysterious fragment of the map has now taken root and sprouted, growing green stalks.

Danqing also told him that there seemed to be a unique energy in this mysterious fragment of the map that could accelerate the growth of spiritual herbs here. Unfortunately, the space in the mysterious fragment of the map was limited, and there wasn't much spiritual soil left to grow spiritual herbs, so large-scale planting had not been possible for a long time.

However, Qin Xin was already satisfied.

After swallowing two Fire Spirit Spikes and feeling the spiritual energy flowing continuously within his full body, Qin Xin sat down and began cultivating.