Chapter 921 Ten thousand years ago, the battle between immortals and demons reappeared!

Three days later, the wind was calm and the sun was beautiful, and the sky was as blue as a gem.

With a serious look on his face, Li Congxin took his two female apprentices, Zhao Ling'er and Jin Lala, on the road to the Immortal World and Tianzhiya!

Zhao Ling'er and Jin Lala both looked a little weak. They followed Li Congxin closely, feeling both expectant and nervous.

"Master, can we really repair our spiritual roots and regain our cultivation here?" Zhao Ling'er asked softly, with hope shining in her eyes.

Li Congxin looked back at them and said softly: "Don't worry, Ling'er, the jade pond here has magical power and will definitely help you!"

Jin Lala also nodded vigorously, as if to cheer herself up.

After a long journey, they finally arrived at Tianzhiya.

There are clouds and mist here, a mysterious and peaceful scene.

Ahead, the legendary jade pond that cleanses the soul is sparkling, emitting a soft light!

Roar!

However, when they were about to step into this place, suddenly, a low roar came.

A black dragon suddenly burst out of the clouds and blocked their way!

Li Congxin frowned and thought to himself: "This dragon has arrived at the right time."

The black dragon opened its teeth and claws, and its eyes revealed a fierce light.

"Humph, humans, this is not a place you can break into casually!" Jiaolong made a deep voice.

Li Congxin sneered: "Today we have to enter the Yuchi. If you stop us, don't blame me for being rude!"

As he spoke, Li Congxin pulled out the invincible iron sword from his back, and the sword flashed with cold light.

Zhao Ling'er and Jin Lala hid behind Li Congxin, their hearts filled with worry.

Li Congxin's eyes were firm, and he walked towards Jiaolong step by step, thinking in his heart: "We must solve it as soon as possible, and we cannot delay the recovery of Ling'er and Lala."

Seeing this, the dragon roared angrily and rushed towards Li Congxin.

Li Congxin dodged sideways, swung the iron sword in his hand, and slashed towards the dragon with a sharp sword energy!

Jiaolong dodged flexibly, but was still scratched by the sword energy.

"Damn it! How dare you hurt me!" Jiaolong roared angrily.

Li Congxin did not flinch at all, and continued to wield the iron sword, launching a fierce battle with the dragon.

"Ling'er, Lala, stay away!" Li Congxin shouted.

Zhao Ling'er and Jin Lala quickly retreated and watched nervously the battle between Li Congxin and Jiaolong.

Soon, Li Congxin gradually gained the upper hand, and his sword skills became more and more powerful, making it difficult for Jiaolong to resist.

"Suffer death!" Li Congxin shouted, and slashed at the dragon with the iron sword in his hand.

With a "pop" sound, the black dragon was cut into two pieces by Li Congxin's sword and fell to the ground with blood flowing.

Li Congxin breathed a sigh of relief, then turned to Zhao Ling'er and Jin Lala and said, "It's okay, let's go there quickly!"

Zhao Ling'er and Jin Lala nodded and followed Li Congxin to the jade pond.

An hour later, Li Congxin carefully put the sleeping Zhao Ling'er and Jin Lala into the jade pond, watching them floating quietly in the water, praying silently in his heart.

"I hope you will get better soon." Li Congxin said softly.

Afterwards, Li Congxin found a place to sit down by the jade pond and guarded them quietly.

Time passed by minute by second, and at this moment, Li Congxin suddenly noticed something strange in the cave not far from Yuchi!

A mysterious aura came out, which shocked him.

"This smell... is so familiar." Li Congxin frowned and thought to himself, "Is there any iron in the cave?"

Li Congxin held the invincible iron sword tightly, stood up, and walked slowly towards the cave.

His heart was full of vigilance and he was extra careful with every step he took.

As he approached the cave, the aura became stronger and stronger, and the invincible iron sword began to tremble slightly.

"Sure enough, there is something weird." Li Congxin thought to himself.

He took a deep breath and walked slowly into the cave.

The light in the cave was dim, but Li Congxin's eyesight was excellent, and he could clearly see the scene inside!

Deep in the cave, there was a group of light flickering, and that familiar aura came from there.

Li Congxin approached cautiously, always keeping vigilance with the iron sword in his hand.

When he finally saw what was in the light, a trace of surprise flashed in his eyes.

"It's really a piece of iron!" Li Congxin was very excited.

He stretched out his hand to grab the piece of iron, but at this moment, the piece of iron suddenly released a powerful force, shaking Li Congxin back a few steps.

"Humph, it's really not that easy to get." Li Congxin said secretly.

He stabilized his body and walked towards the iron piece again.

This time, deal with the power released by the iron piece more carefully!

After some hard work, Li Congxin finally succeeded in getting the iron piece. He observed the iron piece carefully and his heart was filled with joy.

"With this piece of iron, my invincible iron sword will be even more powerful!" Li Congxin thought in his heart.

So he took the time and sat cross-legged, with the precious piece of iron and the invincible iron sword in front of him!

Li Congxin's eyes showed determination and perseverance, and he said secretly in his heart: "We must successfully integrate the iron piece into the iron sword."

Then he took a deep breath, danced with his hands, and mobilized the real fire in his body. The real fire burned blazingly, emitting a blazing temperature!

He carefully placed the piece of iron in the real fire and began to smelt it.

"It must succeed!" Li Congxin prayed silently in his heart.

As time passed, the iron sheet gradually softened in the true fire, but it was not easy to perfectly integrate it into the iron sword.

In the first attempt, Li Congxin looked at the iron sheet and the iron sword nervously, full of expectations!

He carefully controlled the true fire and tried to fuse the iron sheet with the iron sword.

However, when he brought the iron sheet close to the iron sword, he found that there seemed to be an invisible repulsive force between the two, and the iron sheet was bounced away!

"Damn, how could this happen?" Li Congxin frowned, feeling a little annoyed.

He did not give up, adjusted his state again, and prepared for a second attempt.

"It will definitely work this time!" Li Congxin secretly encouraged himself.

He controlled the true fire more attentively, allowing the iron sheet to be melted more thoroughly in the true fire, and tried to integrate the iron sheet into the iron sword again.

"Take your time, don't be anxious!" Li Congxin warned himself in his heart.

However, the result was still unsatisfactory, and the iron sheet still failed to successfully integrate into the iron sword.

Li Congxin showed a trace of frustration on his face, but he quickly cheered up.

"I can't just give up like this, there must be a way!" Li Congxin said with gritted teeth.

He began to think carefully about each step and analyze the reasons for failure.

After some thought, he realized that it might be that the temperature of his true fire was not enough, or the timing of fusion was wrong?

Boom!

So, Li Congxin began to constantly adjust the temperature of the true fire and his own operation techniques.

Failure after failure made Li Congxin a little anxious.

"Is it really not possible?" He asked secretly in his heart.

But he quickly put aside these negative emotions and continued to focus on refining.

After countless failures, Li Congxin finally ushered in the dawn of success!

This time, when he brought the iron sheet close to the iron sword, the repulsion between the two seemed to be much weaker.

"There is a chance!" Li Congxin was delighted.

He carefully controlled the iron sheet and integrated it into the iron sword bit by bit.

Finally, the iron sheet was completely integrated into the iron sword, and a smile appeared on Li Congxin's face.

"Success!"

Buzz!

At this time, the invincible iron sword exuded a more mysterious aura, and a trace of mysterious power appeared on the sword body.

Li Congxin looked at the invincible iron sword in his hand with joy, and his heart was full of a sense of accomplishment.

At this moment, a strange light suddenly appeared on the iron sword, and there seemed to be a picture flashing in the light!

Li Congxin was shocked, and he looked closely, and saw an illusion on the iron sword.

It was the battle between immortals and demons tens of thousands of years ago. On the battlefield, the immortals and demons fought fiercely, various magic weapons shone, and magic spells flew all over the sky...

Li Congxin was deeply attracted by this scene, as if he was there, and felt the cruelty and shock of the battle.

On the battlefield, immortals and demons used all their tricks and fought desperately.

There were thunder and lightning in the sky, and the earth was shaking!

"Is this the battle between immortals and demons in ancient times?" Li Congxin exclaimed secretly.

As the picture progressed, the battle became more and more intense, and both sides suffered heavy losses!

However, just when both the immortals and the demons were losing, some strange creatures suddenly appeared on the battlefield.

These creatures have different shapes and exude evil auras!

Their appearance instantly changed the situation on the entire battlefield!