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As Chu Xun expected, the bone change that Emperor Ao said was the ancestral dragon bone.

Chu Xun couldn't calm down at all in his heart.

Dragons, the whole body is a treasure, let alone an ancestral dragon.

If the bone replacement is successful, I am afraid that the physical strength alone can sweep away a group of enemies.

The first generation of ancestral dragons, his keel has been preserved to this day, probably millions of years old.

"Are you sure?"

Chu Xun asked, he forced himself to calm down, the ancestral dragon bone was incomparably powerful, but no one had ever tried to change bones, once it failed, the consequences would be unimaginable.

As the saying goes: opportunities and dangers coexist.

"In fact, I did not get the Hung Mongol Sutra, but my father. He spent his entire life studying how to cultivate this scripture, but unfortunately the congenital limitations made him regret it for the rest of his life. ”

The innate restriction mentioned by Emperor Ao is estimated to be that the Hongmeng Sutra is only suitable for human cultivation.

"According to what my father said, if you want to cultivate the Hongmeng Sutra, you must change your bones, otherwise you won't be able to withstand the impact of Hongmeng Purple Qi. ”

"But I've been in the Immortal Cultivation Continent for three thousand years, and I've never heard of the method of bone replacement?" Chu Xun said.

"Not 3,000 years, but 30 million years, there has never been a change of bones. Emperor Ao looked at Chu Xun and said seriously.

Chu Xun felt a chill in his back, this was a big gamble, and the bet was his life.

"You can choose to give up, after all, no one knows if this road will work. Emperor Ao said quietly.

Chu Xun glanced at him, his grip was loosened, and it was difficult to make up his mind.

Life is at stake, and you can't be careless.

But only for a moment.

"I want to cultivate. Chu Xun said, with a firmness in his tone that only he could understand.

Emperor Ao looked at him and said, "Are you sure?"

The corners of Chu Xun's mouth raised slightly, he stood up, looked at the ancestral dragon bone, and said, "Do I still have a choice?" Since the Firmament Chain is possessed, I have no way out. ”

"Nine deaths. Emperor Ao said in a deep voice.

Chu Xun chuckled, "Don't you have a lifetime?" I've always had good luck. The method of bone replacement will start from me. ”

"I'm going to take a path that no one has ever walked before. Chu Xun held his head high.

The tension in Emperor Ao's eyes dissipated a little, and his face was a little strange, both worried and urgent.

"You also want me to choose to change bones, right?" Chu Xun suddenly looked at Emperor Ao.

Emperor Ao's eyes dodged slightly, and he said in a deep voice: "I admit it, but I hope you succeed." If I could, I would like to be the one who took the risk. ”

Chu Xun glanced at him and said playfully: "Think beautifully, how can I give you such a good opportunity." When I return, I will drink with you three jars. ”

"Okay!" Emperor Ao nodded heavily, "I'll wait for you." ”

At the same time, Emperor Ao handed the spar to Chu Xun.

Chu Xun took the spar and turned around and walked towards the ancestral keel.

Emperor Ao watched him walk under the ancestral dragon bone and seal the area.

……

……

Chu Xun raised his head and looked at the golden ancestral dragon bone above his head, and his heart throbbed.

The size of the ancestral dragon bone was much smaller than that of Emperor Ao, but it was also several zhang long, which made Chu Xun dizzy.

Chu Xun sat down and fell into deep thought.

No one has ever tried to change bones, and there is no way to change bones, and there is no experience to learn from.

Chu Xun is walking a road that no one has ever walked for a day, a road where life and death are uncertain.

In this way, Chu Xun sat for two days, and he listed various methods in his mind, but in the end he found that they were useless.

Could it be that you have to pull out your own bones and replace them with those of the ancestral dragon?

Chu Xun was taken aback by his crazy idea, he had heard of peeling skin and cramps, but he had never heard of peeling skin and pulling bones.

Another two days passed, and Chu Xun didn't find the slightest solution.

"Old dragon...... How did you come up with this bad idea?" Chu Xun looked up at the ancestral dragon bone, wanting to cry without tears, because the grotesque idea of changing bones was what this uncle came up with.

Until the fifth day, Chu Xun had listed tens of thousands of methods, but none of them could be used.

Now there is only one way, and that is to draw out your own bones and replace them with ancestral dragon bones.

Chu Xun gritted his teeth, and his eyes became extremely firm.

He has no way out, either desperately fight to find a way out, or be suppressed and eroded by the chain of the sky, become a waste, and then wait for death.

Chu Xun's eyes were clear, and at a certain moment, he was still dazzling by the golden light emitted by the ancestral dragon bone.

He is not willing to fall, he wants to rise in silence and fight to the death.

Since he decided to take the risk, Chu Xun didn't think much about it anymore and began to set up the magic circle.

After a few moments, everything was ready.

"Offended. Chu Xun bowed, then soared into the air and landed directly in the ancestral dragon skeleton.

Because it was the first time, Chu Xun wanted to start with his left hand first. Because he cultivated the Blue Dragon Overlord Body Technique and bathed in dragon blood, the ancestral dragon bone did not reject him.

Chu Xun picked up the ancestral dragon's left front paw and jumped down from mid-air.

The ancestral dragon claw is about the size of a square table, like a secret gold, the golden light flows, the coercion is terrifying, and it weighs 10,000 catties.

Chu Xun held the ancestral dragon claw and threw himself directly into a sitting magic circle.

"[Nine Heavens Incineration Array], refine it for me!"

Chu Xun sealed his hands and pointed out in the air, activating hundreds of fire dragons to rise into the sky, and then swooped down and began to incinerate the ancestral dragon claws.

Unfortunately, after a few hours, the ancestral keel did not react at all.

Chu Xun was tired and sweating profusely, and the consumption of true yuan was too great.

I had no choice but to withdraw the circle.

Chu Xun rubbed the ancestral dragon claw the size of a square table, he had a little headache, he originally wanted to use the Nine Heavens Incineration Array to refine the small one, but now it seems that it will not work at all. You can't just change it like this, then even if the bone change is successful, he won't go out in the future.

It would be nice if it was a little smaller, Chu Xun thought to himself, but as a result, the ancestral dragon claw suddenly became smaller, only half the size just now.

Chu Xun's eyes straightened, and his heart was beating wildly, wouldn't it? Could it be that the ancestral dragon bone still has the ability to change automatically?

He put his hand on the ancestral dragon's claw again, and silently thought in his heart, becoming smaller.

Swish!

The ancestral dragon claw was really half smaller.

"Small, small......"

As Chu Xun meditated in his heart, the ancestral dragon claw became as big as a person's palm.

"Get bigger, big ......" Chu Xun thought silently in his heart, but unfortunately this time the ancestral dragon claw did not react in the slightest.

The relationship can only shrink, but it can't become bigger, Chu Xun couldn't help but be a little disappointed.

The dragon claw only had four fingers, and Chu Xun took off the claw on the ancestral dragon's abdomen in the air.

The ancestral dragon is a five-clawed golden dragon, and the five claws are just twenty fingers, which correspond to people.

Chu Xun entered the magic circle that had been arranged a long time ago.

Everything is ready to go.

Chu Xun's face was rare and serious, this is a road that no one has walked, how dangerous the road ahead is unpredictable, whether it will be destroyed or re-emerged, everything is unknown.

Burst!

Blood splattered, and the skin of Chu Xun's five fingers opened open, leaking out the white bones and blood-red tendons inside.

Sweat the size of a bean oozed from Chu Xun's forehead, bloodshot eyes spread, painful pupils dilated, and the whole person was trembling violently.

He cut the flesh of the five fingers of his left hand, and the five fingers connected to the heart, and this pain invaded the bone marrow.

The next step is to take the bones and extract the bones of your five fingers.

Chu Xun's right hand was trembling, but his eyes were extremely firm, peeling off the flesh of his left hand, pinching his thumb bone and pulling it out.

"Ah......h

Chu Xun let out a low roar in his throat, a handsome face was distorted in pain, his forehead, temples, neck, and green tendons burst out, and the whole person was soaked with sweat as if he had been fished out of the water.

Laugh at!

"Ah......h

His thumb bone was pulled out raw by himself.