After Lin Yu returned to the Black River Sect, he took Cheng Xing'er to the forbidden land as soon as possible.

As soon as he walked into the magma river, the Polar Star Grass in the Qiankun bag reacted.

"Huh?"

Lin Yu stared at the Polar Star Grass and found that the Polar Star Grass was constantly agitating at the moment.

"What's going on?"

"Because it senses my presence."

The red light flashed, and the fire phoenix appeared in front of Lin Yu.

Her expression was quite pleasant at the moment.

"You really brought back the Polar Star Grass."

"Of course."

Lin Yu smiled slightly.

"Since the junior said it, he will definitely bring back the Pole Star Grass."

After saying that, he took out the Polar Star Grass and handed it to the Fire Phoenix.

He knew that the Pole Star Grass was meant to be used by Cheng Xing'er, but how to use it had to be done by the senior of Huofeng.

Seeing that Lin Yu was so good to Cheng Xing'er, Huo Feng's heart was full of gratitude.

But she also knew that Lin Yu would not accept her reward easily.

"Is there nothing that can be done?"

At this moment, Huo Feng had an idea and suddenly thought of a way.

So she pretended to be serious and said, "Actually, although this Extreme Star Grass can help Lin Gongzi strengthen your divine sense, there is still one more condition to do so." ”

"Conditions?"

Lin Yu's brows furrowed together.

How can there be conditions for this Polar Star Grass to be retrieved?

If you have the conditions, say it early.

But he still calmly asked: "What are the conditions for daring to ask?" ”

Huo Feng said righteously: "If the Lord of the Contract wants to achieve the same effect, he must learn the secret art of my clan. ”

"Mystic?"

Lin Yu was stunned for a moment.

I'm afraid that's the only secret technique that Huo Feng said, right?

He sighed and said, "Isn't what the predecessor said about the Nirvana technique?" ”

"That's right."

Seeing that Lin Yu had taken the bait, Huo Feng continued to say: "If the Lord of the Contract does not know the technique of Nirvana, not only will he not be able to obtain the effect of the Polar Star Grass, but even the Contract Spirit Beast will be at risk when absorbing the Polar Star Grass. ”

Seeing that she was talking about the matter so seriously, Lin Yu couldn't help but have doubts.

If it's really that serious, why is it being said until now?

After pondering for a moment, Lin Yu smiled in his heart.

He knows very well what kind of person Huofeng is, and he will never fail to explain it in advance.

She only said it now, and I am afraid that there is only one purpose.

She wanted to pass on the art of nirvana to herself, but she was afraid that she would refuse, so she told such a white lie.

"I didn't expect Huofeng to have such a clumsy side, how could I refuse the opportunity to learn the art of Nirvana?" Lin Yu said secretly in his heart.

Now that he knew Huo Feng's thoughts, Lin Yu naturally had no intention of breaking it.

"Then without further ado, I also ask my seniors to teach me the art of Nirvana."

"Good!"

Huo Feng's face was overjoyed, and he immediately came to Lin Yu's side.

"You take it easy, I'll pass the art of Nirvana into your consciousness now."

"Yes."

Lin Yu immediately closed his eyes.

I saw that Huo Feng lightly pointed his finger on Lin Yu's eyebrows.

A huge amount of information instantly entered Lin Yu's divine sense.

This kind of intense pain is difficult for Lin Yu to get used to until now.

But he was able to endure it.

"Alright."

Huo Feng took a step back in satisfaction.

"How?"

Lin Yu slowly opened his eyes, a look of shock on his face.

He hadn't used the technique of Nirvana before, and he didn't know the mystery of it.

Now that I know it, I am even more surprised.

This Nirvana technique can not only allow the user to obtain a near-immortal trait, but can even explode at a difficult moment, causing the user's cultivation to increase for a short time.

"If I use it now, my cultivation can be instantly promoted to the peak of the Yuan Infant Realm!"

Lin Yu couldn't help but feel his heart beat faster.

Now his strength when he first entered the Jindan realm was already so good.

If it reached the peak of the Yuan Infant Realm, how terrifying it would be.

It's a pity that the side effects of this trick are huge.

Not only will it cause great damage to the body, but it may even shorten the life of the user depending on the situation.

"It seems that it is better not to use this trick at a critical moment." Lin Yu said secretly in his heart.

"Fortunately, there is Huanyu Ding, even if there is loss, I can let Xiaohuan help me repair it, which shortens the life...... Maybe we'll have to wait to see if we can improve it later. ”

Thinking of this, Lin Yu was full of joy, but he still bowed calmly to the fire phoenix.

"Thank you for your advice."

"No, no."

Huofeng also pretended to be reluctant.

"There's no way around it, and I don't want to hand over my clan secretary to you."

"Ahh

Until now, Huo Feng is still pretending, so Lin Yu has no choice but to continue to accompany her.

"The younger generation will definitely find an opportunity to repay the kindness of the seniors in the future."

As soon as Huo Feng heard this, what else did he do?

Originally, she taught Lin Yu just to repay Lin Yu, but now it's good, but it makes the family owe favors.

"Actually...... It doesn't have to be ......."

Seeing that she was about to refuse, Lin Yu immediately interrupted her.

"This nirvana technique still needs to be cultivated, and the juniors see that they must be in the land of extreme fire to cultivate, I wonder if the seniors can let the juniors stay in the magma river for a while?"

"Uh, well, of course."

Of course Huo Feng knew this, and she had planned to do so from the beginning.

"Then Xing'er."

Lin Yu set his eyes on Cheng Xing'er.

"Can you follow your mother first? My brother is going to practice. ”

"Good!"

Cheng Xing'er didn't say a word, and ran directly behind Huofeng.

But she was still reluctant to say, "Brother Lin, you have to come back quickly after cultivating." ”

"Well, I won't keep you waiting too long."

After speaking, Lin Yu looked at the center of the magma river and jumped for life.

Now that his physique has risen, coupled with the repair of Huanyu Ding, Lin Yu is not afraid of the harsh environment of the Magma River at all.

Rather, this place is an excellent place for him to cultivate.

"So, let's get started."

Lin Yu secretly said in his heart: "Xiaohuan, pay attention to help me replenish my spiritual power." ”

"Okay."

Immediately, Lin Yu closed his eyes and began to cultivate the art of Nirvana.

As soon as he sat cross-legged and exercised his spiritual power, a scorching fire gradually appeared in his body.

But Lin Yu only felt that this fire was very warm and kind.

This cultivation directly took Lin Yu nearly a week.

During this period, Su Keer also came to visit Lin Yu.

It's just that she found that Lin Yu was concentrating on cultivation, so she didn't bother Lin Yu and left.

At the final stage of cultivation, Lin Yu could even see a small phoenix in his body.

"This means that the art of nirvana is about to be cultivated."

……

"Whew."

On this day, Lin Yu opened his eyes and wiped the sweat off his face.

"I didn't expect it to take me so long, so I can't delay it any longer."

As soon as he finished his cultivation, Huo Feng immediately noticed the change, and soon flew to Lin Yu's side.

"Congratulations."

Huo Feng looked at Lin Yu with great satisfaction.