Ao Ling Tian and Shi Ranshi returned to the inn, and also returned to their own guest rooms, Ao Ling Tian found that there were also many strong people in this Qingshan City at this time, and he also knew how weak his strength was.

"Teacher, how can I use this demon core to enhance the fire of qi refining?" Ao Ling Tian took out the fire attribute demon core he had just bought.

"Use the Fire Refining Technique to run the Qi Refining Fire first!" the Phantom Elder flew out of the ring, and at the same time isolated the room with the power of Dou Qi.

However, Ao Ling Tian also immediately pinched the seal with both hands, and the fire refining technique was operational, and a hot breath suddenly ignited in his body.

This hot breath covered the entire room, but fortunately, the Phantom Elder had already used his fighting strength to isolate this room, otherwise he would have made the people outside feel this hot breath as well.

"Bear!"

In the palms of Ao Ling Tian's hands, black qi refining fire suddenly emerged, and the temperature of the entire room suddenly increased a lot.

As soon as the Fire Refining Technique was put into operation, Ao Ling Tian felt that the Dou Qi in his body really slowly flowed into the Fire Refining Space, and then it was refined into the Qi Refining Fire.

But he knew that if he wanted to use his Dou Qi to improve this Qi Refining Fire, he was afraid that it was impossible at the moment, and he felt that even if he used up his whole body Dou Qi, he might not be able to raise a little Qi Refining Fire, and this Qi Refining Fire Space felt like a bottomless pit.

"It's up to me next. ”

As soon as the phantom old finger moved, the fifth-order demon core suddenly automatically flew into the air in front of him.

"Click!"

The magic core stopped in the air in front of the phantom old man, and the phantom old man quickly recited some seal on his mouth, and the magic core suddenly cracked with a click.

"Bear!"

When the demon core cracked, the fire of refining qi suddenly appeared in the phantom elder's hand, burning the demon core, and Ao Lingtian's eyes kept watching everything the phantom old man did.

"Prepare to use the fire refining technique to absorb the flames of this demon core!" As soon as the phantom old words fell, the qi refining fire in his hand suddenly increased, burning this fifth-order demon core.

"I understand, teacher!" Ao Lingtian nodded and replied with a serious face.

"Click!"

A burst of sound came from this magic core, and I saw that there seemed to be a powerful flame hidden in this magic core.

"Bang!"

"Bear!"

A thud sounded, and this fifth-order demon core suddenly burst open, and a hot flame suddenly burst out.

"Absorb this flame immediately!" "Phantom Elder flew the flame control of this demon core in front of Ao Lingtian with one hand.

"Bear!"

However, when Ao Ling Tian saw this, he immediately surged out his Qi Refining Fire to the extreme, fusing the flames of this demon core together.

"Whew!"

A drop of sweat fell on the ground, but it was evaporated in an instant, which shows how terrible the temperature of this room is at this time.

In the middle of the night, Ao Ling Tian's own Qi Refining Fire and the flame of this demon core were completely fused, and he quickly pinched the seal of the Fire Refining Technique in both hands.

A powerful flame was in front of him, but at this time, it was absorbed into his body by wisps.

"It's so hot, the muscles and bones in the body are as uncomfortable as being burned by fire!"

Ao Lingtian's eyes were closed, but the corners of his eyes and mouth kept twitching, and he felt that the internal organs, meridians, muscles and bones in his body were as hot and uncomfortable as if they were being burned by fire at this time.

"Ling Tian, hold on, if you can absorb this fifth-order demon core flame, your Qi Refining Fire will definitely be able to be upgraded to a second-level Qi Refining Fire. "How could the Phantom Elder not see Ao Lingtian's painful and uncomfortable appearance, but he also knew that if the flame of this demon core was completely absorbed, his Qi Refining Fire would definitely be raised to the second level.

Ao Ling Tian absorbed this flame fused with the demon core into the space of the Qi Refining Fire in his body, but the space of this Qi Refining Fire was simply like the Great Stomach King.

"Sneer......"

The sweat on his forehead kept dripping, but the sweat hadn't even dripped to the ground, but it was evaporated by the incomparably hot heat in the air.

Seeing this, the phantom old man frowned, and he immediately surged out a fighting spirit to block the hot breath.

In Ao Lingtian's state at this time, he couldn't help at all, and he could only let no one disturb him to absorb this flame.

After a moment, Ao Lingtian felt that his body was very hot at this time, and the meridians, muscles, bones, and internal organs in his body were extremely painful and uncomfortable.

And the corner of his mouth was soaked with blood, he knew his state at this time, but he couldn't give up now, if he gave up, then everything he had done before would be in vain!

"Fortunately, this kid has cultivated to that Heavenly Crossing Technique, otherwise he would definitely not be able to withstand such an absorption flame!" Seeing that Ao Ling Tian had already absorbed half of the flame of this demon core at this time, the Phantom Elder also knew that Ao Ling Tian would definitely be able to absorb it completely.

Time passed little by little, and night came, and a bright moon hung on the edge of the sky, and the moonlight poured down, illuminating the earth extremely bright.

However, the flame fused with the demon core in front of Ao Ling Tian was no longer visible at this time, completely allowing Ao Ling Tian to absorb the Qi Refining Fire Space in his body.

But Ao Ling Tian was still running the fire refining technique at this time, and he wanted to refine the flame of this demon core into his own qi refining fire.

Although he had absorbed the flames of the demon core, the temperature of his body had not dropped, and it was still extremely hot, and after two or three hours, he unconsciously began to adapt to such a hot temperature.

"Bear!"

A black Qi Refining Fire suddenly surged out from Ao Ling Tian's palm, but his Qi Refining Fire was much stronger than before.

"That's good!" Seeing this, the phantom old man smiled and praised with a look of satisfaction on his face.

"Whew!"

Ao Lingtian put away the Qi Refining Fire, and immediately exhaled a breath of white qi, and the whole person immediately felt a lot more comfortable.

The high temperature of the body has also dropped a lot, and the muscles, bones, meridians, and internal organs in the body are also immediately activated by the breath technique, and the whole body is roamed through the whole body like a baptism with fighting qi.

"Teacher, does my current Qi Refining Fire belong to the second level?" asked Ao Lingtian.

"Yes, now it's not a problem for you to refine the four-grade pill, the problem is that you have to control the temperature and alchemy. Phantom Elder said softly.

"Well, it turns out that absorbing the flames of the demon core is so difficult!" Ao Lingtian nodded, and only then did he realize that there was a smear of blood hanging from the corner of his mouth.

"If you hadn't cultivated the Heavenly Technique given by that strong man, the teacher wouldn't have dared to let you raise the Qi Refining Fire right now. "Phantom old way.

"I see, no wonder I was able to withstand such a high temperature!" Ao Lingtian heard this, and he was glad that his body was strong enough, otherwise he might have been seriously injured by the burning just now.

"The Heavenly Technique given by that white-haired old man is definitely not an ordinary physical technique!" said the Phantom Elder in a condensed voice.

"This kind of physical technique is really strong!" Ao Lingtian clenched his fists, feeling full of strength.