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Immortal energy has the ability to change both inside and outside the body, and as long as the opportunity is enough, the body can be allowed to evolve once.

A cultivator is an immortal and immortal body in the process of evolution again and again, and an epiphany, a breakthrough, or a calamity will contribute to the qualitative change of the body.

However, now Fang Yun's transformation of the night old dantian with immortal qi is artificial, if it weren't for his very understanding of the human body, and his control of energy has reached the peak realm, Fang Yun would not dare to act so rashly.

Although Ye Lao closed his eyes and looked inwardly at every change in his body, the muscles on his face were completely relaxed, and his mouth was slightly open, as if he was extremely surprised.

Because he felt the change, the subtlety of this change, he couldn't believe it, he didn't dare to accept it, he couldn't imagine it.

His dantian was expanding at a speed visible to the naked eye, and the energy rushing into the dantian did not show a trace of rejection, there was only one situation, that is, he had successfully broken through.

He believed that Fang Yun could do it, but what made him unclear was that the expansion of the dantian had not stopped, and it seemed to be still expanding.

Fang Yun had never had the habit of giving up halfway, since he did it himself, he would naturally do his best to be perfect.

The evolution of the body, this is very mysterious, and the first evolution, the ascension is very large, before this, the night old has not changed, or has no ability to change.

That's why Fang Yun was able to transform the night-old dantian so easily, the dantian had more than doubled, and Fang Yun stopped expanding.

If it is like continuing to expand, it is not impossible, but it is not completely beneficial to the night old, if the fighting energy in the dantian is not enough, the night old will need a huge amount of energy to fill, if it cannot be filled in a short time, the dantian will make a contraction.

However, Fang Yun's transformation did not stop, the next step was to make the dantian's throughput stronger, so that the absorption and release of the fighting qi of the night old man would be greatly improved.

The function of the dantian is very similar to the heart, one is to exhale energy, the other is to circulate blood, the greater the power of the heart, the greater the strength that can be naturally used, and the same is true for dantian.

A pang of hunger hit his heart, and the old man gasped for breath, and the hunger pang was almost unbearable for him.

For the first time in decades, he felt that such hunger was unbearable, which was a slight side effect of the breakthrough of Douqi.

Fang Yun felt that the air flow around him had changed slightly, and his transformation of the dantian was also nearing the end, and finally dispersed the immortal qi, and his body quickly retreated.

Whether it is cultivating the truth or cultivating the fighting qi, after breaking through, it will require an extremely large amount of energy to fill the expanded dantian.

Just now, it was actively absorbing energy and pouring it into the body, but at this moment it is automatic, and the dantian is frantically absorbing energy and filling the empty dantian.

As the dantian continued to devour the aura, the air in the small courtyard became more and more urgent, and a large amount of energy began to be absorbed by Ye Lao.

There was no huge momentum, there was only a strong wind, Fang Yun retreated again and again, looking at the night old man in the center, although the dantian was frantically absorbing the surrounding aura, but this was a normal performance.

Fang Yun let out a long sigh of relief, in order to guide and transform the night old dantian just now, the immortal qi he consumed was not small, and this time I am afraid that he will have to rest for more than half a month.

Ye Lao felt that the middle of this dantian seemed to be dissatisfied, no matter how he absorbed it, he always felt that the middle of the dantian was empty.

The night passed quickly, Fang Yun fell asleep, and Ye Lao was still sitting in the Na Yuan array, but when Fang Yun stepped out of the door, Ye Lao immediately opened his eyes.

Ye Lao didn't look like he had changed much, and on his old cheeks, a pair of eyes were a little sharper than before, and his breathing was much heavier.

If Fang Yun didn't look closely, he wouldn't be able to see the change in Ye Lao, Fang Yun stepped forward with a smile: "Ye Lao, how do you feel?"

Ye Lao smiled bitterly, as if he was very helpless: "Yun Shao, how did you do it?"

"What?" Fang Yun tilted his head and looked at Ye Lao in confusion.

"I'm not a seventh-order second-rank now, I'm a seventh-order fourth-rank ......" Ye Lao couldn't believe it, and after confirming it again and again, he dared to accept it, and he was promoted to the third rank overnight, which almost saved him twenty years of cultivation time.

Even at this moment, his dantian was still not completely filled, after all, after the spiritual energy was absorbed into his body, it had to be refined and fused into Dou Qi before it could be turned into his own use.

Fang Yun touched his nose, he didn't expect that on a whim, he didn't listen to it, and he actually directly helped Ye Lao improve the third grade, but on the other hand, he himself was tired and half dead, and he couldn't do it to such an extent if he was another person.

To be able to improve the three grades for Ye Lao, the first point is to be extremely familiar with Ye Lao's body, almost equivalent to Fang Yun's own body, this is ten years of research, in order to be so familiar, plus Ye Lao is just at the bottleneck of his fighting spirit, it is the moment of dantian's growth.

"Now you still use the energy crystal to replenish the fighting qi in your dantian, otherwise the dantian will shrink, and the level of dou qi will also fall. Fang Yun said.

"Dantian contraction?" Ye Lao asked puzzledly, although he had cultivated his fighting spirit all his life, he still didn't understand the technical terms in the other party's mouth.

"You don't understand, anyway, use energy crystals to replenish your fighting qi first. Fang Yun didn't explain too much, after all, this kind of professional terminology involved a very complex system, Fang Yun was not interested in explaining so much.

Ye Lao nodded, in the past two years of in-depth contact with Fang Yun, he has become more and more aware that his knowledge is shallow.

It's hard to imagine how much stuff is in this little head.

Fang Yun finally checked Ye Lao's body and dantian, and after confirming that he was fine, he let Ye Lao go back.

In fact, Fang Yun would rarely directly improve his cultivation for others, after all, the results caused by suddenly improving his cultivation might not all be good, just like Ye Lao, just to adapt to the current fighting spirit, it would take him a year or two to compete with opponents of the same level.

And the more you improve, the future growth will not necessarily be accelerated, often because there is no sense of urgency, so that the fighting spirit loses growth, and what is too easy to get may not be as perfect as imagined.

Although this time it is said that the night old man broke through the level of fighting spirit, but the night old fighting spirit, there is no substantial leap, although it has been promoted from the seventh order to the fourth grade, this span is very large, but it is not a cross-level, so the fighting spirit itself has not changed qualitatively.