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Fang Yun stared at the old man with big eyes, the old man smiled and asked curiously.

"What agreement?"

"I'll help you heal your old problems, can you do research for me?" Fang Yun said seriously.

"Research?" The old man couldn't help but show a stunned expression, this little baby actually knows how to research, and his own body is crippled, how can he treat it well.

Fang Yun didn't have a deep understanding of Dou Qi, so he hoped to use the old man's body to further study Dou Qi.

Although the old man didn't believe that Fang Yun could really heal his body, he couldn't refuse such an innocent child, and finally nodded lightly.

Fang Yun grinned more happily, and treated the old man more seriously, with the old man's current physical condition, in less than two years, I am afraid he will not be able to hold on.

And as time goes by, the cold qi will become stronger, and when the time comes, it will inevitably dominate and directly control the fighting spirit of the old man, which means that the fighting spirit attribute of the old man will directly transform into a negative.

And the most direct result is that the old man simply cannot bear the great pain caused by the transformation, and the old man will endure the most painful moment in 50 years.

Even if he survived and his attributes completely turned into negative, he would not control the negative fighting spirit, and the result would still be that the fighting spirit was out of control and went mad.

This is the so-called one mountain can not accommodate two tigers, two fighting spirits with different attributes, can only fight to the death.

Fang Yun used the immortal qi to gently twist a little bit of cold qi, the cold qi was like a maggot attached to the bone, it immediately stuck to the immortal qi, and as Fang Yun withdrew the immortal qi, it returned to Fang Yun's body.

The corners of Fang Yun's mouth were slightly hooked, this trace of cold aura was fun, extremely stubborn, Fang Yun wanted to refine it, but it had no effect.

This reminded Fang Yun of a treasure book in the martial arts, "Nine Yin True Scripture", the Nine Yin internal strength was like this trace of cold qi, but it was even more cold and domineering, compared to some cultivation techniques, it was not bad.

Fang Yun didn't immediately dispel the cold aura, but left it in his body and continued to observe its changes.

Only by experiencing it can we understand the changes most deeply and judge the best treatment.

That trace of cold qi was really poisonous, and it was only a moment after entering Fang Yun's body, Fang Yun immediately felt a piercing pain in his heart.

Fang Yun did not suppress it with immortal qi, but allowed this cold qi to continue to exist, continuing to stimulate his body and fight with immortal qi.

A cold sweat was already breaking out on Fang Yun's forehead, and the pain of this heart-piercing was indescribable, as if there were ten thousand sharp blades piercing his heart all the time.

Fang Yun's gaze swept over the old man, it was unimaginable that the old man had actually endured such severe pain for fifty years.

Moreover, the immortal qi has a great suppressive effect on this kind of cold qi, so Fang Yun's pain has almost alleviated the ten**, and the fighting qi on the old man's body does not have an overwhelming ability, so this kind of pain is far stronger than Fang Yun.

Although Fang Yun did not directly suppress the cold qi, with the "Treasure of the Heavens" he cultivated, his immortal qi was so domineering, this cold qi was like a dragon and maggots in front of the immortal qi in his body, as long as Fang Yun's heart moved, he could instantly turn this cold qi into nothing.

However, this was not what Fang Yun wanted, Fang Yun instead allowed the erosion of the cold qi, he had to clearly know the characteristics of this cold qi before he could prescribe the right medicine.

As the cold qi continued to entrench, there was actually a faint attitude that took root in Fang Yun's body, Fang Yun was stunned for a moment, but he was a little surprised by the behavior of this cold qi.

This cold qi was really a scoundrel, and when he found that he couldn't fight against the immortal qi, he actually took the initiative to retreat, and Fang Yun's immortal qi didn't pursue it anymore, and the cold qi took root on its own, growing in Fang Yun's body.

It's just that Fang Yun's body is different from the old man, the old man can't do anything about this cold aura at all, but Fang Yun's body will not give him a chance to reproduce and grow.

However, Fang Yun was fed with immortal qi again, just like raising a pet, it could also be said that Fang Yun was playing with fire, if he was not careful, let the cold qi back, it would not be so fun.

However, Fang Yun liked such a risky behavior, for the cold qi, the immortal qi in Fang Yun's body was too domineering, it couldn't be eroded at all, but Fang Yun fed the immortal qi.

The cold qi immediately swallowed and wrapped a trace of immortal qi, but the immortal qi was not so easy to swallow, not to mention that the cold qi was too weak, Fang Yun's trace of immortal qi merged into the cold qi, but let the immortal qi dominate.

The cold qi began to undergo a qualitative change, as if two completely different energies were interacting with each other and merging with each other.

This was something Fang Yun hadn't expected, originally he wanted to strengthen the Yin and Cold Qi, but he changed the nature of the Yin and Cold Qi, making the fusion of the two change qualitatively.

"Extreme Spirit Cold Qi?" Fang Yun raised his eyebrows, but found that after the fusion of the immortal qi and the cold qi, it actually transformed into the extreme spirit cold qi.

Fang Yun had never seen it either, but he had only seen relevant records in ancient books, the so-called Extreme Spirit Cold Qi was the extreme cold qi that could only be produced by the cold region for hundreds of millions of years.

For some cultivators who are biased towards the negative, the Extreme Spirit Cold Qi is extremely precious, and the magic weapon for refining the ice attribute, the Extreme Spirit Cold Qi, is an excellent heavenly and earthly treasure.

Fang Yun didn't expect that his unintentional move would actually artificially create an extremely cold qi, which made him feel very surprised.

However, this bit of extreme spiritual coldness, whether it is cultivation or refining magic weapons, is useless.

Fang Yun's gaze fell on the old man, the old man was still staring at Fang Yun, looking at Fang Yun's serious demeanor, he felt more and more cute Fang Yun.

There is a lot of cold qi in the old man's body, if he can take it all for his own use, and then cultivate and breed it, it is enough to refine an ice magic weapon.

However, with the physical condition of the old man, if he forcibly absorbs a large amount of cold qi, I am afraid that the old man's body will also collapse.

After all, the cold qi is now a part of the old man's fighting spirit, although this part of the cold qi is not good for the old man, but over the years, it has been deeply rooted in the old man's body, if you rashly do it, it will only aggravate the deterioration of the old man's body.

Fang Yun looked at the old man in embarrassment, and the old man smiled slightly: "What's the matter?"

Fang Yun was stunned, he was just thinking about the cold qi just now, but he ignored the most important thing, the old man's condition.

Fang Yun was annoyed for a while, he had made the same mistake as he had done in his previous life, and when he saw good things, he forgot them.

A gentleman loves money and takes it in a good way, Fang Yun also has his own principles, when seeing a doctor, patients have absolute priority, of course, every time Fang Yun treats mortals or cultivates truth, he will never look in vain, this is also his principle.