Although there was a slight guess in his heart, after thinking about it, in the end, Guiguzi still chose to wait and see the changes and did not make a sound.

And although as the medicinal materials became rarer and rarer, the temperature of the flame refining them became higher and higher, and the lines on the inner wall of the Black Emperor Ding became clearer and clearer, and the duration became longer and longer.

But because all his mind was condensed on the medicinal materials, until now, Han Chen still hadn't made the slightest discovery.

Time is like a small stream, gurgling and flowing, and in the blink of an eye, three days have passed.

In the past three days, Han Chen did not stop in the slightest, except for eating, all the time was spent on the practice of refining the essence of medicinal power of medicinal herbs.

If the soul power is exhausted, sit down and recover, and after the soul power is restored, continue to devote itself to the crazy refining.

In three days, Han Chen had refined more than 8,000 of the nearly 10,000 medicinal herbs, and the practice of more than 8,000 medicinal herbs made Han Chen feel tired, but the result was very gratifying.

Call!

Opening his mouth and exhaling a long breath, Han Chen, who was sitting cross-legged with his eyes closed, slowly opened his eyes, a fine light flashed in his eyes, and then disappeared, but his dark eyes were clearer than three days ago.

However, if you look closely, you will find that this clarity is only an illusion, and under the clarity, there is an endless depth, like the starry sky, and there is no edge in sight.

Rubbing his temples lightly, although his soul power had fully recovered, the tiredness caused by the continuous refining for three days had not recovered because of this.

Eyes swept around, at this time. There are nearly 10,000 medicinal herbs on the ground of the cave, and there are only about 1,000 left, and the quality of these 1,000 medicinal herbs is quite good, which is a rare thing.

"After these three days of crazy practice, at this time, I have been able to skillfully refine the essence of medicinal power in the second time with only one attempt at unfamiliar medicinal materials!" Han Chen pondered secretly, and said in his heart: "Compared to three days ago, there has been great progress. However, it is not the slightest attempt to achieve it. Directly refining the essence of medicinal power at one time, there is still a little short!"

"I hope I can achieve my goal!" said secretly as his gaze swept over the nearly a thousand medicinal herbs on the ground again.

After that, Han Chen didn't think about anything else. The right palm is directly extended. Press on the black flame of the Black Emperor Ding. With a movement of his mind, pale cyan flames quickly circulated from the skin of his palm, passing through the fire mouth. Poured into the ding.

With a 'bang', the pale cyan flame rose rapidly, and the temperature in the Black Emperor Ding also increased rapidly.

Immediately after, Han Chen's gaze swept around, and he quickly selected a medicinal herb.

Five-colored fruit. It is only the size of a fingernail, and there are five colors flowing on the surface, which looks very gorgeous, and you can smell a faint fragrance when you step forward.

This five-colored fruit is one of the medicinal materials needed for the Sanpin Pill Gain Pill, and it is also a relatively rare medicinal material.

With a light wave of his left hand, the five-colored fruit soared into the air, falling into the Black Emperor Ding, and then quickly wrapped in pale cyan flames.

This five-colored fruit Han Chen tried it for the first time, if it was another alchemist, he would definitely be extremely careful about this unfamiliar medicinal material that he had never come into contact with, and the temperature of the flame increase was also slowly rising, so that he could more accurately find the best hot spot for the medicinal material.

But Han Chen was not like this, the five-colored fruit, he had indeed never refined it, but he did not hesitate at all, his mind moved, and the temperature of the flame skyrocketed, and with an extremely fierce attitude, it quickly rose.

At the same time as the flames skyrocketed, Han Chen's soul power was also split into two, and one side was attached to the five-colored fruit, closely following all the changes. On the other side is always ready to control the flames to stop.

Soon, when the temperature of the flame reached a certain level, Han Chen quickly controlled the temperature of the flame's increase, reducing the speed of the increase.

The mind is more condensed, and the soul power is surging, carefully looking for the best hot spot of the five-color fruit.

The temperature of the flame was much lower than before, but it was still very fast.

"It's not here, you can continue to improve!"

"You can still improve!"

"It's just a little bit close!"

Under Han Chen's close perception, the temperature of the flame climbed upwards at an unhurried speed.

At this moment, Han Chen didn't notice that on the inner wall of the Black Emperor Ding, vague lines and traces slowly emerged, and at the same time, as the temperature of the flame slowly increased, it gradually became clear.

All the changes in the Black Emperor Ding were clearly captured by Guiguzi, and at the moment when those line traces appeared, Guiguzi instantly noticed it.

"Sure enough, as the temperature of the flame increases, it becomes clearer and clearer!" his eyes narrowed slightly, and Guiguzi said secretly.

"No, the temperature is high!" Han Chen, who was looking for the five-colored fruit, suddenly changed his complexion.

By the time he tried to cool it down, it was too late. Just heard a 'click', and a crack quickly appeared on the skin of the five-colored fruit, which was only the size of a fingernail.

Then the crack expanded rapidly, and when Han Chen lowered the temperature, the five-colored fruit had already split in half, and then directly withered and cracked, shattering.

Sensing the situation in Ding, Han Chen was also helpless. The size of the five-color fruit is too small, and it is also extremely sensitive to temperature, once the temperature is too high, it will be directly destroyed, and there is no room for negotiation at all.

"Alas" sighed lightly, Han Chen had long been used to such failures.

However, Han Chen was not hit, let alone discouraged, because there were countless failures, how could there be that success!

As soon as his mind moved, Han Chen quickly raised the temperature of the pale cyan flame, completely refining the residue of the five-colored fruit.

And at this moment, as the temperature skyrocketed, those blurred lines on the inner wall of the Black Emperor Ding became clear at a speed visible to the naked eye, and as these lines became clearer and clearer, they actually emitted a faint light.

Although Han Chen's soul power was all concentrated in the flames, the space inside the Black Emperor Ding was not large, and the moment the light appeared, it attracted Han Chen's attention.

And it was only at this time that Han Chen finally discovered these traces of lines for the first time.

"This is" Through the amount of soul power, on the inner wall of the Black Emperor Ding, the lines that had become completely clear were presented in Han Chen's mind.

Looking at these line traces, Han Chen was instantly stunned, he didn't expect that there was a secret hidden on the inner wall of the Black Emperor Ding.

The momentary loss of consciousness caused the samadhi true fire to stop and continue to rise. And as the temperature stabilized, the traces of lines on the inner wall of the Black Emperor Ding, which emitted a faint light, quickly dimmed, and then became blurry and slowly disappeared.

And Han Chen, who noticed this, was slightly startled, and instantly came to his senses, and Han Chen, who came to his senses, frowned, because he had no other way to disappear the traces of this line, after all, he had only just noticed it.

"Raise the temperature of the Samadhi True Fire!" At this moment, Guiguzi's voice sounded in Han Chen's mind.

Hearing this, Han Chen's eyes flashed, and he instantly understood the meaning of Guiguzi, his heart moved, and the true yuan in his body surged out like a rolling river.

Rumble!

The pale cyan flames in the ding were urged by Han Chen's soul power, as if they had broken free from their restraints, and quickly ascended.

As the temperature of the flame increased dramatically, the blurred lines on the inner wall of the Black Emperor Ding suddenly became clear again, and the speed was much faster than before.

The lines quickly woke up, and then a faint ray of light emanated from these lines, and the light became stronger and stronger, making the lines clearer and clearer.

Han Chen and Guiguzi's soul power continued to sweep over these glowing lines, and the traces of the lines also clearly appeared in their minds.

It's just that as they continued to observe, the brows of the two were tightly furrowed.

"I don't have the slightest clue at all!" Han Chen whispered in his heart.

"It looks like it's just random scratches, disorganized, and you can't see the slightest abnormality at all!" Guiguzi also responded.

Despite this, both of them understood that the glowing lines in the Black Emperor Ding were definitely not so simple.

Because no one will be bored with the scratches on the inner wall of this six-grade spiritual artifact level, and there are no scratches that can change with the change of temperature.

Everything shows that these lines and scratches on the inner wall of the Black Emperor Ding are not ordinary things.

"Push the temperature of the Samadhi True Fire to the extreme, take a look!" Guiguzi's voice sounded in the sea of knowledge.

Hearing this, Han Chen exhaled lightly, pushing the Samadhi True Fire to the extreme, the consumption of the True Yuan would become very terrifying, he had already tried it when he was refining the Qingluan Divine Bird.

Although his true qi cultivation is much stronger now than it was back then, the Samadhi True Fire at this time has also advanced to the Triple Heaven realm, and the consumption of true yuan has not weakened, but has become more terrifying.

But Han Chen didn't flinch in the slightest, because he also wanted to see what secrets were hidden in these line marks on the inner wall of the ding.

Stretching out his hand, he took out a jade bottle from the empty ring, unplugged it, three Hui Qi Pills everywhere, put away the jade bottle, and then stuffed the three Hui Qi Pills into his mouth, but he did not swallow them, but hid them under his tongue.

After doing this, Han Chen's gaze suddenly froze, his heart moved, and he controlled the flames and quickly rose up.

Inside the ding, the flames that had been sharply raised suddenly trembled, and then erupted like a wild horse on the loose, and like an erupting volcano.

The color of the flame quickly darkened, from pale cyan to cyan, and at this time, the temperature of the flame had risen to an extremely terrifying level.

Compared to the increase in the temperature of the flame, the consumption rate of the true yuan in Han Chen's body was not slow, but in just five breaths, he directly consumed one percent. (To be continued......)

PS: (The first update is delivered!)