Come to the cave world.

The moment he opened his eyes, Nian Chen was stunned.

Ten meters away, Master's greasy and sloppy figure sat cross-legged.

In front of him, in a huge furnace several times taller than the water tank, the sound of boiling water sounded.

Underneath the huge furnace dome, a circle of pure cyan fire nets shrouded it.

Around the furnace, there are faintly runes around, densely packed, and the number is so large that I am afraid that it is not less than a million.

These runes are not arranged in a mess, but form a circle and a semicircle, enveloping the big tripod layer by layer.

Even if Nian Chen is lonely and unheard, he can recognize at a glance that this is a formation composed of millions of runes!

Next to the big ding, there is a small formation built on the basis of jade, and the runes in the formation are also shining.

What shocked Nian Chen the most was that there were countless three-inch flying swords suspended in the formation, at least six or seven hundred in number, exuding the aura of various different attributes, and with the runes shining, these flying swords were slowly swimming like small fish in the formation.

In addition to the flying sword, there is also a palm-sized shield in the formation, which seems to be made of turtle shells, and there is a faint ancient gossip pattern on it.

There is also a silk shoulder, as well as a yellow mini clock, quietly suspended in the middle of the formation, surrounded by flying swords.

"Master, I'm back!"

Nian Chen shouted softly.

The sloppy old man who was sitting in front of the boiling tripod raised his hand slightly......

An elixir slowly flew in front of Nianchen.

"Take the pill!"

Nian Chen took the pill and threw it into his mouth without hesitation.

The elixir melted in the mouth, turning into a liquid with an inexplicable breath and flowing down the throat.

"Master, is this the longevity pill that can increase my vitality for fifty years?"

The sloppy old man nodded slightly:

"Memorize this set of qi routes, and then try to use this route to operate mana, there must not be the slightest mistake!"

Before the words fell, Nian Chen felt a slight swelling and pain in the sea of soul consciousness, and then there was a figure sitting cross-legged in his mind.

On this figure, there are lines of threads, dense as spider webs.

Nian Chen took a closer look and found that ......

These lines start from the dantian qi sea, gradually spread to the body's internal organs, then the bones and flesh, and then the meridians and acupoints, and then penetrate into the body's skin, and finally converge into tens of millions, and then flow back to the meridians, melt the flesh and blood, walk the bones, return to the five internal organs, and return to the dantian qi sea, and the cycle repeats, the cycle is endless.

Such a complex line is as dazzling as the stars in the night.

However, Nian Chen discovered that the person who had just merged into the sea of soul consciousness had a powerful divine consciousness in addition to the human phantom covered with mana running lines.

This divine sense is extremely powerful, but it is not aggressive, but it assists himself to clearly sort out this extremely complex set of lines.

This makes complex lines that would otherwise be almost impossible to remember clear and organized.

Nian Chen did not dare to slack off in the slightest.

Begin to try to comb through these lines over and over again, keeping in mind these running lines......

However, things are not so easy.

These lines are just too complicated!

Even though Nian Chen's mental power was already strong and he had already reached the point of unforgettable, it took three months just to sort out the myriad threads of these lines.

Fortunately, the spiritual power has already reached a state where it can be divided into hundreds of thousands.

In the past three months, Nian Chen has been combing through the mana operation line, while silently running the Five Qi Returning Yuan Gong, swallowing the aura of heaven and earth and integrating it into his body, which not only achieves the purpose of cultivation, but also keeps his spirit and mana at the peak at any time......

It wasn't until he completely sorted out the rules and clues of the running lines that Nianchen began to memorize the operation of each line.

This process took another three years!

And the sloppy old man in front of the big ding, in that circle of pure green flames that will never be extinguished, has been boiling, sloppy old road waved his right hand from time to time, and all kinds of elixirs, ores and strange things flew in the storage ring, integrated into the boiling big ding......

Finally, three years and three months later, Nian Chen has completely memorized the whole set of routes in his heart, and nothing has been missed.

Next, the sloppy old Taoist asked Nianchen to try to follow this set of mana operation routes and start to exercise qi.

Again, it was a difficult and long process.

This set of qi routes is completely different from the Wuqi Guiyuan Gong operation route that Nian Chen has long been familiar with.

As soon as he tried, Nian Chen felt that the mana was taking care of one thing and the other in his body, not to mention that thousands of lines were running at the same time, and it was difficult to control even one......

However, Nian Chen still gritted his teeth and persevered, trying over and over again.

Time passes slowly.

Another ten years have passed!

After thousands of painstaking attempts, Nian Chen finally ran this set of running routes smoothly throughout his body, and became more and more proficient, and finally reached the point where his mana could automatically run according to this set of routes as soon as his mind moved......

And in the past ten years, it has been used to learn the operation of the mana route, and there is no time to cultivate at all, which is equivalent to wasting it in vain!

This made Nianchen's heart very depressed.

This person's Ding inheritance is too harsh!

Before it officially started, it took me fifteen or sixteen years.

This is also the result of the master using his powerful spiritual power to assist him.

If it's your own, I'm afraid you won't be able to succeed in a hundred years!

Miraculously, the big tripod has been boiling for more than ten years, never stopped, and the pure cyan fire net under the tripod will never be extinguished, and it has been emitting terrifying high temperatures, so that the cold marrow in the big tripod has been boiling.

In the past ten years, there have been tens of thousands of various elixir materials thrown into the Dingzhong by the master, but there is no sign of overflowing of the cold marrow liquid in the Dingzhong.

"Master, this set of exercises, I can finally run as I wish!"

Nian Chen said excitedly to the sloppy old man.

"Are you sure?"

The sloppy old man asked very seriously.

Nian Chen nodded: "Disciple is sure!"

The sloppy old man reminded again: "We must reach the point where we can run as we wish when we move our minds, and there must be no mistakes!"

Nian Chen is full of confidence: "There will be no mistakes!"

The sloppy old man finally nodded:

"Well, the next step is the most critical step of the Ren Ding inheritance - refining the flesh in the Ding and fusing the rune formation. ”

"As a teacher, I want to remind you that even a demon beast known for its physical strength can't bear that kind of pain at all!"

"Even if you have an old man by your side, the risk is very great, the kind of torture of being thrown into a volcano with a thousand knives, sometimes falling into a 10,000-year-old ice cave, will definitely collapse!"

Nian Chen's face showed a trace of unwavering firmness: "Master, the disciple has already been ready, if he can't improve his strength and fight side by side with the master, the disciple would rather die in this great tripod refined by the cold marrow!"

The sloppy old man nodded with satisfaction: "Remember, the will is as firm as iron, just treat the body as if it is not your own, just use your spiritual power to firmly guard the soul consciousness sea, and urge the mind to drive that set of mana operation routes, and leave the rest to the master!"