May I seek good fortune and avoid misfortune, and live a long and prosperous life.

Unbeknownst to Li Heng, just as the five wooden roots were absorbing wisps of white mist, a huge vortex formed above the cave, drawing all the white mist into it and then into the cave, where it was absorbed into Li Heng's body.

At this moment, on a distant fairy island overseas, there was a pavilion. Inside the pavilion, an old man with white hair and dressed in blue robes, who was meditating on a futon, suddenly opened his eyes and looked towards the direction of the huge vortex above the Poison Dragon Pool cave.

"Someone has broken through to the Celestial Realm, and the commotion is quite significant. Their foundation is definitely solid; they're no ordinary Celestial Realm cultivator! Perhaps they're another promising talent!"

"That location seems to be within the territory of the secular dynasty of Chu."

"Very well, I've been in seclusion for too long, it's good to go out and get some exercise, and bring this promising talent over." The white-haired old man in blue robes got up and walked out of the pavilion.

......

Poison Dragon Pool Cave.

Just as Li Heng was shocked by the change in his dantian, a piece of information suddenly rushed into his mind.

1. Any expert above the Celestial Realm shall not attack or kill mortals below the Celestial Realm (Qi Refining stage) without cause; violators will be punished by Heaven!

Second: One must not possess a mortal body; those who violate this rule will be punished by Heaven.

Third: One must not linger too long in mortal countries, or one will be punished by heaven.

"This rule is for experts in the Celestial Realm? Does that mean I've already advanced to the Celestial Realm?" Li Heng asked in surprise.

He was so surprised because he had been promoted passively.

Li Heng did nothing. The five-colored small wooden root in his body automatically absorbed the five-colored mist, then separated and filtered it, absorbing the essence and discarding the dross. Finally, it released five strands of pure gas to eliminate the liquid internal force in his dantian, replacing it with the gas that remained in his dantian.

Is this the process of advancing to the Celestial Realm?

The gas within the dantian is a sign of becoming a Celestial Realm expert; it is a power even more advanced than internal force.

That should be it. Li Heng carefully sensed the five different colored gases in his dantian and then tried to mobilize these gases.

Li Heng then successfully mobilized a wisp of crimson gas, and with a wave of his palm, a large amount of fire-attribute spiritual power appeared in his palm, blasting the stone table in the cave into dust.

"This wisp of crimson gas is so powerful? It's much stronger than the liquid internal energy I had after ten cycles of rebuilding my power. Is this the power that distinguishes the Celestial Realm from the Innate Realm?"

Ten days later, he discovered that the five wooden roots inside his body were constantly absorbing the five-colored mist from the outside world, although the speed was extremely slow.

Meanwhile, the five-colored pure gas in his dantian also increased. They were clearly separated, each occupying its own corner, and would never mix together.

However, since he did not have the cultivation techniques for the Celestial Realm, his dantian was still empty, and there was too little of the five-colored pure gas. Relying on the five wood roots to absorb it on their own would be too inefficient.

"However, there's no other good way right now, we can only wait it out."

He planned to wait until the five-colored pure gas filled his entire dantian before emerging from seclusion.

......

one year later.

Poison Dragon Pool Cave.

Li Heng suddenly opened his eyes, a glint of light flashing in his eyes, and he got up and left the prayer mat.

He was covered in dirt and stickiness.

It turned out that he discovered the five-colored mist he inhaled also had the effect of tempering his body, like cleansing his marrow and bones, making his body stronger.

He quickly took off his clothes and jumped into the Poison Dragon Pool for a good bath.

After taking a shower, Li Heng noticed that his hair and beard were extremely thick; if he didn't trim them, he would look like a wild man.

Half an hour later, Li Heng looked at himself in the bronze mirror and found that a handsome young man was also looking at him.

"So my appearance isn't so bad after all, haha." Li Heng put down the bronze mirror and adjusted his true appearance to that of a seventy-year-old.

"It took a year for the five-colored pure energy in my dantian to finally fill up. It was really not easy. If I had a cultivation technique at the Celestial Realm level, this time would be greatly reduced," Li Heng said with emotion.

During that year, he summarized a lot of cultivation experience at the Celestial Realm.

For example, through internal observation, he also discovered that once the dantian was full, the five wooden roots would stop absorbing the five-colored mist.

For example, he discovered that when he used the five-colored pure gas to unleash his old moves, the power was completely different from before, and it was terrifyingly powerful.

At this moment, Li Heng finally understood why Heaven had set down the rule that Heavenly Realm experts were not allowed to deal with mortal martial artists (including Grandmaster martial artists). It was because if Heavenly Realm experts really intervened in the mortal world, the destructive power would be too great, and the mortal world would be completely destroyed.

In fact, what Li Heng didn't know was that when he broke through to the Celestial Realm, he dared to introduce so much spiritual energy into his body. Although it was introduced passively, in the eyes of other Celestial Realm experts, it was a sign of madness and courting death!

Even for ordinary Celestial Realm experts, the mere presence of those five-colored spiritual energies entering their bodies is an extremely agonizing and painful cultivation process.

They dared not introduce too much spiritual energy into their bodies at once, but only slowly introduced it bit by bit, for fear that their bodies could not withstand it and that the meridians in their bodies would be destroyed.

Because these five-colored mists are so domineering, if you're not careful, these spiritual energies will rampage through your body, causing serious damage to your meridians and internal organs, which could be life-threatening.

Li Heng, on the other hand, was different. His physique had reached the limit of the mortal realm, and his physique was terrifyingly strong. Even if these spiritual energies ran rampant throughout his body, they could not cause him much harm. His body was too solid inside and out.

Furthermore, there is another piece of knowledge that Li Heng is unaware of: others need to have spiritual roots to break through to the Celestial Realm, which are the same as the wooden roots in Li Heng's body.

Without spiritual roots, even if this grandmaster is exceptionally talented and has extremely high aptitude, he will not be able to advance to the Celestial Realm.

After acquiring a spiritual root, most cultivators must actively sense its existence, then slowly sense the spiritual energy of heaven and earth, and finally cautiously try to gradually introduce the spiritual energy of heaven and earth into their spiritual root.

This process usually takes about half a month to complete.

After completing this operation, once the spiritual root absorbs and filters the spiritual energy, it will generate a wisp of pure spiritual power. Only when that wisp of pure spiritual power is released into the dantian and completely destroys the internal energy can the cultivator truly advance from Grandmaster to Celestial Realm.

Without guidance, this advancement process is very risky and could potentially lead to damage to the meridians and even death. This is why there are so few experts at the Celestial Realm.

Li Heng's advancement process was completely different from that of ordinary Celestial Realm experts. He did not advance voluntarily, but rather his body began to advance voluntarily after it had reached the Great Perfection inside and out.

Moreover, the promotion process was extremely smooth, without the slightest obstacle.

Those five-colored mists, which were like ferocious tigers to other Celestial Realm experts, turned into kittens in front of Li Heng, posing no danger whatsoever.

As a result, Li Heng completed his breakthrough in less than an hour.