After leaving the Heavenly Emperor City, Zhou Tong found a hidden place on the road and opened a cave mansion casually.

"With so many Heaven and Earth Spiritual Extracts, it should be able to push my cultivation to the Nine Heavens of the Imperial Sky, or even go one step further and reach the Nirvana Realm!" Zhou Tong looked at the big bag of heaven and earth spirit essence in front of him, and a trace of joy flashed in his eyes.

The Heavenly Emperor Chenghai family is really a big business, and there are thirteen Heaven and Earth Spirit Extracts of the level of thousand-year-old blood ginseng in their family's shop, and after selling their family property, they have obtained as many as two hundred and eighty-two plants, plus the spirit extracts that Zhou Tong originally owned, adding up to three hundred and three.

"The Hai family's real estate is more than ten times the working capital, and I'm sure those people in Heavenly Emperor City must have secretly lowered the price...... If you wait a while, you can get at least fifty more spirit extracts! Zhou Tong said secretly in his heart.

He himself demanded that all buyers should use Heaven and Earth Spirit Essence to trade, which was tantamount to self-deprecation, because no one would take out so many Heaven and Earth Spirit Essence at once in a short period of time. If you give them a certain amount of time, the bid will be fierce when the time comes.

However, Zhou Tong doesn't care about it now, because it was a business without capital, and it was the Hai family who suffered, not him. Being able to get nearly 300 spirit extracts at one time is already very rebellious.

"It's time to practice!" Zhou Tong quickly reined in his mind and directly grabbed a handful of lotus seeds and stuffed them into his mouth.

The lotus seed entered his abdomen, and suddenly a cool breath poured into his heart, and from his abdomen began to spread out to the limbs, and the extremely rich aura gradually precipitated in his body, especially the drifting rain on the deep sea.

Seven days later.

The essence of heaven and earth was constantly refined into the deep sea in the body by Zhou Tong, and at the same time, wisps of power overflowed from the deep sea and flowed all over the body.

"Boom!!"

Suddenly, there was a loud noise, as if something had broken in his body, and a stream of life essence rushed out of Zhou Tong's body, pouring into his body, making his body full of an unpredictable light.

After a long time, this mysterious light slowly dissipated and disappeared into Zhou Tong's body.

At the same time, Zhou Tong still did not stop refining the spirit essence, the fog over the deep sea was filled, and the raindrops were falling down tricklingly, constantly turning into the potential in the deep sea, making this ocean deeper and deeper.

Time continued to pass, another seven days passed, and after half of the three hundred spirit extracts were consumed, a life essence finally appeared in his body again, and once again re-brushed his physical body.

Suddenly, Zhou Tong had already advanced to the Nine Heavens of the Imperial Sky.

For the next half a month, Zhou Tong was still quietly refining the remaining spirit essence. In the process of refining, although he could not go further and enter the Nirvana realm, Zhou Tong could also feel that the power in his body was getting thicker and thicker, and the exuberance of the life essence in his body had reached a very terrifying level.

"The spirit essence has been refined, and it is time for Nirvana next!" Zhou Tong refined all the spiritual essences and laid the foundation to the most solid before he made up his mind to enter the Nirvana realm.

Nirvana Realm, this is the most special realm in the cultivation system of the Immortal Realm.

Advancing in the cultivation system of this world, everyone's aptitude and root bones are different, so many people with lower aptitude can hardly catch up with some smart people even if they put in several times the effort.

And the cultivation method of this world, if you want to improve your qualification potential, the only chance is the Nirvana realm.

Nirvana realm, for practitioners, is equivalent to clearing the past to zero, allowing the monk to undergo the most essential transformation and regeneration, and step to a new height.

Of course, the vast majority of monks will die when they are in this realm, and only a few will be able to rush up.

"Nirvana Realm...... If I'm not mistaken, this realm looks very similar to the Nine Lives and Nine Deaths Transformation of the Secret Realm of the Heaven-Covering Sea on the surface, but in fact it is even more mysterious! Zhou Tong silently compared these two realms in his heart.

The transformation of the Nine Lives and Nine Deaths in the Wheel Sea Secret Realm is essentially the release process of the angry and dead qi in the Wheel Sea. With the help of the reincarnation in the release of vitality and death, the monk further enhances the potential contained in the door of potential in the body.

But in the Nirvana realm of the Immortal Realm, it not only enhances the potential in the monk's body, but also changes the monk's spiritual things. This is an opportunity to improve your qualifications and understanding.

Of all the cultivation systems that Zhou Tong has ever seen, he has never seen anything like this, improving a person's qualifications and comprehension!!

"Nirvana realm, let's start now!" Zhou Tong completely sealed his temporary cave mansion, and then began to cultivate silently.

Time passed, and Zhou Tong had re-transformed into a prototype, and a cyan tyrannosaurus was lying quietly in the cave. He was petrified, silent and motionless.

The brilliant cyan dragon scales on his body gradually faded in the process, and the dust in the cave also accumulated on him little by little, making him look like a sculpture.

Time continued to pass, and the luster on Zhou Tong's body became more and more dim, and in the end, he seemed to be really dead, without the slightest life fluctuation on his body, and the dragon scales and dragon horns all over his body did not have the slightest luster, like a corpse that had been dead for several years.

Zhou Tong's own divine consciousness also seemed to be extinguished, he couldn't feel anything, he couldn't hear, couldn't see, couldn't smell, and seemed to be completely extinguished.

It was only later that he faintly heard the sound of waves in his body. And it was only at this time that he regained his breath of life from the death-like silence, and there were life fluctuations.

For a month, he had been motionless, completely entering the realm of Nirvana, and had already passed the first level of death.

"Click!!"

At this time, the dragon scales on his body cracked again, and then a new green dragon came out of the crack.

Today's Zhou Tong, his body shape has changed again, and his body form has not changed, but his hind legs have completely transformed into the form of the ancestral dragon's eagle claws and tiger palms.

He floated silently in mid-air, awake but not moving, feeling the changes in himself. Powerful power flowed in his body, surging like the Yangtze River, like the mighty waves of the Hanhai Sea, and he felt that there was endless power in his body.

Even, he felt that his divine consciousness was more agile, and many things that he had never thought of in ordinary times all came to his heart at this moment, and he even had a new understanding and perception of some previous exercises, supernatural powers, and combat techniques.

"Is this feeling really my perception improved?" Zhou Tong was also very surprised in his heart, if he really further improved his understanding on the basis of his original, it would be heavenly.