Inside the Daoist Tower, there was a lot of knowledge about the formation, Li Shengtian had been busy improving his cultivation before, and he didn't bother to study it seriously, this time, he decided to take some time to improve his formation level.

Yi Duo does not pressure this truth, Li Shengtian has understood it for a long time, and he has also tasted the benefits it brings, such as his current alchemy level, he can already refine a fifth-level elixir, at least he doesn't have to worry about where to buy the pill!

In the eighth floor of the Dao Tower, everyone returned to their original retreat venue.

"Mo'er, Xie Yu, you can each cultivate with peace of mind, and the matter of controlling the shuttle can be left to a few of us men!" Li Shengtian said with a smile.

"Well, Brother Li, Sister Mo'er and I won't be with you anymore!" Hua Xie said with a smile, taking Li Mo's hand and walking to the grass thatched hut.

You'll have to go to the fifth dimension and take a look.

Li Shengtian's divine consciousness moved slightly, and his figure appeared in the fifth layer of the Dao Tower, which was the place where the Dao Sect stored exercises and other classics, and there were no less than 10 million books inside. Of course, the content is also all-encompassing, what is the way of refining, the way of talismans, and the way of puppets, there are all there, but some books record them in detail, and some of them are generalized.

Li Shengtian found a large number of books on formations, studied and figured them out, and devoted himself to the knowledge of formations.

Time slipped away silently, and the shuttle traveled farther and farther away in the starry sky.

When ten years have passed since the outside world, the space of the Dao Tower has also gone through one hundred and eighty years.

In more than a hundred years, Li Shengtian's formation level has been greatly improved, and he can now easily arrange a fifth-level immortal array. As for the sixth-level immortal array, his current realm is not yet able to do it, according to his estimate, he needs to retreat and study for a few hundred years before he can come.

"Ten years have passed outside, and now it should be Uncle Shui Wuxian who is driving the shuttle!" Li Shengtian said in a low voice.

He was the last to control the shuttle, because the last leg of the voyage was the most dangerous, that is, to cross the Shattered Star River, and only after crossing the Broken Star River could he have a chance to reach the Clear Water Heavenly Domain.

Li Shengtian decided to continue his retreat and practice, and this time he would no longer study the formation, and he would still improve his cultivation to improve it. However, before retreating again, he decided to do one thing, and that was to refine the prohibition on the ninth layer of the Dao Tower.

For so many years, he had been trying to refine the ninth layer of the Dao Tower, but he had been unsuccessful. Now that he has been promoted to the Heavenly King Realm, the power of his divine sense has increased greatly, and he will definitely be able to refine the ninth layer of the forbidden system.

Li Shengtian was very curious about what was hidden in the ninth layer, because the immortal aura of the entire Dao Pagoda seemed to be emanating from the ninth layer space, so there must be a very rich spiritual energy stored in the ninth layer space, if this was the case, it would definitely be good news for him.

Li Shengtian immediately disappeared from the fifth layer of space, and the next moment, he came to the ninth layer.

The stone ball was still floating silently, exuding an enchanting luster.

Holding the stone ball with both hands again, Li Shengtian's divine sense entered the innermost part of the stone ball and began to refine the ninth layer of prohibitions one by one.

In this way, Li Shengtian remained motionless, like a stone statue.

The complexity of the ninth layer prohibition of the stone ball was even more difficult than the previous eight layers of prohibition combined, and Li Shengtian felt that such a prohibition had gone beyond the level of the immortal realm, and it was likely to be a divine forbidden.

Fortunately, as long as he was willing to expend the power of his divine consciousness to wear down the forbidden patterns, he could unlock the prohibition, but he didn't need to understand the principles of the prohibitions and understand their mysteries.

What Li Shengtian didn't expect was that it actually took him eight years to refine this time.

Eight years later, Li Shengtian finally gnawed on this layer of prohibition.

In the past eight years, Li Shengtian wanted to give up countless times, but finally gritted his teeth and persevered. Because of his curiosity, he couldn't give up exploring the space on the ninth floor of the Ask Tower.

After Li Shengtian broke the ninth layer of prohibition, the whole person looked extremely tired, and in eight years, his divine consciousness had not been relaxed, and he had been in constant consumption. Fortunately, he had a mirror that could restore his tired consciousness.

And after eight years of continuous training, his divine sense has become more tenacious and powerful.

"I see, it turns out that there is a superb immortal vein buried in the ninth layer of the Dao Tower!"

The immortal veins are the same as the spiritual veins in the cultivation realm, and are divided into four levels according to the intensity of the spiritual energy they contain, which are small immortal veins, medium-sized immortal veins, large immortal veins, and superb immortal veins.

The immortal aura contained in a superb immortal vein is ten times that of a large immortal vein, and the large immortal vein is ten times that of a medium-sized immortal vein, and so on, no wonder the immortal aura of the entire Dao Pagoda space has never been reduced, but it turns out to be this reason.

However, this ninth-layer space did not have the function of time acceleration, and Li Shengtian did not feel so disappointed. The time acceleration of the eighth layer of the Dao Tower made him very satisfied, he was not a greedy person.

After the ninth layer of forbidden refining, the Dao Tower was truly in Li Shengtian's hands.

Now that he understood the source of the aura, Li Shengtian also calmed down. He was going to meditate in the ninth layer space, because the immortal aura here was too strong, and when he hadn't refined the ninth layer of prohibition before, he couldn't enter the space inside, and now with the unsealing of the ninth layer space, a large amount of rich immortal aura suddenly poured from inside.

Li Shengtian sat directly cross-legged and began to absorb the immortal aura to cultivate.

Although there is no time acceleration function here, the victory is strong in the immortal aura, and Li Shengtian decided to take this opportunity to rush the cultivation upward.

The surrounding rich immortal aura almost didn't need to be specially absorbed, and it drilled directly into the skin, Li Shengtian suppressed the excitement in his heart, and quickly transformed the immortal aura that entered his body into mana and stored it in the dantian space.

His cultivation also began to climb rapidly, and half a month later, Li Shengtian stepped into the second layer of the Heavenly King Realm, and a month later, he successfully entered the third layer of the Heavenly King Realm!

Li Shengtian's cultivation was so smooth that his whole heart was immersed in it and he forgot the time.

Another decade has passed, Li Shengtian has not left the customs, and he is still concentrating on cultivation.

When Xu Anqiang appeared at the front of the shuttle as the fourth person to control the shuttle, thirty years had passed in the outside world. Now, their shuttle is traveling through the spatial cracks within a range of millions of miles, Xu Anqiang has been cultivating in the Dao Tower for nearly six hundred years, plus the abundant immortal spirit qi and elixir in the Dao Tower, his current cultivation has reached the early stage of the Heavenly Monarch Realm. However, in the face of this place full of spatial rifts, his whole heart hangs in the air, because if one is not careful, he will take the entire shuttle to be swallowed by the spatial rift.

In this way, Xu Anqiang manipulated the shuttle, passing through the edge of the spatial crack again and again, and every time he successfully passed through, he couldn't help but sweat.