This is the power of the sixth-level formation, Du Feng hid everything inside through the formation. From an outsider's point of view, the scenery here has not changed in any way, in fact, there are people, trees, water and soil and other factors hidden inside. In other words, the scenes seen by outsiders are all imitated one-to-one.

"Still taking medicine, master, what do you want to do. ”

Du Feng sat down cross-legged in the formation, and did not start to break through immediately, but took out a bottle of Ning Hua Dan and ate it. Ning Hua Dan is a pill used by martial artists in the Guiyuan period to practice and supplement the true yuan. These are all people who are about to break through to the Void Sea Realm in minutes, what are they still eating this thing for?

"Shut up, you know the shit!"

The ghost servant's nagging annoyed Du Feng. It was precisely because Ning Hua Dan was the elixir needed by the martial artists of the Guiyuan period that he chose to take it at this time. After breaking through to the Void Sea Realm for a while, these medicines have no effect. Although he is in a slow state now, he can still add another fire.

Du Feng took a few more bottles of Ning Hua Dan, took out a black crystal the size of a skull, and placed it on his lap, and then began to officially exercise. If outsiders see his breakthrough method, they will probably be shocked to drop their jaws. That's a few bottles of Ning Hua Dan, not a few. Even if you are about to break through to the Void Sea Realm, you haven't really broken through yet. The martial artists of the Guiyuan Realm eat so much Ning Hua Dan, they are not afraid of bursting their bodies.

The medicinal power of Ning Hua Dan gradually began to work, and Du Feng's face began to become more and more red. From the face to the neck, and then the skin of the whole body turned red, like a boiled crab.

"Whoosh......"

At this moment, a huge black shadow streaked over the woods. Through the Netherworld Eye set up outside, Du Feng saw everything clearly. It was a huge black eagle flying by, carrying a man on it. He looked around, as if looking for something.

If there was no formation to cover, he who was practicing would have been discovered at this moment. When the time comes, whether the wood spirit girl can stop it or not, it will be a troublesome matter. Because he was at a critical juncture in his practice, he was not allowed to move casually.

A large amount of medicinal power dissolved in the abdomen, flowing from the dantian to the limbs and hundreds of bones of the body. Du Feng was not in a hurry to impact the Void Sea Realm, but strengthened his body with the help of medicinal power. In particular, the meridians are very important for warriors. If you look closely, you can see that the red color on his arm is especially obvious, and the blood vessels seem to be about to burst.

As expected, since the fusion of the gibbon, the amount of yuan power needed for the arm has increased. Du Feng directed the medicinal power to his arm, which immediately triggered some reactions. First the blood vessels thickened and congested, then the bones began to rattle, and even the knuckles of the fingers made a series of crunching sounds. He got his arm and put it into the steel-making furnace, burning it until it didn't work. If it weren't for the strong perseverance, I'm afraid I would have fainted from the pain at this moment. If you want to be stronger than others, you really have to suffer more.

"Someone ......"

At this moment, a faint gray figure approached Du Feng's practice position. If it weren't for the fact that he had several Nether Eyes outside, he could be observed from multiple angles, and it would not be easy to spot that figure. That's not a human being at all, because he's basically transparent.

Could it be the Shadow Clan? Du Feng had also heard about the Shadow Clan, but he had never seen it with his own eyes. There is an outline of a human being, but the true face is not visible, which does match the characteristics of the legendary members of the Shadow Clan. This exploration of the Three Mountains Secret Realm, how much interest attracted it, and even let the people of the Shadow Clan intervene.

The ShadowClan member seemed to sense something, and searched back and forth in the surrounding area. Because Du Feng landed in the lake before, and walked around there again. Although it has been dealt with, there are still a few traces left. The people of the Shadow Clan are really powerful, and even such a small clue can actually attract his attention.

"Plop Plop Plop ......"

Du Feng felt his heartbeat accelerating inexplicably, and he actually had a feeling of being targeted by an ancient giant beast. He had every reason to believe that with his current state, he would definitely not be able to beat the Shadow Clan member outside, and even a single photo might be killed in an instant.

You must know that when he was in the Returning Yuan Period, he was already able to fight against He Qing and other Void Sea Realm cultivators. But the member of the Shadow Clan didn't have the slightest breath out, but Du Feng felt fear inexplicably. If he hadn't been hiding in the sixth-level formation at the moment, but had sat outside to practice, I'm afraid that he and the little life of the Wood Spirit girl would have been gone.

"Hiss......"

Thinking about it, I still felt a chill in my back, the man riding the giant black eagle just now was really looking for something, and this Shadow Clan member was also looking around, who were they looking for, why did they just come in and engage in such a big battle. Du Feng temporarily suppressed his cultivation, fearing that if he broke through at this moment, the true yuan would leak out of the formation. Because he wasn't sure if the ShadowClan members would be able to penetrate the formation.

Fortunately, the formation arranged by Du Feng itself had a concealment function, and the faint gray shadow found nothing after searching for a while, and chased it in one direction. The direction he chose was exactly the same as the direction in which the black eagle flew away.

"Broken!"

After the members of the Shadow Clan left, Du Feng hurriedly mobilized all the True Yuan in his body and went straight to the Void Sea Realm to cultivate. He had to break through to the Void Sea Realm quickly, otherwise he wouldn't even have the strength to resist when he encountered those masters. With this broken word exit, his cultivation has been rising step by step.

In the early, middle, and late stages of the first layer of the Void Sea Realm, the Yuan Power and the medicinal power of Ning Hua Dan accumulated before after arriving here had been exhausted, and Du Feng's dantian capacity was too large, and the amount of True Yuan required when breaking through was naturally very large. He hurriedly hugged the black crystal and began to absorb it frantically.

With the injection of pure Yuan Force, Du Feng's cultivation began to climb up again, easily entering the second layer of the Void Sea Realm, then the middle and late stages, and then breaking through to the third layer of the Void Sea Realm. It is worthy of a black spar, and at this moment the size of a skull, it is indeed more useful than a million blue crystals.

It takes months for a million azurites to absorb. And this black crystal the size of a skull, due to the extremely high concentration of Yuan Force, was absorbed by Du Feng in a while, and his cultivation was raised to the late stage of the third layer of the Void Sea Realm in one go.

"Mana transfer!"

This is not the end, Du Feng then cast a mana transfer. The Yuan Force that existed in the ghost servant's body before was frantically transferred back. The cultivation that had originally stopped at the late stage of the third layer of the Void Sea Realm began to climb upwards again, and this time I don't know what kind of height it will reach.