After observing the mysterious rust sword for a long time, but still finding nothing, Qin Chen had no choice but to put away the mysterious rust sword.

As for the evil array plate, after being absorbed with all the black aura, it turned into a powder all over the sky, with nothing left.

Only the fire worm and the Qi-eating ant were still filled with an evil aura, as if some mysterious changes had occurred under the transformation of this black aura.

Qin Chen searched for a long time with concern and found that these black auras had no harm or impact on the Qi-Devouring Ants and Fire Refining Worms, and then he retracted the Fire Refining Worms and Qi-Devouring Ants into the black gourd.

Where Ge Peng and his team were already transformed into ashes, and only a few storage rings were left there. Qin Chen raised his hand and put them in his bag.

They are all powerful Wuzong people who have been practicing in the Black Death Swamp for many years. They must be very rich, right?

Not to mention anything else, the black melon that I heard in the Black Cultivation Society and the black lantern root I just saw are already of great value.

However, Qin Chen didn't have much time to check out the storage rings of several people. After putting them away, he quickly looked at Ku Yunzhi's place.

The entire underground ruins were in a mess, full of gravel and cracked array flags, but Ku Yunzhi, located in the ban, was extremely safe and was not affected by the previous explosion.

At this time, Qin Chen even felt grateful for the defensive restriction. If it weren't for this defensive restriction, it would be impossible for Ku Yunzhi to be safe and sound.

At this time, the ban had been blown away by the previous Liuhe Sacrifice and Refining Formation. Qin Chen came closer and carefully observed the ban.

There are similarities between prohibitions and formations, but they are much simpler than formations. Some powerful warriors can set up some simple restrictions, but the real advanced restrictions are not simpler than complex formations, and they are even much more powerful.

Originally, Qin Chen thought that this ban was not a problem for him, but after he saw the entire ban, he immediately knew that he was wrong.

The defensive restriction in front of him was very complicated, and the dense structure made him dazzled, which was beyond his expectations.

Even Qin Chen was sure that even in his previous life, he could not set up such a ban.

Moreover, if Qin Chen had not learned a new method of ban in Gunandu Middle School, he would have even felt that he would not even understand the ban in front of him.

"Who arranged this?"

Qin Chen's scalp was numb. He had only seen this restriction outside the formation before. Although it was very complicated, he thought it would not be difficult to break it with his own restriction cultivation.

Now it seems that this is simply extremely difficult.

Qin Chen's heart immediately sank. Unexpectedly, after experiencing this life and death, there was still such a difficult problem to get Ku Yunzhi.

My heart suddenly felt bitter.

"This ban is indeed very complicated. It is not easy for me to untie it. However, since the Liuhe Sacrifice Refining Formation can open a gap in this ban, it means that the ban has become extremely weak over the long river of time, and it is not impossible to break it."

After only a moment of depression, Qin Chen soon became excited.

The ban, like the formation, also requires the activation of energy.

Once a ninth-level formation loses its energy, it will lose its efficacy, and it is even worse than a first-level formation.

And the same is true for the ban.

Qin Chen knew very well that if the ban was still in full state, let alone the Liuhe Sacrifice Refining Formation, a stronger formation would not be able to break through it at all.

But the Liuhe Sacrifice Refining Formation was able to break a corner of the ban. Obviously, although this ban is strong, the energy it contains may have dissipated almost as much as the passage of time.

If it were another formation master, even if there was only a little energy left in this restriction, it would not be possible to break it easily.

But these are just for others. Since Qin Chen knew that there were flaws in this ban, he believed that after his research, he would not be unable to break the formation.

Thinking of this, Qin Chen immediately calmed down and studied the formation in front of him.

When a formation master breaks the ban, he must first understand the ban and then decompose it one by one, but Qin Chen did not do this because he knew that the ban in front of him was so complicated that he would not be able to do it in a short period of time if he wanted to figure it out.

What he took the lead was to attack the ban in front of him.

"Boom boom boom!"

In an instant, the entire underground ruins sounded violently again.

Every attack by Qin Chen was not arbitrary attack, but attempted again and again. After about one stick of incense, Qin Chen had a clear understanding of the entire structure of the ban.

After knowing the complexity of this ban, Qin Chen took another breath of air conditioning.

Although this ban is just an ordinary defensive ban, its complexity is much stronger than he expected.

Knowing the structure of the entire ban, Qin Chen began to consciously attack and detect the ban.

After half a stick of incense passed, Qin Chen finally found the source of energy for this forbidden.

This is because the ban itself is missing a corner and incomplete. Otherwise, it would take at least ten times more time to do this.

At this moment, Qin Chen was actually grateful to Qi Yugang for coming. If Qi Yugang had not set up the Liuhe Sacrifice and Refining Formation and accidentally broke a corner of the ban, it would have been impossible for him to find the location of the energy source of the ban.

After knowing the source of prohibited energy, everything is simple.

Half an hour later, the forbidden in front of him made a popping sound, and Qin Chen was happy. He knew that he had broken the forbidden in front of him. Although the forbidden in front of him was still intact, its energy connection had been cut off by himself and it was impossible to be activated again.

Qin Chen carefully extended to Ku Yunzhi in the forbidden system. When he picked Ku Yunzhi, Qin Chen's heart was filled with surprise.

It took so long and so much effort to finally succeed.

The purple bitter Yunzhi lies quietly in Qin Chen's hands, emitting an intoxicating atmosphere.

Just after taking a breath, Qin Chen felt like he was floating in the air, and the true power in his body was flowing wildly, as if he was about to break through.

Qin Chen no longer hesitated, took out the alchemy furnace and began to prepare for refining the bitter rhyme pill.

Although taking Kuyunzhi directly and has extremely strong effects, its efficacy will be improved to the extreme after being refined into elixirs.

After a moment, all preparations were completed, Qin Chen took a deep breath, directly sacrificed the Green Lotus Demon Fire, and began to refine it.
Chapter completed!