The four gates of the southeast, northwest, and northwest of the Ghost Domain City were inspected by people from the underworld with soul seal mirrors, and after Ning Xin and Song Weizi saw it, their faces were very ugly!

One of the two of them has no imprint on his body, and the other has been branded with the imprint of the underworld, and both of them are still the targets of the underworld, once they are illuminated by the soul imprint mirror, no one can escape!

"It seems that the city lord of Ghost Domain City doesn't want you to enter the city very much!" Ning Xin looked at the transparent black light curtain that suddenly rose above Ghost Domain City, and said slowly.

"Hmph, Baili Mingzhuo wishes I could enter the Ghost Domain City, so that he can arrest me as soon as possible! Those ghost errands should be the meaning of the Arctic Yin Emperor, Baili Mingzhuo can't catch me every time, he feels faceless!" Song Weizi said with a sneer.

Now he is like a thorn in his throat to Baili Mingzhuo, maybe he is the one who wants him to die quickly now!

"What should we do now? Seeing that their posture won't stop for a while, let's just wait?" Ning Xin frowned and looked at the people of the underworld and the black cavalry guards at the city gate, they were now entering the city to throw themselves into the net!

"If the city protection array is not opened, I still have a way to enter the city without passing through the city gate!" Song Weizi also said with some sorrow. He also wanted to enter the Ghost Domain City as soon as possible and help Mu Ningxin get the Void Map, so he could leave with Wanying as soon as possible.

In order to save him before, Wan Ying not only opened the city protection array, but also kidnapped Baili Yingzhuo, if this matter was known to the Arctic Yin Emperor, she would definitely be punished!

Just when the two of them were a little depressed, suddenly a huge divine sense hurriedly glanced over!

"Let's go!" Ning Xin said quickly, and immediately left in a hurry with Song Weizi, flying towards the valley where they were temporarily sheltered!

"Do you feel that the divine sense just now is a little familiar?" Song Weizi asked.

"It's bloodkill! I haven't seen him for hundreds of years, and his strength is really growing rapidly!" Ning Xin said lightly.

When she was in the Blood Sea Hell, it was Blood Tu who noticed her every time, but now she and Song Weizi had only stayed around the city wall for a short time, and his divine sense had probed it, which showed that his strength had improved a lot!

"It turned out to be him!" Seeing Ning Xin say blood killing so indifferently and affirmatively, Song Weizi's eyes flickered, "He found us?"

"Shouldn't be! But when we come to the gate of the Ghost Domain City in the future, we have to be careful! This time, almost all of the ghost missions he brought with him are above the merger period, plus the people of the Black Horse Guard, it is not easy to get out if they are discovered!"

"Yes!"

"By the way, do you know the captain of the Black Cavalry Guard?"

"I don't know much! I only know that his name is Baili Cong, when I first met Baili Mingzhuo, there was no such person by his side!

"It's nothing, I just feel that he has an indescribable sense of disobedience!" Ning Xin remembered that when she first saw Baili Cong at the city gate, she found that he seemed to have reduced his cultivation and soul power strength.

If she guessed correctly, he should be a Mahayana monk, not a merger monk as he appears!

"Do you know, is there any elixir in the underworld that can change the soul power of a monk?" Bai Li Cong is the third monk she has met in the underworld who can change her soul power!

"Yes, there is, but it's extremely rare! I've only heard of such an elixir, called the Hidden Soul Pill, it is said that different grades of the Hidden Soul Pill can hide the soul power of monks to different degrees! But I have never seen this elixir with my own eyes!" Song Weizi looked at Ning Xin with some puzzlement, and she didn't know why she asked about this.

Although many monks will hide some of their own strength when they walk outside, they will only reduce some of their cultivation, and few will even reduce their soul power, of course, they are not capable of doing it!

"I'm just a little curious!" Looking at Song Weizi, who was looking at him suspiciously, Ning Xin explained slightly, the Hidden Soul Pill She knew that this kind of pill was recorded in the Soul Elixir Pill prescription that Bai Nizun got from her.

Now Ning Xin's real wonder in her heart is why she can see through Baili Cong's hidden soul power at a glance this time, whether it is Ming Lao or Qiao Chen before, she knows that they have hidden soul power, and she only found out after they showed their strength.

After that, for a month, Ning Xin and Song Weizi didn't find a way to enter the Ghost Domain City, and those ghosts seemed to be stationed at the city gate, and they had to strictly inspect the cultivation in and out of the city every day!

"I've figured out a way to get in!" Looking at the ghost beast car in his sight that was leisurely flying towards the city gate, Song Weizi's eyes lit up.

"What's the solution?"

"Did you see the ghost beast car in the sky? The Black Rider Escort and the people of the underworld will not shine the car with the soul mark mirror, so we will hide in the car when the time comes!"

"The owner of the Ghost Beast Car will help us?"

"Of course not. Saying that, Song Weizi handed a jade slip to Ning Xin.

"What is this?" Ning Xin glanced at Song Weizi suspiciously, and then opened the jade slip, "Soul Transformation Technique!"

"This is a secret technique passed down to me by my ancestors, and after learning it, I can change the size and type of my body at will!"

"There is actually a secret technique in this world that can change the soul body?" Ning Xin said with some surprise!

"Of course, I'll show you right away!"

Saying that, Song Weizi shrank to the size of his thumb at a speed visible to the naked eye, and then saw him quickly rotate his body, and it turned into a thumb-sized soft black worm! Looking at the black soft worm on the ground, Ning Xin couldn't come back to his senses for a long time!

When Song Weizi came back, he found that Ning Xin still looked incredulous, so he said with a smile, "The world is so big, you will get used to it if you see more in the future!"

"Wait a minute, let me digest it!" Ning Xin stopped Song Weizi who was still about to say something, she was shocked not because Song Weizi had turned into a black bug, but because she was able to see Song Weizi inside through the body of the black worm!

"After you transform, will others be able to spot you?" Ning Xin asked anxiously.

"Of course not, unless his soul power strength is two levels higher than mine!"

"Oh!" Song Weizi's affirmative answer made Ning Xin sure of one thing, her eyes now seemed to be able to see the essence of a person's soul!

"Don't be in a daze! Hurry up and learn this secret technique, so that we can enter the ghost domain city! But for the sake of insurance, we have to choose a ghost beast car with a relatively high status monk to sit on, so that it can be foolproof!"

"Isn't this a secret technique passed down to you by your ancestors?

"Hehe" Song Weizi smiled a little lonely, "Don't worry, when I was deposed and sent to the eighteenth layer of hell, they broke off their relationship with me!"

Glancing at the ghost cha holding the soul seal mirror at the gate of the city, Ning Xin struggled a little in her heart, this secret technique knew that it was more precious at a glance, and she didn't want to owe Song Weizi!

"You don't have to think too much!" Looking at Ning Xin, who looked a little hesitant, Song Weizi said, "You have saved me several times, and I haven't thanked you properly, this secret technique is my thank you!"

"Since you said so, then I'm disrespectful!" Ning Xin was not hypocritical, and directly began to study, after the big deal, she tried her best to help him take that Xia Wanying out of the City Lord's Mansion!