"Underground..." Xunsheng's expression changed slightly, and his face became a little solemn.

Yuyao told Xunsheng what happened. Seeing Xunsheng's serious expression, Yuyao knew that he must know something.

"The Devil's Domain, you should know." Xunsheng's tone was filled with a hint of worry.

"Of course, I have had a lot of dealings with them. Could it be that the things here are related to the Devil's Realm?" Thinking of the evil spirit that was wrapped around Xunsheng at the beginning, Yu Yao understood. She didn't expect that the Devil's Realm's hand was so long that it even touched the West Sea.

"Do you know why all the elders of my mermaid tribe, except me, are in seclusion?" Xunsheng smiled bitterly: "They are all healing. We mermaids have a secret."

Xunsheng glanced at Yuyao and continued, "There is a passage at the bottom of the Endless Sea that connects to the Devil's Domain. The reason why our mermaids exist here is to guard the passage and prevent the Devil's Domain from getting involved in the West Sea. A long time ago, the Devil's Domain forcibly opened the passage. Our ancestors and elders fought against the Devil's Domain with the power of our clan, suffering heavy casualties, and finally managed to close the passage. The passage is located on the bottom of the sea near the dungeon."

“Logically speaking, my clan elders and I would have noticed the abnormality in the passage, but we didn’t notice it at all. There must be something wrong here.” Xunsheng said with a bad premonition in his heart.

"Does Qiu know about this?"

"She has experienced the task of guarding the passage, but she doesn't know the exact location of the passage," Xunsheng replied.

"At that time, she hadn't been possessed by another body, so she didn't know about it. But recently Fu Li said that he had told Qiu about this matter, but Qiu didn't respond. This shows that the person who has possessed another body is very likely related to the Devil's Domain, or may be a member of your mermaid tribe." Yu Yao analyzed.

"I also suspect that we are one of our own, otherwise it would be difficult for us to disguise ourselves so well." Xunsheng agreed: "I will go to that place to investigate."

"I'll go too." Yu Jue walked out from the inner room. Yu Yao used some means to hide his aura.

After using Yuyao's elixir and the mermaids' own healing ability, Yujue's complexion improved a lot after a night of recuperation. At this time, he turned into a human form, changed into low-key but high-quality clothes, and his upright and strong figure, curly blond short hair, and impeccable facial features were really eye-catching.

"Don't you know your own situation? The responsibility on your shoulders does not allow you to make any mistakes." Xunsheng interrupted Yujue.

"I want to go because I know the responsibility on my shoulders! Only the royal bloodline of the mermaid clan can suppress it. Otherwise, our royal family would not have declined to this extent after that time!" Yu Jue said in a firm tone.

"With your current physical condition, you will only be a hindrance if you go." Yu Yao stated the cold fact calmly.

Yu Jue was choked with speech.

"And you, can't go either. Qiu has been keeping a close eye on you lately. If you go, it will make too much noise." Yu Yao said.

"Isn't she keeping a close eye on you?" Xunsheng retorted.

"When has she ever targeted me? She is probably used to it, and I am a human. She doesn't know my background and strength. She just thinks I am from the Tuoba family and have some connection with you. She doesn't take me seriously. But you are different. As an elder of the mermaid tribe, you are the one she fears the most at the moment. Besides, Yu Jue just disappeared, and she is suspicious of you." Yu Yao made a series of analyses, leaving the two mermaids speechless.

Yu Yao avoided the patrolling fish, walked to a secluded place, and said, "Come out."

Yu Jue appeared from the side somewhat awkwardly.

"This is my territory after all, and it would be convenient to have someone familiar lead the way." Yu Jue explained.

"Take this pill." Yu Yao threw a pill to Yu Jue, and then reluctantly added a few defensive talismans and concealment talismans on him.

"How much you look down on me." Yu Jue laughed.

"Although you are the future king of the mermaids, you are still seriously injured and have just reached adulthood. Strictly speaking, you are just a bigger kid. Listen to my instructions and don't act on your own." Yu Yao warned and walked forward.

Yu Jue showed a beautiful smile behind her. She really didn’t know much about the mermaids.

"Not over there, that's the North Dungeon."

"Huh? You mermaids have so many dungeons?"

"There are so many sea beasts in the West Sea, and there are also many fierce beasts."

Under Yu Jue's leadership, the two reached their destination through a hidden path.

"There is a barrier here." The two hid in the water plants not far away, looking at the guards who were standing guard seriously.

"I can't sense it." Yu Yao frowned.

"This is something only I can sense because of my blood. The ones who cast the barrier must be the mermaids." Yu Jue's short hair fluttered, his profile was clearly defined, and his facial features were deep.

"Let's go in and take a look." Yu Yao took out a magic talisman and activated it, then walked in with Yu Jue in a swagger. Of course, the two of them took disguise pills and disguised themselves.

“These talismans of yours are all at the peak grandmaster level, and the formation you set up on me is also at the peak grandmaster level!” Yu Jue said. If it weren’t for the blessing of these high-level things, how could it be hidden from that impostor.

"So, we humans are awesome. You mermaids should get involved with us. Not all humans are weak."

"We don't like humans because they are bad, not because they are weak." Yu Jue blurted out, and then he thought of Yu Yao as a human, so he immediately made up for it: "Of course there are exceptions like you."

Yuyao didn't answer, her expression remained calm, she made a gesture to keep quiet, pulled Yujue over, jumped up, and stuck to the top of the dungeon. Yujue's face looked a little unnatural, at this time he was very close to Yuyao, he could even smell her fragrance.

At the same time, a guard came out of the cell nearby and walked towards the door.

After the guards left, the two jumped down. The cell was interconnected, winding, dark and deep.

"Strange, why are there so few guards here?" Yu Jue remembered that it was not like this before.

"The fewer people there are in a problematic place, the better. Have you forgotten where you were imprisoned?" Yu Yao said as she walked inside. The aura she released told her that there were no other guards around, but there were many sea beasts imprisoned in the cell.

The two continued to walk inside, "It should be here." Yu Yao recalled what Fu Li said.

Yu Yao opened the door lock with ease, and the cell was empty at a glance.

Yu Jue knelt on one knee with one palm placed on the ground, feeling the movement underneath, and Yu Yao did the same.

At first, the two did not notice anything unusual, but suddenly a slight vibration was transmitted through the ground to their palms.