Their only hope was Lu Yang, but Lu Yang's cultivation was only at the mid-Human Immortal stage, far from being a match for the Xuanwu King.
Upon hearing this, everyone fell silent. They were all old, weak, and disabled, with very low cultivation levels. Apart from Lu Yang at the mid-Human Immortal stage, the only other person with any significant cultivation was Lu Tianfeng, at the mid-Divine Realm stage. He was no match for the Xuanwu King; he might not even be able to withstand a single move from the Xuanwu King. They had never witnessed the might of an Earth Immortal, but they had heard of it. With their current strength, they could only remain in Youdu Prison, clinging to life and awaiting the Xuanwu King to break through the prison and kill them all.
"All of you should leave. I am enough here in Youdu Prison. Before they can react, sneak away through the secret passage!"
Lu Yang thought for a moment and said to everyone.
"No, how can we let you stay here and die alone?"
"The only way forward is to release that demon. Perhaps he will be a match for the Xuanwu King!"
Lu Tianfeng pondered for a moment, then gritted his teeth and spoke directly.
"Are you talking about the South Sea Sword Demon?"
Upon hearing this, Old Sparrow King suddenly thought of something and immediately looked at Lu Tianfeng to ask.
"That's right, the South Sea Sword Demon!"
"When Youdu Prison was built, it was to imprison the South Sea Sword Demon. He has been trapped here for a hundred years. Although I don't know his current cultivation, every time I examine him, I feel an incredibly vast aura emanating from him!"
Lu Tianfeng continued.
"This is the only way for now!"
Old Sparrow King considered and nodded.
"Who is the South Sea Sword Demon?"
Lu Yang, unaware of the South Sea Sword Demon, changed his expression and asked softly.
"The South Sea Sword Demon was the most powerful sword master a hundred years ago. He once swept through countless experts in Huaguo alone. However, his ambition was too great; he wanted to steal Huaguo's martial arts from everyone. Eventually, several great powers intervened and suppressed the South Sea Sword Demon. But they couldn't kill him. At that time, the South Sea Sword Demon's methods were already extremely powerful. Even after being suppressed, he couldn't be killed. In the end, they could only build Youdu Prison to keep him suppressed here!"
"However, this South Sea Sword Demon is indeed a master. Even after a hundred years, he is still alive!"
Old Sparrow King explained directly to Lu Yang.
"I see. If my guess is correct, this South Sea Sword Demon's cultivation must be at the Earth Immortal level, because only with Earth Immortal cultivation can one live for such a long time!"
Lu Yang said indifferently.
"If he's at the Earth Immortal level, he'll have a fighting chance against the Xuanwu King. But no matter who wins between them, it will be a catastrophe for us, because they are both Earth Immortals. If either survives, there will be widespread suffering!"
Lu Tianfeng sighed and continued.
"We can't worry about that much now. We can only hope they both suffer heavy losses, which would be good news for us."
Flying Tiger King also said lightly.
"Yes, let's do it. I'll go see the South Sea Sword Demon!"
"I'll go too!"
Lu Tianfeng said, leading Lu Yang into a secret tunnel. The tunnel was very deep, as if it led to the earth's core.
After an hour of walking, they arrived at the secret prison. In a very large dungeon, a man was bound by eighteen iron chains. The man looked very young. Although his hair was disheveled, the aura emanating from him was incredibly powerful.
"This is the South Sea Sword Demon?"
Lu Yang looked at the man before him and said softly.
"Indeed!"
Lu Tianfeng nodded and focused his gaze on the man in the dungeon.
"South Sea Sword Demon, are you well?"
Lu Tianfeng asked the South Sea Sword Demon.
The man slowly raised his head and saw Lu Tianfeng. A cold sneer appeared on his lips.
"Little brat, why are you here again? Have you considered the deal I offered you? If you release me, I can teach you Earth Immortal cultivation techniques. I'm not lying to you!"
The man said with a smile.
"I won't believe your nonsense, but I am indeed here to release you!"
Lu Tianfeng said directly.
"What? You're really going to let me out?"
"Tell me, what are your conditions?"
Upon hearing Lu Tianfeng's words, the man's eyes instantly brightened, and he looked at Lu Tianfeng and asked directly.
"My condition is simple: kill the Xuanwu King!"
Lu Tianfeng continued.
"Xuanwu King? Who is that? Do you need me to take action? You have a Human Immortal expert beside you. Your conditions probably aren't this simple!"
The man pondered and continued to ask Lu Tianfeng.
"Your eyes are indeed sharp. You saw through Lu Yang's cultivation at a glance. That's right, he's a Human Immortal, but he's no match for the Xuanwu King. The Xuanwu King is already an expert at the Earthly Immortal realm!"
"I know that on this Earth, only you can defeat him, so I need you to act!"
Lu Tianfeng said to the man.
"Earthly Immortal?"
"How is that possible?"
"There is no such thing as an Earthly Immortal realm in this world. Even I am only at the peak of Human Immortal. How can there be an expert at the Earthly Immortal realm? I don't believe it, I don't believe it!"
Upon hearing Lu Tianfeng's words, the man roared as if he had gone mad. His voice seemed to have a penetrating quality, disrupting the minds of Lu Yang and Lu Tianfeng, forcing them to take a few steps back.
"If you don't believe it, then so be it. If you're not a match, then forget it. We'll find our own way. You should just stay here honestly!"
Lu Tianfeng sneered and prepared to leave, but the South Sea Sword Demon called out to him.
"Wait, although I'm not an Earth Immortal, I can give it a try. I don't think this Earth Immortal is necessarily my match; at most, he's a pseudo-Earth Immortal!"
The South Sea Sword Demon thought for a moment and still wanted to fight the Earth Immortal.
"Alright, swear by your soul that if you are willing to fight the Xuanwu King to the death, I will release you immediately!"
Lu Tianfeng was not a fool. He made the South Sea Sword Demon swear by his soul. Even if the South Sea Sword Demon escaped, his soul would be severely injured, making it virtually impossible for him to enter higher realms in the future. This was the power of an oath. For ordinary people, it had no binding force, but for martial arts experts like the South Sea Sword Demon, their souls could bear everything, and thus would bear oaths.
Once the mark of an oath was imprinted on the soul, it would follow them for life, until death.