Xukong's words were enough to Alarm Lin Mu.
Lin Mu had see plenty of Unorthodox Technique and even had a few memorized. Despite that, he knew better than to use one. Orthodox techniques were those approved by almost all paths and the unorthodox ones were the opposite of that.
"What is a Caustic Nether Spring, Senior?" Lin Mu questioned. "Why is a technique like that forbidden?"
"The Nether Vitriolic Baptism is a Body cultivation technique that utilizes one's entire potential while levying the external powers." Xukong spoke. "But that isn't why it is forbidden." Xukong added.
"Then why senior?" Lin Mu questioned.
"The Nether Vitriolic Baptism Is a body cultivation technique that is not of this world." Xukong spoke. "Or rather, it doesn't belong to any of the normal immortal worlds." He stated.
"Not of this world?" Lin Mu was stunned.
"Yes…" Xiong confirmed.
"Then can you tell me why is the Nether Vitriolic Baptism consider as a body cultivation technique senior?" Lin Mu questioned. "And that too an unorthodox one on top of that." Lin Mu added.
"That is because to cultivate the Nether Vitriolic Baptism technique, one needs caustic Nether spring. And that is not something that is easily found." Xukong stated.
"Among the many people here, I doubt even a fraction have heard of it." Xukong added.
"What makes a Caustic Nether Spring special, senior?" Lin Mu asked.
"A Caustic nether Spring is a type of a natural energy spring only found in a minor amount of worlds. The reason why it is so rare is the fact that its is sourced from the nether worlds." Xukong revealed.
"Nether world?" Lin Mu was tunned.
While he did know of the nether world, his understanding was limited to the memoirs of the lost immortals and the other legends.
"A Caustic Nether Spring is a very toxic energy spring that can melt down a majority of things in the world."
First of all, a Caustic Nether spring is born from the Nether world itself." Xukong spoke.
"The nether world? What's that?" Lin Mu inquired.
"Just like there is the mortal world and the immortal world… there is the Nether world. It is the place where most of the life comes to an end." Xukong replied.
"Life come's to an end? Then why can there be life there? It doesn't make sense? Lin Mu questioned next.
"It is simply too far complex to answer. There are too many aspects to this."Xukong answered.
"What is the Caustic Nether Spring then, Senior?" Lin Mu inquired.
"A Caustic Nether Spring is a special spring of energy that directly links up with the nether world. Just like the mortal and immortal world, the Nether world is another dimension.
This world can directly link up with the power of the nether world and strengthening an individual.
The reason why it is forbidding and considered Unorthodox is the same too. Many that cultivate this technique end up becoming individuals that are far too dangerous. There was no lack of mad men who killed leagues of immortals to establish their presence." Xukong explained.
His words were bought to warn Lin Mu.
Though it still left him wondering about the reason why,
"Why though, senior? What is this Caustic nether Spring?" he questioned.
"Like I said, The Caustic Nether Spring is a form of energy spring that only forms in a few worlds. And those that it does in are great worlds. The minimum requirement for a bond such as this to form is none other than a cross dimensional world link." Xukong answered.
Xukong could see that Lin Mu was still quite confused and explained further.
"Let's just say that the Caustic nether Spring can only be formed in worlds with a significant link to the Nether world," Xukong spoke up.
"Does the nether world really exist, senior?" Lin Mu questioned.
"It does indeed." Xukong nodded his head. "And there is a lot more to it, too. You will learn that eventually." He answered.
Lin Mu couldn't help but marvel at the existence of an entirely new world. He had heard about the Nether world a lot of times before. Not just in the memoirs of the Lost immortal but also the normal stories of his own Xiaofan world.
But despite that all, he had never learned much about it in detail.
Lin Mu pondered about it for a few minutes before figuring out a question.
"Why is this technique considered as a forbidden one, Senior?" Lin Mu questioned.
"The answer is simple. This body cultivation technique stems from a great body cultivation immortal who belonged to the unorthodox. He directly relied on death and despair of the many lives." Xukong replied, making Lin Mu confused.
"The technique is something that directly taps into the power of death of all life." Xukong contented before creating an illusion.
Lin Mu felt the illusion take form in front of him and started to learn.
"The Caustic Nether Spiring is water that is nurtured directly by the nether world. All those that can withstand it are considered as the beloved of those worlds," Xukong continued.
"This technique was made by a long lost immortal and was meant to be a final gambit for Unorthodox worlds." Xukong dressed.
"Then why did you tell me this was a worthy technique, Senior?" Lin Mu questioned.
"Like I said originally. It really is a great technique. Its potential is limited by the Caustic Nether spring. But other than that, one can cultivate to a great point." Xukong answered.
Lin Mu finally felt that he had great prospects at cultivation.
"So I can't use the third technique at all." Lin Mu mutter.
"Yes." Xukong confirmed. "Though you have a lot more to learn." He added.
"Like what senior?" Lin Mu asked,
"The Haima Tribe. Do you truly know what they are?" Xukong questioned.
"No… though I do know that they are very strong. And also the fact that they seemingly have a very high affinity to the water element." Lin Mu answered in detail;.
"This is all true." Xukong replied. But you fail to recognize the most obvious source." Xukong answered.
"The most obvious source?" Lin Mu was befuddled.
"Yes…" Xukong nodded his head internally. "Have you not seen the place they are in?" Xukong asked.
"Wait… you don't mean this place? And the beast in front of us?" Lin Mu questioned.
"Exactly." Xukong confirmed. "The beast you see in front of you is a Great Ocean Hippocampus."
"And how are they linked with the Haima tribe?" Lin Mu was sure Xukong wouldn't lie to him.
"Well… the understanding I have is that the Haima Tribe and the Great Ocean Hippopotamus are the same. Or more accurately, their bloodline is the same." Xukong's words shook Lin Mu.
This was something that even Lin Mu had guessed, but never actually dared to confirm. But now that Xukong himself had confirmed it all, there was no reason for Lin Mu to doubt it.
"Wait, a minute…" Lin Mu recalled some of the old memories. "Doesn't this mean that… the Haima tribe is…" Lin Mu didn't dare to confirm right away.
Instead, he called for several of the experts.
Elder Niji and Warrior Kulo were the first to appear, along with many others.
"What is the issue, Senior?" Elder Niji asked.
He had been called in between the finalizing of his work.
"I hope I didn't disturb you, Elder Niji." Lin Mu stated with a straight face.
"Of course not. While I did find some unique things, none of them are worth your time." Elder Niji stated plainly.
The convicts and humans that heard this were rather stunned and pondered on.
"I have something important to state." Lin Mu spoke up.
"And what is that, Noble Lin Mu?" Elder Niji questioned.
"The Dao treading realm… what is the Dao Embryo you practice?" Lin Mu asked but then realized that it might not be foully appropriate. "I'll start in a different way." Lin Mu answered. "Tell me… is your legacy established?" he asked.
Elder Niji stayed silent for a bit figuring out what Lin Mu meant. But finally he was able to answer his question.
"The Dao Treading realm for the Haima tribe is indeed different. It allows one to become an immortal or expert while having dominion over several elements. This is even if one managed to witness them fully.
"But despite this, I can say for sure that the Dao Treading realm allows the Haima tribe to form its own Dao Embryo. For us, this is none other than the Tide Scale Embryo." Elder Niji answered.
"No wonder." Lin Mu replied and gazed at the scene.
Elder Niji could feel several streams of information rushing into his mind. It was something he had never experienced before but he could tell that all the information was profound.
"Elder Niji… The beast that is front of you." Lin Mu declared. "It is something your bloodline knows." Lin Mu sated.
Elder Niji didn't want to believe it at first, but now he had no option.