Mental Barrier

"Fly. Free Portal. Hidan?"

"Uchiha Clan, you even know about my crazy younger brother?"

Upon hearing Uchiha Yue's question, Feilian looked incredulous, clearly alarmed by the source of Uchiha Yue's information.

Then, recalling Uchiha Yue's cruel methods, before Uchiha Yue could even ask, Feilian slowly said to him, "That's right, the demon of the Uchiha Yue Uchiha Clan, the Hidan you speak of, is my younger brother. However, my relationship with my brother Hidan is not good at all; that guy Hidan has always been a madman! But one thing I'm certain of is that Hidan's status is far higher than mine! Presumably, his current strength has completely surpassed mine!"

"Is Hidan really that strong?"

As soon as Feilian finished speaking, Uchiha Yue frowned slightly and analyzed Hidan's strength in the original story again in his mind.

However, no matter how Uchiha Yue analyzed Hidan's strength, he still couldn't quite believe that Hidan's strength could surpass Feilian's.

It's important to understand that even though Uchiha Yue hadn't fought Hidan directly in the original story, after sparring with Feilian, he already sensed that Feilian's strength far surpassed Hidan's. Feilian aside their unique abilities, Feilian's mastery of Taijutsu and swordsmanship alone was unmatched by Hidan. Therefore, when Uchiha Yue heard from Feilian that Hidan's strength might even surpass his own, he couldn't help but silently remind himself not to always use the strength depicted in the original story to infer the strength of characters in his own world.

After all, the world Uchiha Yue is currently in may very well no longer be the ninja world depicted in the original story.

Then, Uchiha Yue obtained some more information about Hidan from Feilian and stopped talking to Feilian. However, Feilian kept bothering Uchiha Yue, clearly trying to escape. Unfortunately, Uchiha Yue had no intention of letting Feilian go in the first place. So, listening to Feilian's incessant chatter, Uchiha Yue simply destroyed Feilian's upper body and knocked Feilian unconscious.

With this, Uchiha Yue was finally able to have some peace and quiet for a while.

Then, Uchiha Yue looked at the severed head of Feilian before him and thought to himself:

"Since I can't join the Underground Exchange right now, I'll just stay here and study Feilian's body properly!"

"Feilian's two special abilities, immortality and immunity to Genjutsu, are both extremely powerful special abilities."

"If I can figure out the principles behind these two special abilities, my strength will be elevated to another level."

"Now, let's examine Feilian's body first!"

Thinking this through silently, Uchiha Yue looked at the headless Feilian in front of him and used his Purple Eye to perceive the mysteries of Feilian's body.

However, no matter how much Uchiha Yue his Purple Eye Insight, he could only see that Feilian's body structure was no different from that of an ordinary person. If there was any difference, it would only be that Feilian's physical strength was much higher than that of an ordinary person. But if Feilian's physical strength was compared to Uchiha Yue's, then Uchiha Yue's physical strength was actually a notch above. As a result, Uchiha Yue was completely clueless about how to study the principle behind Feilian's immortality.

Then, after spending three full hours researching, Uchiha Yue still couldn't make any progress. Ultimately, he could only categorize Feilian's immortality as either Kekkei Genkai or a secret technique. Immediately, Uchiha Yue decided to temporarily abandon his research on Feilian's immortality and instead focus on his immunity to Genjutsu Feilian. Clearly, of Feilian's two special abilities, Uchiha Yue favored Genjutsu immunity over his immortality.

Immediately afterwards...

When Uchiha Yue was preparing to study Feilian's ability to resist Genjutsu, he first used Uzumaki Clan Secret Technique to restore his own mental energy. Then, after Uchiha Yue had fully restored his mental energy using the Uchiha Yue Uzumaki Clan Secret Technique, he prepared to use his own mental energy to invade Feilian's mental energy.

But...

To Uchiha Yue's utter surprise, his attempt to invade Feilian's mental space with his spiritual energy encountered tremendous resistance.

The obstacle was like an invisible mental barrier in front of Feilian's mental space!

"Could that mental barrier be the principle behind Feilian's immunity to Genjutsu?"

Using his spiritual energy to sense the invisible spiritual barrier, Uchiha Yue slightly narrowed his eyes, increasing the input of his spiritual energy. However, no matter how much spiritual energy Uchiha Yue output, it was blocked by the spiritual barrier within Feilian's body. Moreover, as Uchiha Yue continuously consumed his own spiritual energy, preparing to invade Feilian's spiritual space, Uchiha Yue discovered that the spiritual barrier in front of Feilian's spiritual space used a different kind of spiritual energy than Feilian's!

"Could it be..."

"Could it be that Feilian's ability to possess both immortality and immunity to Genjutsu is truly due to his belief in Jashin god?"

"The spiritual energy that forms the spiritual barrier is completely different from Feilian's spiritual energy!"

"Could it be that the spiritual energy that forms the spiritual barrier is the spiritual energy of that so-called Jashin?"

"Feilian has so many secrets!"

With a helpless deep breath, Uchiha Yue ultimately failed to break through that mental barrier and invade Feilian's mental space.

However, even though Uchiha Yue didn't manage to infiltrate Feilian's mental space, he still learned the principle behind Feilian's immunity to Genjutsu while studying that mental barrier. Undoubtedly, Feilian relied on the mental barrier outside his own mental space to become immune to the Genjutsu used by Uchiha Yue. Therefore, as long as Uchiha Yue could use his own mental energy to form a mental barrier outside his own mental space, he could also become immune to Genjutsu cast by others.

However, the mental barrier formed by Uchiha Yue using his own spiritual energy is definitely not comparable to the mental barrier within Feilian's body.

However, Uchiha Yue wasn't too greedy. In his view, as long as he could figure out the principle of Genjutsu immunity, it would be something to be happy about.

As for truly possessing the ability to be immune to Genjutsu, that also takes a lot of time.

Therefore, after Uchiha Yue realized this, he put aside the matter of Genjutsu immunity and prepared to study how to construct a mental barrier.

"If I can figure out how to form a mental barrier, I'll be able to master even more ways to use mental energy!"

"Feilian! Feilian!"

"I'm so glad I met an opponent like you!" (Bichon tip: How to quickly find the book you're looking for)

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