You don't want your secret to be revealed by others, right?

"Such strong malignant energy!"

Lin Yue frowned slightly, not expecting the Divine Beast Dream Snake to harbor such astonishing malignant energy.

Moreover, there was no vengeful spirit, just pure malignant energy.

"Be careful, senior brother."

Zuo Tianchui frowned, waved his sleeve, and his Inner Heaven and Earth Domain immediately spread out, blocking this surge of malignant energy.

If this astonishing malignant energy were allowed to spread freely, the soldiers of the Dawn Army would probably not be able to withstand it.

"This malignant energy?"

Zuo Tianchui closed his eyes to sense it carefully, then frowned, saying, "How could the Inner Heaven and Earth of the Divine Beast Dream Snake have such astonishing malignant energy?"

"This malignant energy is quite pure, without any sentient thought. It should be innate malignant energy."

Lin Yue nodded gently.

"Huh?" Zuo Tianchui glanced at Lin Yue in surprise, saying, "You're not affected, senior brother?"

He initially thought this senior brother couldn't withstand the impact of the malignant energy, at least experiencing some disturbance in his mind, but unexpectedly, there was no reaction at all?

It seemed this senior brother's Dao Heart was even stronger than he had imagined.

"What's going on inside this Dream Snake?" Lin Yue asked.

"I don't know." Zuo Tianchui shook his head slightly and said, "But if the mere leaked malignant energy is so astonishing, the deeper malignant energy is likely even more so. Are you sure you still want to go in, senior brother?"

"What level of Dao Heart would be needed to resist it?" Lin Yue asked.

"Sacred Heart."

Zuo Tianchui said, "It needs to be at the Sacred Heart level to withstand this malignant energy, and how long you can resist it also depends on your mind."

"Oh?" Lin Yue smiled and said, "Then I'll trouble the Left Governor, as I might stay inside for a while to use this opportunity to temper my mind."

"You have already attained the Sacred Heart, senior brother?" Zuo Tianchui asked in surprise.

"Yes." Lin Yue nodded slightly, "I also ask the Left Governor to keep it a secret."

"Having attained the Sacred Heart, you still haven't Harmonized into a Saint..." Zuo Tianchui couldn't help but shake his head in admiration.

He didn't need to think to know this senior brother was undoubtedly trying to master more rudimentary forms of the Dao, for once Harmonization was achieved, there was no turning back.

"Alright then, since your Sacred Heart is already formed, I won't stop you, senior brother."

Zuo Tianchui said, "The source of the malignant energy in the Dream Snake's Inner Heaven and Earth is unknown, but it does have a tempering effect on your Dao Heart. However, you must still be careful."

"Don't worry."

Lin Yue nodded slightly and asked, "Don't you need it?"

"I achieved the Sacred Heart centuries ago; the deepest malignant energy has little effect on me." Zuo Tianchui shook his head slightly.

Lin Yue said no more, immediately flying into the giant mouth of the Dream Snake's corpse.

Malignant energy assaulted him, growing more intense, shaking his spirit.

Space transformed, and heaven and earth twisted.

In a daze, Lin Yue had already flown into the Dream Snake's Inner Heaven and Earth, surrounded by a vague, illusory scene like a dream, difficult to discern, and with tangible black malignant energy drifting and spreading.

"This malignant energy... is indeed strong."

Lin Yue felt this astonishing malignant energy and instead revealed a hint of a smile.

He feared the malignant energy wasn't strong enough to pose any pressure or temper his mind, making the Dao Heart have no room for improvement.

What he needed now was tempering of the Dao Heart, which was more important than obtaining any Divine Beast Essence.

"It's a good opportunity to test my newly improved Three Thousand Hells Primordial Spirit Method."

Lin Yue started moving toward the depth of the Inner Heaven and Earth while operating the Three Thousand Hells Primordial Spirit Method under the assault of the malignant energy.

The Three Thousand Hell Body, at the Four Symbols Heaven Barrier stage, could temper a Perfect physical body comparable to the Supreme Secret Technique of the Demon Clan.

At the Three Talents Heaven Barrier stage, the physical body was already perfect, with no more room for improvement, so the tempering focused on the Primordial Spirit, using the pain within the Primordial Spirit to enhance Dao Heart Will.

However, the pain born within the Primordial Spirit had its limits, as the Primordial Spirit couldn't produce pain that would cause its own collapse.

This Primordial Spirit Cultivation Method's limit stopped there.

However, over the years, during his travels in the Human World, Lin Yue attempted to improve the Three Thousand Hells Primordial Spirit Method by extending it.

Simply put...

It was about refining the pain born within the Primordial Spirit to improving the Dao Heart through external influences on the Primordial Spirit.

External pressure was indeed something that could be found.

Originally, he planned to collect various external influences affecting the Primordial Spirit, like the Poison of Heart, also as preparation for the Twelfth Prince.

The malignant energy within the Dream Snake's body proved to be more effective.

"The deeper you go, the stronger the malignant energy? Just as well, let's see my current limit."

Lin Yue pondered as he operated the Primordial Spirit Cultivation Method, using the malignant energy to stimulate the Primordial Spirit, thus tempering the Dao Heart while heading toward the region with more intense malignant energy.

As he delved deeper into this dreamlike small domain, the malignant energy also became increasingly strong.

Unknowingly, when the deeper malignancy ahead faintly revealed a glow, he halted his steps.

"This is the limit."

Lin Yue frowned, enduring the pain seeping from his Primordial Spirit, and sat where he was.

Any further, he wouldn't be able to bear it.

"If I didn't operate the Primordial Spirit Cultivation Method, I could go further, but it wouldn't be meaningful."

Lin Yue observed the glow within the malignancy from afar, "What is that? An essence? Or something else?"

He was not in a hurry, sitting cross-legged where he was, beginning to silently temper his Dao Heart.

At the level of the Sacred Heart, wanting to make slight progress was very difficult.

After becoming a Saint, the strength of the Dao Heart also determined one's longevity.

With such a rare opportunity for tempering the Dao Heart, he wouldn't miss this chance.

Stimulating the Primordial Spirit essentially meant harming it, although the damage was subtle, over time, it could evolve into serious injury.