Chapter 508: Secrets of the Boundary Sea

"Tell me what you know about the Boundary Sea." Gu Yuan did not linger on the question.

Tu heard this and let out a slight sigh of relief.

What he feared most was the master asking questions he could not answer, which would make him seem worthless.

He gathered his thoughts and respectfully said, "Answering you, Master, the Boundary Sea is vast and boundless, formed from countless shattered world remnants and chaotic currents; there is no fixed order there, and the sole law is the survival of the fittest."

"The beings in the Boundary Sea can be roughly divided into three categories."

"The first type are wanderers like Zui Nu. Most of us fled into the Boundary Sea to survive after our homes were destroyed or we offended powerful enemies."

Our strengths vary, ranging from True Immortal Peaks to Giant Immortal Kings; we fight each other daily, and for a tiny fragment of world containing the primal source we battle to the death.

"The second type are the native peoples of the Boundary Sea. Born from chaos, they possess powerful bodies and bizarre divine abilities, such as Chaos Beasts, Void Worms, World‑devouring Demon Chapters, and so on. They lack sentience, following only a primal devouring instinct, making them the most dangerous hunters in the Boundary Sea."

Gu Yuan listened quietly; all this information was entirely new to him.

Seeing Gu Yuan did not interrupt, Tu continued, "The third type, also the most powerful beings in the Boundary Sea, we call them—Lord of the Forbidden Zone."

"Lord of the Forbidden Zone?"

"Yes, Master." A deep dread flashed in Tu's eyes. "Within the Boundary Sea there are regions shrouded by a pollution so dense it cannot be broken; even Jue Dian Immortal King dares not tread them lightly. We call those areas Forbidden Zones."

"In each Forbidden Zone lies a terrifying presence beyond imagination. No one knows who they are or where they come from; they seem to have existed since the birth of the Boundary Sea."

"They rarely appear, but each emergence stirs a storm of blood and gore across the Boundary Sea. Zui Nu once saw them from afar: a blood‑colored mist spreading for billions of miles, and wherever it passed, all world remnants and all beings—whether wanderers or native beasts—were instantly assimilated into that blood mist…"

Pollution.

More pollution.

Gu Yuan recalled the Immortal Emperor's final warning.

It seems this so‑called pollution is the true ultimate threat to all heavens and realms.

"You said earlier you came from the Unified Realm?" Gu Yuan changed the question.

"Yes, Master."

When his hometown was mentioned, Tu's face showed a complex expression—nostalgia, pain, and deep‑seated hatred.

"The Unified Realm is a very special world; Zui Nu is a Fourth Realm Immortal, equivalent to the Jue Dian Immortal King here. Above us are five supreme Fifth Realm 'Eternals.'"

"Those five Eternals jointly rule the Unified Realm; they are immensely powerful, their words command law. I once thought they were the strongest beings in existence. Until… I came here and met the Master and the Ancestor…"

Those words truly came from the heart.

In the brief time he spent on the Gu Family Divine Island, what he saw and heard completely overturned the worldview he had built over hundreds of thousands of years.

Hong Meng Dao Qi was drunk like water, Immortal King Dao Fruit like candy, Giant Immortal Artifacts and Immortal Emperor fragments were given as gifts.

Even the combined effort of those five Eternals from the Unified Realm could not produce such a feat.

Gu Yuan neither accepted nor rejected his flattery.

"Tell me about your grudge against the Unified Realm."

"Yes."

A poisonous resentment flashed in Tu's eyes. "Zui Nu once challenged the Fifth Realm, but at the crucial moment, people conspired against him. Those three each had the shadow of an Eternal behind them. They… did not want the birth of a Sixth Eternal, which would dilute their authority."

Gu Yuan understood.

This is the most common power‑struggle trope, no matter the world.

"The three's names, factions, and weaknesses," Gu Yuan asked calmly.

Tu's spirit lifted at the words.

The Master… is interested in his own old grievance?

He dared not conceal anything, and immediately relayed every piece of information on those three adversaries—their cultivation techniques, treasure abilities, personality flaws, even obscure secrets—in exhaustive detail.

An hour later.

Tu exited the secret chamber.

He felt considerably lighter, as if the massive stone that had weighed on his heart for hundreds of thousands of years had been shifted aside.

Although the Master gave no promises, a spark of hope ignited in Tu's heart.

Given the Master's manner, once he asks, he will not act without purpose.

Perhaps, one day, he will truly witness the five great Eternals of the Unified Realm trembling beneath that Ancestor's Chaotic Immortal Bell.

Inside the secret chamber, only Gu Yuan remained.

He ran through the information Tu provided in his mind.

Boundary Sea, Forbidden Zones, pollution, Unified Realm…

This universe is far more complex than he imagined.

Gu Yuan recalled the Immortal Emperor's final reminder.

"Besides oneself, it is best to trust no one, and certainly not rely excessively on… external forces."

That "external force" likely refers to the system and whatever lies behind it.

"It's getting more interesting."

Gu Yuan muttered a line to himself, then temporarily cast those stray thoughts aside.

One must eat a meal bite by bite, and walk the road step by step.

He now has more important matters to attend to.

He stood, a thought flickering, and his whole being vanished from the secret chamber.

In the next instant, he found himself in his inner world.

The inner world at this moment had expanded severalfold beyond before.

The three lower tiers of the Hall of Sending Heaven had been completely devoured and merged by the World Tree's roots, becoming part of the inner world.

Countless celestial palaces and divine temples floated amid the sea of clouds, exuding an ancient, time‑worn aura.

And at the center of the entire inner world lay a vast continent shrouded in dark crimson light.

The Blood Moon Netherworld has, at this moment, completely changed its appearance.

Above the Heavenly Dome, that scarlet Blood Moon has been fully purified by the power of the Merit Golden Wheel, reverting to a bright silver color that radiates a gentle lunar essence.

On the earth, the skeletons melt away, the resentment dissipates, and under the nourishment of the World Tree's life source, fresh green shoots begin to sprout from the charred soil.

Gu Yuan's figure appears in the sky above the Blood Moon Netherworld.

He can feel that the Heavenly Dao of this world has been fully assimilated by his own 【Heaven-Receiving Vein】, becoming part of his Divine Kingdom's Great Way.