Twenty Thousand Years

In the Heavenly River Dimension, the vast river waters surged without end.

Lin Yuan sat cross-legged, comprehending the operation of the Heavenly River Dimension's source great dao.

Threads of special substance drifted and intertwined before him.

It was precisely the Undying Substance of the Third Source World.

Of course, the Undying Substance condensed before Lin Yuan.

It did not come directly from the Third Source World, but had been recreated after he had thoroughly understood the essence of Undying Substance.

He had replicated and manifested it with his own power.

Astonishment filled Lin Yuan's eyes. Even though he had already comprehended it for ten years,

he still marveled deeply at this special substance.

And even within the Heavenly River Dimension, Undying Substance could still exist stably.

One had to know that many power systems, treasures, and rare wonders could only endure within their corresponding dimension or a similar dimension.

Once they left it, they would collapse.

After losing the environment that nurtured their existence, most lifeforms or non-lifeforms would be affected.

Even one as powerful as a Time Lifeform would be more or less suppressed if trapped deep within some special Dimensional Space.

"It's too perfect."

Lin Yuan's mind and spirit were somewhat immersed in it.

The most microscopic particles of Undying Substance were composed of thirty-three basic units.

The thirty-three basic units interwove and balanced one another. Individually, their power was not strong.

But if they gathered in a certain quantity, that was a terrifying power that reached straight to the Thirteenth Order.

The Supreme Emperors of the Third Source World used Undying Substance to condense their true bodies, and in the end, they unleashed strength approaching that of Red Dust Immortals.

Lin Yuan went a step further than that. Merely by reconstructing one-tenth of his physique with Undying