Chapter 648: Endless Dao Mountain

After parting ways with Tianhong Emperor, Gu An made a brief visit to Tai Cang Continent, gathering herbs at the Mountain God Temple. Then, he went deep into an uninhabited mountain forest, far removed from the mortal world.

Seated beneath a towering tree, he activated the Lifespan Breakthrough function.

【You have activated the Lifespan Breakthrough function. Based on your current realm, the following breakthrough locations have been selected for you:】

1. Path of the Grand Dao

2. War Spirit Sacred Palace

3. Taiwei Earth Core

4. Spirit Mountain

5. River of Destiny

6. Endless Dao Mountain

7. Tai Chu Emperor Domain

8. Xuan You Divine Abyss

9. Supreme Origin Forest

Gu An frowned slightly.

Desolation Tomb wasn’t listed.

He had planned to break through there and find a way to rescue Sin from the tomb.

In his view, once he advanced further, he should be strong enough to see through the mysteries of Desolation Tomb.

Even among Wondrous Truth Grand Luo Immortals, those capable of creating their own worlds were rare. If he ascended to an even higher realm, even if he wasn't the strongest, he would at least be among the most powerful existences within the Grand Dao.

By saving Sin, he could use him as a key to trace the karmic ties of Yao Xuan Fairy, ultimately resolving the lingering obsession left behind by the Eternal Emperor.

To Gu An, such matters weren’t burdensome—in fact, he found them exciting.

Cultivation and strength must be tested through action!

"If Desolation Tomb isn't listed, does that mean it can't withstand my breakthrough, while these places can?"

A sudden thought crossed Gu An’s mind.

If that were true, did it imply that these nine locations possessed powers beyond Wondrous Truth Grand Luo Immortal?

Even if they didn't, they were at least capable of nurturing stronger Da Luo Immortals, something the Heavenly Spirit World could never achieve.

After all, the Heavenly Spirit World couldn’t even produce Golden Immortals, let alone higher existences.

Gu An pondered in silence.

After careful consideration, he chose Endless Dao Mountain.

The name alone carried a sense of profound mystery, making it an ideal place for concealment.

【Teleporting to Endless Dao Mountain requires a cost of 10,000,000,000 years of lifespan. Proceed?】

Proceed.

A long-familiar sensation washed over him, making him instinctively close his eyes as his senses faded.

Moments later, he felt his feet touch solid ground. His eyes snapped open, and almost instantly, he activated the Lifespan Barrier.

Only after fully deploying the barrier did he turn his attention to his surroundings.

The sky was dark, resembling the vast emptiness of the cosmos. Below, colossal mountain ranges stretched endlessly, their peaks rising and falling like the spines of ancient beasts.

There was no telling where this world ended, nor how many mountains it truly held.

Even with his Wondrous Truth Grand Luo Immortal Realm (Perfected) cultivation, Gu An could not see the limits of this world.

Another boundless universe, constantly expanding?

He noticed that each mountain contained immense Dao Intent, as if nurturing the fundamental principles of the Grand Dao itself.

The atmosphere was heavy. The Endless Dao Mountains stood like divine titans, exuding an aura of primal vastness in the eternal darkness.

The mountain beneath Gu An’s feet was immense. Even standing at its peak, he felt as though he were on an entire continent. Its height surpassed the distance from Nine Spirits Continent’s surface to its outer skies.

And yet, this wasn’t even the tallest of the Dao Mountains.

In the distance, mountains that resembled celestial barriers loomed, their presence incomparably majestic and imposing.

"Endless Dao Mountain… I wonder how far it is from the Great Thousand Worlds…"

A spark of curiosity flickered in Gu An’s mind.

He had never heard of Endless Dao Mountain before.

The more unknown and powerful realms he encountered, the more excited he became.

If the end of the Grand Dao was easy to reach, wouldn’t that take the fun out of cultivation?

Gu An sat down cross-legged and pulled up his attribute panel.

Time to enhance my physique—it's been a while since I last improved it!

Gu An directly invested 10,000,000,000 years of lifespan, but the Hunyuan Reincarnation Immortal Physique did not undergo any transformation.

He continued pouring in more lifespan.

In the end, after consuming a total of 40,000,000,000 years, the Hunyuan Reincarnation Immortal Physique evolved into the Hunyuan Dao-Creating Physique.

A vast surge of Dao Spirit Energy erupted, illuminating the ground beneath Gu An’s feet with a dazzling Dao light, but it remained confined within the Lifespan Barrier. Outside the barrier, the surrounding mountains showed no visible changes.

Gu An quickly sank into the inheritance.

The Hunyuan Dao-Creating Physique retained all the characteristics of his previous physique—undying through reincarnation, boundless mana, yet now it also possessed the ability to create new Dao.

That’s right—a Dao independent of the Three Thousand Grand Daos!

It was a brand-new Dao, created from his own mana and physical strength.

As before, no matter how profound the transformation, Gu An only took less than one hour to complete his evolution.

When he opened his eyes, a sharp gleam flashed through them.

Creating a Dao?

A thought struck him—there were countless Daos in existence. Even he couldn't determine their exact number. What if some of these Grand Daos were originally created by cultivators?

For now, he had no way of confirming this theory. Instead, he shifted his attention to the techniques displayed on his status panel.

Now, it was time to enhance his main cultivation technique!

Gu An invested 10,000,000,000 years of lifespan into the Grand Dao Sovereign Art.

After investing nearly 35,000,000,000 years, the Grand Dao Sovereign Art advanced into the Ten Thousand Dao Annihilation Art!

The Ten Thousand Dao Annihilation Art was a stark contrast to its previous grandeur. Now, it was filled with an aura of destruction. At its peak, the concept of sovereignty transformed into absolute obliteration—leaving no trace behind, erasing everything, and standing alone above the Dao itself.

After another half an hour, Gu An continued upgrading his abilities.

The Sun and Moon Selfless Divine Dao evolved into the Eternal Dao Spirit Thought, consuming nearly 30,000,000,000 years of lifespan. This was Gu An’s primary method for concealing his cultivation and aura, so he couldn’t afford to neglect it.

The enhancements continued!

The Limitless Heaven-Locking Step advanced into the Grand Hunyuan Celestial Net Step, consuming nearly 40,000,000,000 years!

The Hongmeng Transformative Golden Body evolved into the Grand Dao Formless Body, consuming 30,000,000,000 years.

This Supreme Art was an evolution of the Demon Shadow Divine Art. It not only allowed transformation and shapeshifting, but also blocked karmic deductions and fate divinations, which was extremely useful for Gu An to maintain his secrecy.

Another half an hour passed.

Gu An successfully refined the Grand Dao Formless Body. Even without actively using it, his physical form was immune to divination, and this form also strengthened his aura and suppression force, making it function as a powerful suppressive divine ability.

With the fundamental enhancements completed, it was time to focus on combat techniques.

Ordinarily, Gu An would prioritize sword techniques, but this time, he decided to enhance the Immortal Emperor Eyes instead.

The Immortal Emperor Eyes were too powerful for him to abandon. However, this divine ability could easily attract the attention of the Heavenly Court, so he had to advance it to a higher level, ensuring that even the Heavenly Court’s will could not perceive it.

As Gu An contemplated this, Endless Dao Mountain, which had remained eerily silent, suddenly underwent a change.

His continuous enhancements of Dao techniques triggered a disturbance in the rules of the Grand Dao. Fierce winds howled, thunder roared, and some Dao Mountains even began trembling.

Previously, there had been no signs of living beings in this realm.

But now, one had appeared!

Gu An turned his gaze toward a distant direction.

On a colossal Dao Mountain in the far horizon, a massive shadow emerged. It was humanoid in shape, standing at the mountain’s peak like an ancient demon god, shrouded in an aura of mystery and power.

Even with his Lifespan Investigation, Gu An couldn’t see through its true form—which meant that the figure had yet to fully reveal itself.

And yet, its aura alone made his heart tremble.

Wondrous Truth Grand Luo Immortal!

And not a mere beginner-level one!

Gu An glanced at the figure but didn’t pay it much attention. With his Lifespan Barrier active, the entity would struggle to detect him.

He focused back on enhancing the Immortal Emperor Eyes.

He immediately poured in 10,000,000,000 years of lifespan!