Outside the cave mansion.

The giant Ice Crystal Nether Sparrow spread its splendid wings, reflecting dazzling brilliance, and then carried the Heaven-Devouring Rat, tearing open a space rift and entering the endless Outer Realm Starry Sky.

Once they left, the space rift in front of Qin Ming’s cave mansion gradually began to close.

Standing on the thousand-foot large Nether Sparrow, the Heaven-Devouring Rat felt for the first time in its life, so delighted and so proud!

The entire rat stood tall and proud, its Essence, Qi, and Spirit full, looking majestic!

Immediately standing with hands behind its back, it waved a small hand, gazing at the vast and boundless starry domain, and couldn’t help but feel a surge of grand ambition!

Imitating Qin Ming, it confidently declared:

"Never thought that this great one would have such a day, standing at the pinnacle of the universe, smiling at the ebb and flow! Waves sweep away heroes, but only I, the mouse, stand unyielding! Hahaha!"

The Nether Sparrow, transformed by Lan Bing Fairy, traversed through the terrifying space rift as if it were at home...

The next moment.

Suddenly it quivered, almost throwing off the Heaven-Devouring Rat.

In an instant.

The Heaven-Devouring Rat’s true form was revealed, almost scared out of its wits.

It scrambled clumsily on the back of the Ice Crystal Nether Sparrow, quickly saying tremblingly, "Elder Lan Bing, don’t scare me! Fly steadily..."

Screech!

With a long whistle.

The Ice Crystal Nether Sparrow soared above the Nine Heavens.

In an instant, it disappeared into the vast Outer Realm Starry Sky, then flew towards the spatial coordinate node of the Red Flame Wilderness.

In just a short time.

The Heaven-Devouring Rat, riding the Nether Sparrow, tore open a space rift and reached the destination.

Immediately, the two concealed their auras and headed towards the ring-shaped mountain range.

The Heaven-Devouring Rat didn’t hesitate, immediately spewing out black mysterious light, directly opening a very hidden Void Passage, which even ordinary Divinity Transformation Stage cultivators couldn’t detect once inside.

Lan Bing Fairy, who had already resumed her cold and stunning appearance, looked at the Heaven-Devouring Rat and said slightly surprised:

"Oh? I didn’t expect you to have such skills."

The Heaven-Devouring Rat scratched its head and laughed, "Hehe! How can I compare to Elder Lan Bing, though I can’t soar in the Outer Realm, when it comes to tunneling, I’m a professional."

With that, the two figures flickered and disappeared into the Void Passage.

In front of them, the ring-shaped mountain range had already been divided equally by the cultivators of the Netherworld Sect and the Netherworld Sect.

The cultivators of both sects stood with swords drawn, ready to fight at any moment.

It’s just that the Netherworld Sect seemingly didn’t dare to turn against the Netherworld Sect, letting the other side occupy half of the area they painstakingly developed.

The Heaven-Devouring Rat transformed back into a gray-furred giant rat, revealing two sharp claws, casually slashing open the hard rock layer.

After digging for a while.

They arrived near a mining area excavated by the Netherworld Sect.

They saw the Venerable Nether Bone leading several followers, looking at a ten-thousand-foot-deep rock layer below, somewhat at a loss.

"Nether Bone Supreme, what shall we do? We encountered trouble mining the spiritual ore; if we dig further down, we will hit the Ink Crystal Wall Rock layer. This kind of rock layer is extremely difficult to deal with, its toxicity more severe than Nether Crystal Stone. Not to mention the ordinary miners in the sect, even a high-tier cultivator can’t dig through it." A Nascent Soul Elder respectfully reported to the Venerable Nether Bone.

Venerable Nether Bone frowned tightly and immediately said, "I didn’t expect the Netherworld Sect people to come so quickly, we can’t delay any longer."

"If they find out about this, they’ll definitely go to war with us."

"Have people dig through the night, even if it costs lives, we must dig to the bottom."

Several Nascent Soul Elders shivered at these words, but all respectfully replied, "Yes! We will follow the orders of the Nether Bone Supreme."

"Do you think I’m too cold-blooded?" Suddenly, the Nether Bone Supreme asked.

"Disciple dares not!" They all felt a chill in their hearts.

At this moment.

The Venerable Nether Bone sighed deeply and said, "You all have been nurtured by the sect since you were young, and we will rely on you in the future."

"You all know, the Netherworld Ancestor is at a critical moment of breakthrough. Once the Tribulation-defying Treasure is assembled, he will be able to ascend to the Void Refining Stage."

"Once the Netherworld Ancestor succeeds in breaking through, our Netherworld Sect will rise to the Void Refining Sect and no longer have to endure humiliation from the Netherworld Sect like today."

"We won’t even be able to protect the Tier Six resources we’ve mined, and have to hand them over."

"For the sect’s grand ambition, not to mention sacrificing some disciples, even I would do the same."

"Beneath this vein lies a rare ’Thunder Pattern Essence’. And surely deep below, lies the main ore, the ’Thunder Marrow Crystal Stone’."

"This material is a top-grade substance for refining the Tribulation-defying Treasure, which will surely create the ’Nine Dragon Tribulation Seal’, a Supreme Treasure."

The Venerable Nether Bone’s meaningful statement deeply stirred the hearts of those present...

And as the Heaven-Devouring Rat and Lan Bing Fairy listened secretly to their conversation, they couldn’t help but ponder.

"Goodness, the master was right, there are indeed great treasures underground, even beyond master’s expectations."

The Heaven-Devouring Rat knew as soon as it heard the mention of ’Thunder Marrow Crystal Stone’ that it was something even more powerful than the Five-Striped Nether Crystal Stone.

Its eyes rolled, and it immediately continued digging deeper into the thick rock layers with Lan Bing Fairy.

The Netherworld Sect was helpless against the Ink Crystal Wall Rock, yet under the sharp claws of the Heaven-Devouring Rat, it shattered like sand, and their progress remained swift and relentless.

Half a day passed.

Persistence pays off, as the Heaven-Devouring Rat tirelessly dug its way through over ten thousand feet of hard rock.

Along the way, the Heaven-Devouring Rat also excavated many Three-striped and Four-striped Nether Crystal Stones, which it gleefully stored away.

In the outside world, these poisonous ores are rare Tier Four and Tier Five top Heavenly and Earthly Spiritual Materials.

Qin Ming’s neighbor, the Poison Cultivator Luoo Jinghong, risked great danger hunting demons in the Red Flame Wilderness, all for a piece of Three-striped Nether Crystal Stone.

But now the Heaven-Devouring Rat’s storage pouch was bulging, filled with countless pieces, it had lost count.

However, as it continued to dig downward, the earth unexpectedly thundered with fearsome roaring sounds!

Boom!

Crackle!

"Why is there thunderous roaring from underground?" the Heaven-Devouring Rat asked Lan Bing Fairy, perplexed.

Lan Bing Fairy released a powerful Demon Thought, penetrating below, but frowned: "It’s strange, beneath this mountain range lies a terrifying Thunder Attribute power, blocking my Demon Thought and obscuring the view."

"Oh? Really? Let me try." The Heaven-Devouring Rat immediately activated its Bloodline Divine Technique, sniffing vigorously.

Suddenly.

It seemed to discover something incredible, leaping up from the ground in delight: "I smell treasures, like nothing seen before!!"

It was immediately filled with energy again, and continued digging deeper. But as it went down, it found the rock layers increasingly filled with terrifying Thunder Juice, forcing the Heaven-Devouring Rat to retreat.

It nearly got electrocuted like a roasted rat.

Seeing this, Lan Bing Fairy immediately used a Divine Technique to envelop them in Space Power.

Isolating all the terrifying thunder outside.

The Heaven-Devouring Rat realized it could continue digging, and eagerly resumed.

Half an incense stick later.

Crack!

As the final layer of Ink Crystal Wall fell away, a tempest of thunder power surged toward them!

However, the next moment.

When the Heaven-Devouring Rat and Lan Bing Fairy opened their eyes, they froze in shock at the sight before them.

Right before them lay an endless abyss.

And at the bottom of the abyss was a Thunder World formed of azure blue, where countless Thunder Juice intertwined to create Thunder Dragons, roaring incessantly in the chasm.

In the center of the abyss, there quietly hovered a ten-thousand-foot pyramid-shaped Thunder God Mountain!

Moreover, the concentration of Thunder Attribute Heaven and Earth Spiritual Qi here far exceeded the Tier Five level...

The Heaven-Devouring Rat hid behind Lan Bing Fairy, fearing even a glance would shatter its soul.

Lest it strays too far from her, only to get obliterated by the terrifying thunder in an instant...