The Red-Crowned Old Demon's carriage was pulled by three cultivators, also at the Golden Core level, but clearly less agile and flexible than the two pulling Nineteenth Aunt's. This is why the Red-Crowned Demon immediately asked to exchange when they first met.

There's nothing that can be done. Even though they tried their best to appear stiff, anyone can find traces because they are not truly rigid. Nineteenth Aunt had to use divine skills to cover for them; fortunately, along the journey, the Winged Demons accepted her explanation as commonplace.

As they approached the depths of the Kneecap Desert, dozens of Winged Demons drove luxurious carriages over, and to the other demons watching, everything seemed natural, and no one doubted the two anymore, thinking it was simply the norm for the West Sea.

This was the reason why the three of them had to travel onto the sea together, so it didn't appear abrupt.

Entering the Kneecap Desert, the sky suddenly became lively. The so-called Great Demon Gathering is actually inaccurate; the number of demon clans far exceeds ten thousand. Every demon, proud of their identity and power, comes to join, which is inherent in demon nature; they enjoy gathering in tides.

Among all the demon clans attending the gathering, in terms of ceremonial flair, the Winged Demons' display was the most flashy and extravagant.

They have never understood what low-key and restraint mean; they wish to wear their power on their faces, so every monster would know at a glance not to mess with them.

Traversing over ten thousand miles deeper into the desert, with no sign of the wing swarm stopping, the sky was filled with demons in a spectacular view.

"Do you know how deep the desert goes?" Tan Xiao gazed at the densely packed demon beasts around him, feeling uncertain. If exposed now, there would be truly no escape to heaven or earth.

Hou Niao dared not look around, he could only roll his eyes, "I don't know. Back when I was in the desert, I entered less than five thousand miles. What does it say in your Daoist Sect annals?"

Tan Xiao smiled wryly, "It seems they couldn't find the edge. A Nascent Soul elder once investigated, and was forced back by the Undying Demon after entering twenty thousand miles, nobody knows whether the desert ends in the void or connects to the sea."

Hou Niao seemed indifferent, "For this Great Demon Gathering, don't assume you must accomplish something. As you can see, surrounded like this, if something happens, none of us three can escape. Finding the culprit is important, but it's more likely we won't succeed. After all, the two of us cannot expose ourselves, relying solely on Nineteenth Aunt is difficult, and the Winged Demons have an awkward status in this gathering; they might not help us."

Tan Xiao nodded, "I know, stop nagging. Do you think I'm the type who doesn't know the gravity of the situation? It's always you causing trouble, right?"

Hou Niao laughed cheekily, "The most practical measure is to catch a few outer space demon beasts and then exchange with them; can't use force, need to act opportunistically, best to strike when something arises internally among them."

Tan Xiao understood his implication, "So you've been teaching Nineteenth Aunt to stir up conflict between the Winged Demons and the mainstream of the demon clan?"

Hou Niao snorted coldly, "Flies don't sting seamless eggs; this is an age-old conflict, wasn't caused by me, just borrowing it slightly, isn't that excessive?"

The wing swarm continued flying forward, barely needing direction, like a river flowing towards the sea, vast and mighty, waves surging.

Hou Niao had seen great beast tide scenes, but then he was also surrounded by a well-organized human army; the feeling was entirely different. Only by being within can one realize their own insignificance. The two exchanged a glance, humbly curbing their arrogance, working hard to play the fool.

Not acting smart is genuinely impossible; knowing when to yield is true wisdom.

Thus, they flew another fifteen thousand miles with their tails between their legs, before encountering a chaotic spiritual energy fluctuation ahead. Even in the cloudless desert, it seemed a massive tornado connected to the heavens and the earth, which wasn't a natural phenomenon, but gathered demon energy.

Demon Qi spiraling, startling heaven and earth!

Unlike previous battles where various demon clans fought individually, this time it's the congregation of the entire Jinxiu Continent's demon clan essence, with no minor demons to fill numbers; Golden Core level Great Demon is the lowest, all being elite among them.

Such a demonic gathering exhibits at least ten times the combat power of any former demon clan. This is the true elite of the demon clan, proving the Great Demon Gathering isn't just a name.

Even Nineteenth Aunt, who always ignored Earth Demons, couldn't resist reminding the two, "Stay calm, life is precious."

In truth, her reminder wasn't necessary; the two cultivators were wily as foxes, wishing their tails could retract into their bodies. Their expressions were perfectly convincing; Hou Niao's body trembled under the demon Qi, Tan Xiao drooled...

All masters of acting witlessly.

In sight, appeared a gigantic sand mountain, measuring a thousand yards in height, mighty and imposing. Yet, it looked somewhat eerie, like a termite mound; both were knowledgeable, finding such nests normal underground, but appearing so massive on the surface was bewilderingly surprising.

The entire mountain emanated a bone radiance, reflecting a grim white light under the sunlight.

Tan Xiao gently spoke with his divine sense, "It's indeed real. Ancient texts mention a Bone Mountain in the Kneecap Desert, composed of the bones of deceased undead beings, exceptionally solid, indestructible. Now it seems those words weren't false."

Hou Niao wasn't too knowledgeable of these. Truthfully speaking, the Quanzhen Sect's annals fell short compared to the Daoist Sect in scope.

"Bones of the deceased? Is it a burial? Or collected?"

"It's burial. Every undead being, sensing their end, travels vast distances to this place, finds a spot on the Bone Mountain, immerses their divine soul, offering their bones. They believe doing so allows for quick rebirth, but in reality, they enter the Underworld for transformation, unbeknownst what form they'll take upon reincarnation. Yet, in terms of solidity, such a bone mountain is extremely refined; those skeletons seem naturally grown there."

"Accumulating over time, it now forms the current thousand-yard-high scale, truly rare in the desert."

Hou Niao still didn't fully grasp, "For such a tall Bone Mountain, its base being drifting sand, won't it collapse?"

Tan Xiao sighed, "You see the exterior, not the interior. This Bone Mountain's depth buried beneath the sand is no less than a thousand yards, hence stable as a pillar, not fearing sandstorms."

Both looked at the Bone Mountain, sighing at the undead beings.

"Does it have a name?"

"Minggu Mountain."

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