The Deep Vault stretched endlessly around them, its floating platforms suspended like islands in a sea of mist, stone, and hidden wealth.
As they walked, one simple truth about their world became impossible to ignore:
**Spirit stones were more than currency.**
They were condensed spiritual energy made tangible—used for cultivation, formations, pills, forging, travel, and nearly every other path to power.
Because of that, their value was not judged by size alone, but by both **grade** and **quality**.
**Grade** measured the level of spiritual energy contained within the stone:
* Low Grade
* Standard Grade
* Mid Grade
* High Grade
* Top Grade
But within each grade, there was another distinction:
**Quality.**
A spirit stone could be:
* Low Quality
* Standard Quality
* Mid Quality
* High Quality
* Top Quality
Quality reflected how pure, dense, and stable the spiritual energy inside the stone was.
A low-grade spirit stone of poor quality was little more than a cloudy fragment—useful, but inefficient.
A low-grade spirit stone of standard quality, however, was already worth significantly more.
In fact, within the same grade, **one stone of higher quality was often worth a hundred of the quality below it.**
That pattern held all the way upward.
Meaning:
* 100 low-quality low-grade stones ≈ 1 standard-quality low-grade stone
* 100 standard-quality low-grade stones ≈ 1 mid-quality low-grade stone
—and so on.
Then came the leap between grades, where the gap widened even further.
So a single high-quality mid-grade spirit stone was already wealth beyond what ordinary cultivators or beasts might ever hope to possess.
And top-grade spirit stones of top quality?
Those were treasures.
The kind kingdoms went to war over.
In this world, to possess spirit stones was to possess options.
Power.
Time.
Life itself.
And now, walking through the Deep Vault with more wealth than most beasts could imagine, the fox was beginning to realize something dangerous:
She liked having options.
The fox walked in silence for several more steps, her turquoise eyes sweeping over the endless platforms around her.
Trade.
Power.
Opportunity.
Everywhere she looked, someone was selling something useful.
Something dangerous.
Something worth killing for.
A faint smile tugged at her lips.
She could get used to this.
Her tail swayed once behind her—slow, thoughtful.
Then she glanced sideways at Shen Tu.
"Show me more places like Madam Suyin's."
Her voice was casual, but clear.
"Not street trash."
"Real traders."
Shen Tu blinked.
Then his face lit up again.
"My Lady…"
A grin spread across his muzzle.
"You've asked the right beast."
He straightened slightly, almost smug now that they were back on familiar ground.
"The Deep Vault has specialists."
"If Madam Suyin handles formations and materials…"
He raised a claw and began counting.
"There's Old Fen."
"He deals in pills."
"Not the diluted junk sold in the outer market."
"Real stock."
"The kind beasts save for life-and-death breakthroughs."
Another claw lifted.
"Then there's Hollow Reed."
"An information broker."
"He knows who's sleeping with whom, who's smuggling what, and who's planning to kill whom."
The fox's ears twitched slightly.
Useful.
Shen Tu kept going.
"Third…"
His voice lowered instinctively.
"There's Black Needle."
The fox arched a brow.
"That sounds unpleasant."
Shen Tu gave a weak laugh.
"It is."
"He sells poison."
"Venoms, nerve rot, scent trackers, spiritual suppressants…"
"A little of his dust can make a Foundation beast feel crippled."
The fox's eyes gleamed faintly.
Very useful.
Shen Tu hesitated, then added the last one.
"And…"
"There's Ironroot Hall."
The fox glanced at him.
"What's that?"
"A private auction house."
"Not every night."
"Only when something rare enters the Hollow."
Shen Tu swallowed.
"If you have enough spirit stones…"
"You can buy things there that should never be sold."
The fox's smile deepened.
Now *that* sounded interesting.
Beside her, Little White quietly drank from his jar, golden eyes half-lidded, as though none of this mattered.
The fox looked between Shen Tu and the distant inner platforms.
Then she made her decision.
She did not hesitate.
Her gaze swept past the middle ring, beyond the quieter stalls and hidden alcoves, toward the deeper platforms suspended closer to the mountain's heart.
Toward where the truly dangerous things gathered.
A faint smile curved her lips.
"The auction."
Her voice was light, but certain.
"We're going there."
Shen Tu blinked.
Then his face lit up all over again.
"My Lady has taste."
He puffed up slightly as he turned.
"This way."
The fox followed without comment, Little White drifting beside her with his wine jar still in tow.
As they moved deeper, the Deep Vault changed again.
The floating platforms became fewer, but larger.
The barriers grew stronger.
The beasts grew quieter.
This part of the Vault was not crowded.
Not because there was nothing worth seeing—
but because everything here required wealth most would never touch.
The fox's eyes moved constantly.
A humanoid raven trading sealed bone scrolls.
A tiger-headed beast inspecting a spear that hummed with killing intent.
A white-haired woman—clearly not human—buying an entire shelf of spirit herbs without blinking.
Everywhere—
power.
Money.
Influence.
The fox's tail swayed slowly behind her.
Almost amused.
*For a place run by beasts…*
Her eyes narrowed faintly.
*They've built quite the little world for themselves.*
Not savage.
Not chaotic.
Organized.
Efficient.
Greedy.
In some ways, more practical than humans.
There was no pretending here.
No false righteousness.
No empty rules dressed as morality.
If something was useful, it had value.
If something had value, someone would sell it.
Simple.
The fox liked that.
Not because it was noble—
but because it was honest.
At last, Shen Tu slowed.
He stopped before a broad suspended platform encircled by tall black pillars.
At its center stood a pavilion unlike the others.
Dark wood.
Bone inlays.
Heavy red curtains.
Elegant—
but oppressive.
A plaque above the entrance read:
**Ironroot Hall.**
Spirit lanterns glowed dimly along the roofline.
Two late Foundation Establishment guards stood outside—
both heavily armored—
both carrying weapons that were unmistakably spirit tools.
Even Shen Tu lowered his voice instinctively.
"My Lady…"
"This is it."
The fox stared up at the pavilion, turquoise eyes reflecting the red lantern light.
A slow smile spread across her face.
"Good."
Her voice was almost pleased.
"Let's see what monsters with money fight over."