The next few days.
Gravity testing became the courtyard's regular feature.
At first, Ye Guyi would be left dusty and disheveled by the intense pressure, occasionally even collapsing onto the metal disk from exhaustion.
But with the effects of vast quantities of Blue Jade Pills and Red Jade Pills piling up, the results were astonishing.
Astonishing.
The crushing gravity did not destroy her. Instead, it was like a forging hammer, relentlessly pounding the Soul Power within her body.
The energy that had once been relatively loose was compressed tightly within her meridians, becoming exceptionally condensed and increasingly easy to control.
Not only that.
Under such extreme torment, her physique had become even tougher than that of defensive Soul Ancestors of the same rank.
Huo Yuhao thought that if Ye Guyi swung that short sword at someone now, she could probably shatter their bones with a single slap.
A few days later.
Ju Zi produced a rough blueprint and proposed a Soul Tool research direction concerning the recovery and storage of Soul Masters' Soul Power.
Thus.
Huo Yuhao dragged Xuan Ziwen to the workbench, where they stayed up for several consecutive nights.
"Traditional core arrays are all designed to release power or provide defense."
Huo Yuhao held a charcoal pencil and scribbled furiously across the blueprint.
"What if we don't let the Soul Power escape, but reinforce the array and lock it inside a fixed metal container?"
Upon hearing that, Xuan Ziwen, with dark circles under his eyes, froze.
Lock up Soul Power?
"But energy has an extremely high dissipation rate inside inanimate objects."
"Then we'll layer nested inner loops into the sealing array and reduce the dissipation rate to its minimum."
Huo Yuhao calmly gave his answer.
Xuan Ziwen snatched the blueprint away and bent over the table, beginning a frantic series of calculations.
The facts proved that the idea was feasible.
With the brains of those two combined, there truly was nothing they could not accomplish.
Several rare metal plates.
Several optimized storage and sealing matrices.
Very soon.
The first finished product appeared on the table.
It was a small metal cylinder with a smooth surface and gently rounded ends.
Since its core function was merely storing energy, its overall fabrication difficulty was unexpectedly low.
Huo Yuhao casually gave it a name.
Milk Bottle.
At first, Xuan Ziwen could not quite understand the meaning behind the name.
But when he forcibly poured a strand of Soul Power from within himself into it, his entire body stiffened.
There was no rejection reaction whatsoever inside the metal cylinder. That strand of Soul Power was firmly locked within the core array.
Then, with a thought from Xuan Ziwen.
The Soul Power he had just stored actually flowed back through his palm and into his body with incredible smoothness.
"This..."
Xuan Ziwen's hand holding the Milk Bottle began to tremble wildly, and his face flushed red with excitement.
"Epoch-making... This is an absolutely epoch-making masterpiece!"
He shouted incoherently.
Before this, every Soul Master across the continent had followed one rigid rule.
Release soul skills.
Consume Soul Power.
Find a safe place, sit cross-legged, and meditate.
When facing an evenly matched battle, the contest often was not about who was stronger, but who had more Soul Power and who could endure until the end.
But now, the Milk Bottle had appeared.
Imagine a Soul Master heading to the battlefield with dozens of Milk Bottles full of energy hanging from their body.
They could throw out soul skills like mad while chugging Milk Bottles to restore their power.
That was a perpetual machine that never had to worry about running out of mana.
Even merely considering such terrifying strategic value made goosebumps rise all over Xuan Ziwen's body.
Meanwhile.
Ju Zi stood beneath the corridor eaves, watching the nearly crazed Xuan Ziwen at the workbench, a satisfied curve lifting the corners of her mouth.
In her previous life.
The Milk Bottle had been a Soul Tool that would only be truly perfected and widely introduced much later.
But now.
Because she had made the suggestion, gotten to Huo Yuhao first, and retained Xuan Ziwen with a hefty sum.
This Soul Tool had been brought into existence today.
Without her as a variable, Huo Yuhao might still have been starving in the Star Luo Empire, while Xuan Ziwen would still have been shut away in Mingde Hall, building things in isolation.
The feeling of personally speeding up the timeline and changing the course of history satisfied her immensely.
An intense sense of security and pride welled up in Ju Zi's heart.
At the center of the courtyard.
Huo Yuhao sat in a chair, biting into a pastry, his expression utterly calm.
He did not understand what Xuan Ziwen was so excited about.
It was just a bottle for blue potions.
When he played games in his previous life, who would dare enter a dungeon without dozens of mana potions in their inventory?
The only regrettable part was this.
For now, it still had to be manually charged with Soul Power in advance. It could not absorb ambient energy on its own to restore mana automatically.
That was a small flaw.
Just then.
Ye Guyi, who had just finished practicing her swordsmanship, came over.
She picked up an empty Milk Bottle that had just been assembled and turned it over in her hand, weighing it repeatedly.
"Can this iron can be used as a hidden weapon to throw at people and kill them?"
Ye Guyi looked at Huo Yuhao seriously.
Huo Yuhao fell silent for a moment.
He sighed.
Clearly, for this pure traditional assault-type Soul Master, the concept of sustained combat simply did not exist.
In her simple worldview, an iron lump that could neither cut people nor explode with lethal force was trash.
That mindset was probably beyond saving.
Suddenly.
Huo Yuhao's eyes lit up.
He stared at the row of identical metal containers on the table, a startlingly clear bolt of insight flashing through his mind.
Their capacity was standardized.
Their materials were standardized.
Since second-tier Milk Bottles had precise fixed measurements,
could they be used as units of measurement?
In the past, Soul Masters had always judged the extent of their consumption by feeling.
Probably half used up.
Just a little left.
Everything had to come with the word "probably."
But in the eyes of someone trained by modern test-taking, any energy that could not be quantified was pure nonsense.
At that thought,
Huo Yuhao perked up and immediately grabbed several empty Milk Bottles.
"Sister Guyi, stop spacing out. Pour your Soul Power into them. Switch to the next one whenever one is full, until you are completely drained."
Ye Guyi frowned deeply, her face full of confusion.
But seeing the fanatical look in Huo Yuhao's eyes, she obediently pressed her hand against one.
White glimmers lit up one after another.
One.
Two.
Ten.
As time passed, the color drained from Ye Guyi's face at a visible rate, until she was completely exhausted and slumped limply into her chair.
"Exactly sixty-seven."
Huo Yuhao held a notebook and swiftly wrote down a string of numbers.
Then, he repeated the process, turning his attention to Ju Zi and Xuan Ziwen beside her.
"Three and a half."
"I have three."
When it came to Xuan Ziwen, it took a full two hours before they finally drained the entire reserves of this Soul Douluo.
"Three thousand one hundred and twenty-five."
Huo Yuhao looked at the data listed in his notebook, and the corners of his mouth could not stop curving upward.
That was more like it.
If filling one second-tier Milk Bottle was defined as one unit of Soul Power.
Then the gap in strength between them instantly changed from vague ranks into crystal-clear figures.
He was level fifteen, with three units.
Ju Zi was level seventeen but had cultivated slightly longer, with three and a half units.
Ye Guyi, who had just broken through level forty, had sixty-seven units.
And Xuan Ziwen, who was approaching level eighty-one, had directly reached over three thousand.
Such clarity, precise down to the individual digit, allowed anyone to see at a glance the insurmountable gulf between lower and higher ranks.
With this absolute standard, the difference became immediately apparent.
In the future, when testing new pills or deducing the circulation rate of the Heavenly Origin Art, they could directly obtain extremely precise parameter changes instead of blindly guessing.
Huo Yuhao excitedly slapped his thigh.
What high-endurance Soul Tool?
For someone whose bones were filled with the spirit of scientific research,
this measuring scale, capable of completely quantifying and datafying supernatural power, was the fucking epoch-making masterpiece!
Before you continue