The second day.

In Danxin Cave, the aroma of medicine wafted through the air, mingling with the sulfur scent of the Earth Fire to form a unique fragrance.

Chen Sheng took a deep breath, retrieved the Cyan Abyss Cauldron, enveloped it with his Divine Sense, making it swell to half a person's height, and then began refining Tier Two High Grade Elixir — the Nine Yang Pill.

With the Spirit Light flickering at his fingertips, he carefully took out the prepared spiritual materials such as "Nine Yang Grass" and "Red Sunflower."

Assisted by Divine Sense and Mana, he precisely separated impurities, trimmed portions, each movement exceptionally steady.

After the preparation, he flicked his finger, and a wisp of pale golden Spiritual Fire dove into the Earth Fire vent at the bottom of the Pill Furnace, using the Spell to slowly guide the Earth Fire into the cauldron.

Before long, flames began to rise within the cauldron.

Chen Sheng's gaze was sharp as an eagle, and his Divine Sense was like a dense net, tightly wrapping around the entire Pill Furnace, not missing a single subtle change inside.

With unpredictable changes in the Spell at his hands, he summoned flames to evolve into a "Yin Yang Formless Purgatory" — red Yang Fire and dark green Yin Fire intertwined inside the cauldron.

Chen Sheng meticulously adjusted according to the Pill Formula requirements, maintaining an exact balance of six parts Yang and four parts Yin.

When the moment arrived, with a slight movement of his Divine Sense, he sequentially threw the processed spiritual materials into the fire.

The Yin Yang Fire, like dexterous hands, interwovenly refined the herbs, extracting each particle's pure medicinal power…

"Pop!"

A light sound rang out as the flames inside the cauldron suddenly spiraled into chaos.

The medicinal power that should have gradually condensed instantly dissipated, turning into a pile of charred ashes.

An expression of disappointment flashed between Chen Sheng's brows, as he turned towards the quietly seated Dragon Void Daoist behind him, bowing:

"Disciple is dull-witted, seeks Master's guidance."

Dragon Void Daoist stroked his crimson beard, an expression of amusement in his eyes:

"Do you know where the problem lies?"

Chen Sheng concentrated, recollecting each phase of alchemy from material handling to fire control, finally hesitantly said:

"Disciple's Fire Technique… is still lacking in stability and subtlety."

"Good!" Dragon Void Daoist applauded, praising:

"Indeed, you possess considerable spirituality in the way of alchemy."

"Correct, although your Formless Purgatory seems smooth and rises and falls at will, it's far from reaching true Yin Yang Complement Each Other."

With that,

He snapped his fingers, and the remaining charred bits in the Cyan Abyss Cauldron spontaneously ignited, followed swiftly by the emergence of a red Fire Flood Dragon, coiling around the entire Pill Furnace.

"Watch closely!"

Dragon Void Daoist pointed a finger, and the Fire Flood Dragon spewed out an extremely tiny Profound Ice Cold Flame Bead no larger than dust.

In an instant, amidst the blazing furnace, a speck of icy blue cold flame floated.

Though seemingly incompatible, the two continuously transformed and balanced on an extremely fine level, maintaining a marvelous equilibrium.

Witnessing this scene, Chen Sheng's heart was astonished, feeling as if he'd seen divine craftsmanship!

— That ratio of Yin Yang Fire wasn't merely precise to ten parts out of ten?

It was likely precision to one part in ten thousand!

Chen Sheng was only capable of handling changes at a ten-fold precision at present, realizing now that the sky's the limit!

Dragon Void Daoist laughed warmly:

"You lack the profound Divine Sense of a Master, naturally cannot reach such a realm."

"But you aim to refine High Grade Elixir, at least need to advance in stability and precision."

He shifted the topic directly to the core:

"Take this Nine Yang Pill for instance, the ratio of six Yang to four Yin wasn't wrong, but you failed to maintain it stably."

"At the pivotal moment of extracting medicinal power, the Yang Fire surged to six-fold four, and Yin Fire fell to three-fold six, thus too intense, naturally reducing herbs to ashes."

Chen Sheng nodded lightly, an epiphany in his heart, eagerly seeking solutions.

Dragon Void Daoist looked at him with an ambiguous smile:

"If you seek an effortless solution, naturally it'd be to enhance your Cultivation and extend your Divine Sense, but as Master says, you might not be content with that."

He paused slightly, then continued:

"I recall you chose 'Heaven-Encompassing Fire Technique', have you gained anything?"

Chen Sheng nodded frankly:

"It's a Tier Three Secret Technique, profound and esoteric, as a disciple, I have yet to begin."

Dragon Void Daoist wasn't surprised:

"Actually, within that Fire Technique lies the thought to address your current predicament — Array."

"'Heaven-Encompassing Fire Technique' was created by a Master specializing in Pill and Array Dual Cultivation."

"Later, a predecessor from our sect found the Technique too profound, hence devised a basic version, 'Circulation Star Melting Furnace'."

"However, that predecessor wasn't proficient in Arrays and only left some rough notes at the Fourth Layer."

With that, he took out an ancient Jade Scroll from the Storage Ring, suspending it before Chen Sheng, tone conveying some preciousness:

"Heaven-Encompassing Fire Technique is challenging to cultivate, this is Master's comprehension, combined with a self-created Technique. Take it back and thoroughly comprehend."

Chen Sheng promptly accepted the Jade Scroll, bowing in gratitude:

"Thank you, Master."

Dragon Void Daoist nodded: "Continue."

Chen Sheng was taken aback, strangely stated:

"Disciple can't even pass the merging medicine step now, how to proceed?"

Dragon Void Daoist laughed heartily:

"Master will assist you with Divine Sense, allowing you to personally experience a complete refining process."

Chen Sheng's heart filled with gratitude, bowing again:

"Thank you, Master."

He reinvigorated his spirit, diving into alchemy once more.

This time, under Dragon Void Daoist's exquisite aid with Divine Sense, the Yin Yang Fire stabilized as a rock.

Upon adding spiritual materials, the medicinal power was perfectly extracted, merged, seamlessly passing through steps like merging medicine, Vortex Condensation, and Solidification Locking Spirit…

Throughout, Dragon Void Daoist continually pointed out his slight mistakes:

"Here the Fire Control was rushed, the medicinal power hasn't completely emerged"

"The Spell during Spirit Lock was late, causing a leakage of medicinal power."

…

To create an unforgettable memory, Dragon Void Daoist withdrew his assistance multiple times, letting Chen Sheng experience the consequences of mistakes by himself.

Undoubtedly, without assistance, it either resulted in a pile of ashes or formed an ineffective Wasted Pill.

There were even two instances where the flame ran amok, nearly blowing up the furnace.

Chen Sheng was shocked, cold sweat pouring, realizing now how many hidden risks were cast within his previous alchemy skills.

Dragon Void Daoist remained calm, seemingly foreseeing this long ago.

These are common issues for the talented, he committed many similar errors back in the day.

"You relied on your alchemy talent and progressed too smoothly, neglecting many fundamental issues."

"These issues when refining Low Tier Elixirs are less impactful, but touching High Tier Elixirs become crucial flaws."

"Alchemy Dao is intricate, even the slightest difference can lead to miles off course, can one afford to be careless?"

With that, he took out two Jade Scrolls recording his own alchemy experiences, handing them to Chen Sheng.

Chen Sheng took them with both hands, bowed respectfully:

"Master's teachings will be etched in my heart."

Dragon Void Daoist was quite pleased with his attitude, nodded lightly:

"Alright, we'll stop here today, you still have a journey ahead for Tier Two High Grade Elixir."

"Luckily, Tier Two Middle Grade Elixir poses no issue for you anymore, I've sent a message to your Third Senior Brother to rearrange Household Affairs duties for you."

"Tomorrow, report to Pill Cloud Hall."

Chen Sheng hesitated slightly:

"Disciple currently needs to focus on cultivation..."

Dragon Void Daoist dismissed with a wave: "No worries, they're leisurely matters, won't hinder your cultivation."

Upon hearing this, Chen Sheng spoke no further, bowing: "Thank you, Master, disciple takes leave."

…

Returning to Hidden Dragon Cave Mansion.

Chen Sheng immediately took out the Jade Scroll gifted by Dragon Void Daoist, in-depth studying it with his Divine Sense.

As he studied, he became more astonished and impressed, couldn't help but exclaim:

"Master truly possesses unparalleled talent!"

The Jade Scroll documented the 'Divine Inference Array' created by Dragon Void Daoist after studying 'Heaven-Encompassing Fire Technique.'

The cultivation technique is divided into five layers, with one core focus — honing Divine Sense through Array manipulation to significantly enhance its subtle controlling force.

Chen Sheng understood:

"Although not directly strengthening Divine Sense, it maximizes its effectiveness."

"This technique not only benefits alchemy, but in Magical Combat, Fire Control, and tool manipulation it must prove advantageous."

"According to Master's records, achieving the Third Layer brings noticeable benefits."

He spent a moment contemplating, then began cultivation.

Starting the technique only requires mastering basic Array knowledge, which to Chen Sheng, already skilled in Spirit Gathering Array and other basic Arrays, wasn't difficult.

He retrieved several small Array Banners, manipulating them with Divine Sense, following the Divine Inference Array's introductory diagram, arranging and operating them slowly before him…

After half an hour, Chen Sheng felt a slight swelling in his Sea of Consciousness, significant consumption of Divine Sense, pausing thereafter...

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