Meng Yirou had quite the experience.

The "Divine Medicine Treasury" of the Divine Medical Palace contained countless treasures of heaven and earth. Although "countless" might be an exaggeration, there were indeed many. Ever since Meng Yirou entered the gates of the Divine Medical Palace, this treasury had become her usual haunt.

As her knowledge grew, she began to realize that the items in the Divine Medicine Treasury were anything but ordinary. Some were even long-lost, rare herbs that the outside world only knew by name but had never seen.

So, she dared to say that the treasures she had seen were not few.

But what did she just see!?

This "senior" had pulled out seven kinds of medicinal ingredients at once, and she remembered their names clearly, or rather, she remembered them because she had seen them in the Divine Medicine Treasury!

A Six Poison Dragon Serpent Gall of sixty thousand years!

A Thousand Wood Vine of twelve thousand years!

And then there were the Purple Demon Thorn Flower, Mountain Heart Fire Lotus, Ice Soul Phoenix Leaf... Although it was just a fleeting glance, Meng Yirou was certain she hadn't seen wrong!

It was her first time seeing a Six Poison Dragon Serpent Gall of sixty thousand years because when the Six Poison Dragon Serpent reached sixty thousand years, it would transform into another type of beast in the precise span of a single breath!

Thus, the "Six Poison Dragon Serpent Gall of sixty thousand years" was an extremely rare legendary medicinal ingredient!

Even the Divine Medicine Treasury didn't have such a thing.

She had initially thought Gu Heng was too arrogant, daring to casually belittle even the Palace Master of the Divine Medical Palace, yet he stayed in this rundown Medicine Hall in a small, desolate town. But now, looking at the seven ingredients already placed into the alchemy furnace, Meng Yirou suddenly had a feeling that this senior's tone might not have been so arrogant after all.

But it still depended on what kind of pill he could refine. Having treasures of heaven and earth and being able to refine the highly sought-after spiritual pills and divine medicines were two different matters.

Her lips trembled, but she tried hard to appear less shocked. At least her expression remained normal, especially since Bai Fei'er was beside her. With her limited experience, Meng Yirou couldn't afford to act like someone who had never seen the world—wait!

What did he just do!?

These seven ingredients had extremely potent properties and would conflict with each other!

Especially the Mountain Heart Fire Lotus and Ice Soul Phoenix Leaf; these two ingredients couldn't even be placed together, or they would explode. In Desert North, an Eighth Grade Alchemist had tried to experience the "ice and fire" sensation by throwing these two ingredients into the furnace, and even before starting the refinement, a violent explosion occurred due to the conflicting medicinal powers.

Since then, Desert North had one less Eighth Grade Alchemist.

And he just directly put these seven ingredients into the furnace...

Meng Yirou immediately became nervous, but she couldn't speak, because when an alchemist was refining pills, they were in a state of utmost concentration, and any disturbance could lead to failure and even backlash on the alchemist!

She herself was a Sixth Grade Alchemist, but seeing Gu Heng's "rough" and "fearless" method of refining, she truly felt fear in her heart.

Gu Heng, of course, noticed Meng Yirou's tension and apprehension.

He glanced at Meng Yirou and said calmly, "Watch closely, the path of alchemy has many intricacies."

Meng Yirou and Bai Fei'er immediately focused intently.

Since he said so, they might as well watch.

A ghostly blue flame had already automatically ignited beneath the furnace, instantly heating it up. Gu Heng saw the Python Gall, Luohan Fruit Leaf, Red Lotus, Purple Orchid, and other ingredients he had just taken, quickly melting under the high temperature.

Gu Heng was very adept with this furnace because it was also a gift from the System, grandly named the "Universe Purple Gold Furnace." In reality, it was neither purple nor gold, nor did it have anything to do with "universe"; it was just a shabby red-lacquered furnace. Its only advantage was that it could ignite itself, without needing to be placed on a stove.

And Gu Heng only needed to control the intensity of the flame with his thoughts.

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Convenient and easy to use.

But it still couldn't change the fact that it was just a shabby furnace.

"This, this is...!"

Meng Yirou and Bai Fei'er both widened their eyes, seemingly immersed in the wonder of Gu Heng's alchemy.

Because in this environment where an alchemist valued calmness and focus, they could feel Gu Heng's control over the flame and the technique of shaping the pill!

A warm current flowed through their bodies.

This was neither an illusion nor a misconception.

Meng Yirou and Bai Fei'er felt differently, but one thing was the same: they were unconsciously drawn to Gu Heng's actions. Even the slightest movement, like a casual flick of his finger, sent ripples of true intent through them!

The alchemy technique was smooth and fluid, fast, precise, and steady, making it a pleasure to watch. Meng Yirou and Bai Fei'er were mesmerized.

Moreover, what shocked Meng Yirou the most was that the medicinal power of these ingredients was completely contained within the furnace fire!

During alchemy, no matter how precisely an alchemist controlled it, there would still be some medicinal power leakage, damaging the furnace or cauldron itself. At this point, a higher quality, spirit-engraved furnace would be used to help control the dispersing medicinal power and the heat.

But Gu Heng's furnace was very ordinary, yet the potent and conflicting ingredients were thrown into the same furnace, and not only did the furnace not explode, but there was no medicinal power leakage at all!

What did this indicate?

It indicated that Senior Gu's alchemy technique was extremely advanced, almost to a perfect degree!

He could not only control the properties and fusion sequence of each ingredient but also completely seal the medicinal power, preventing them from affecting each other!

What level of alchemy skill was this!?

Wait, is this... still alchemy?

This is simply art!

"No wonder he's a master alchemist..."

Meng Yirou couldn't help but murmur, feeling lost. Although she tried her best to maintain her composure, her heart was in turmoil!

She couldn't yet determine whether Gu Heng's alchemy skills were superior to her master's because she was just a Sixth Grade Alchemist and couldn't possibly judge which of the two alchemy experts was better!

Moreover, the more she watched, the more she felt that Gu Heng was surrounded by a profound and mysterious aura, and the intense true intent was impacting her and Bai Fei'er's minds. In the next moment, Bai Fei'er shuddered!

Meng Yirou looked over and discovered that Bai Fei'er had actually broken through.

She was now at the eighth level of the Elemental Infant stage, even touching the threshold of the ninth level.

As for herself, she had already broken through to the second level of the Out-of-Body stage during her travels, but now, her foundation was rapidly solidifying. Although there was still some distance, Meng Yirou felt that she would soon be able to break through to the third level!

Just by watching Gu Heng refine pills, they had gained so much!