System Bestows me with Immortality, Living on to Eventually Become Invincible

However, he had heard about mid-grade spirit stones, with the commonly accepted exchange rate being one to a hundred. But in reality, one could easily exchange for 120 low-grade spirit stones.

Chen Xun and Black Bull hid in a secluded corner, their gazes constantly sweeping the surroundings, with one hand gripping the Mountain-axing axe tightly.

"Bull, we're going to be rich," Chen Xun whispered with glee.

"Moo~" Black Bull lowed softly, its head nestled in Chen Xun's embrace, eyes brimming with joy.

The greatest use of low-grade spirit stones was for cultivation, as the pure spiritual energy they contained was far superior to the natural spiritual qi of heaven and earth, which cultivators had to refine to remove impurities.

But that was a practice for the big dogs of the world of immortals; ordinary cultivators could only use them for trade, because the effects of Qi-Enhancing Pills were somewhat better, although they could lead to resistance.

And to develop resistance from consuming Qi-Enhancing Pills meant one was a super big dog; it wasn't something ordinary cultivators even considered.

The next day, they continued peddling their booklets and finally gathered a hundred low-grade spirit stones. Chen Xun trembled with excitement, while Black Bull mooed incessantly, circling around him.

"Bull, we must keep a low profile," Chen Xun said sneakily, feeling as though everyone was after their spirit stones.

"Moo! Moo!" Black Bull understood and called out.

On the third day, they stopped selling booklets and instead browsed the various stalls. Suddenly, Chen Xun's eyes lit up when he spotted a familiar 'old acquaintance.'

"Miss, it's you."

The girl's appearance hadn't changed much; she was just as he remembered, with several spiritual herbs and bottles of Qi-Enhancing Pills displayed in front of her stall.

She was startled, recognizing those familiar legs and the four black hooves of the bull; the thought crossed her mind—why has this bandit come with a bull again?

"Hehe, it's you," the girl said with a forced smile, the image too deeply ingrained in her memory to forget.

"We're here to buy, we have spirit stones."

"That's great, what would you like to buy?"

The girl's eyes sparkled, her spirits lifted, as long as they weren't here to tease her.

"Could you introduce me to these three spiritual herbs..."

Chen Xun squatted down, offering an awkward smile. Although he had studied medicine, he could still discern a thing or two.

With the girl looking on in amazement, Chen Xun fished out a few spirit stones from his trousers to prove he really had them.

"Alright..."

The girl was taken aback, her gaze dropping to a spiritual herb, "This is Water Cloud Grass, a twenty-year variety, used in the making of Gathering Qi Pills."

"This is Frost Maple Grass, but it's only ten years old, used in Heavy Feather Pills."

"This is Divine Meeting Grass, thirty years old, also used in Heavy Feather Pills."

The girl introduced them one by one. Although not very old, for a solitary cultivator to have harvested so many spiritual herbs was no small feat.

If they were older, many demonic beasts and spiritual beasts would be vying for them.

"Miss, how many spirit stones? I'll take them all."

Chen Xun licked his lips, his eyes fixed on the spiritual herbs. The age seemed particularly easy to judge, matching what he had anticipated.

"Twenty," the girl said after a moment's thought.

"What?!"

Chen Xun stood up, exclaiming in a voice that made the girl frown. She said sweetly, "Then how much will you offer?"

"Eight."

"What?!"

Now it was the girl's turn to stand up and exclaim. Was this how one haggled? "Are you planning to rob me?"

Chen Xun looked troubled, reaching into his trousers again and reluctantly pulling out a few spirit stones, "How about ten spirit stones? That's all I have."

The girl's chest rose and fell as she observed Chen Xun's expression, but she couldn't read anything from his face—just his nose, eyes, and mouth were visible.

"Deal," the girl nodded firmly.

"Throw in three cases for me; I have nothing to carry them in..."

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Chen Xun eyed the medicine cases behind her, having long coveted them. It was clear she was a professional spiritual herb seller.

The girl's eyes widened—this man really was a bandit at heart, plucking every feather from the goose. Nevertheless, she gave him the cases, and in the end, even offered Chen Xun a sweet smile.

"Bull, we need to be frugal where necessary and spend where needed, understand?"

"Moo moo!"

Black Bull nudged Chen Xun discontentedly; they had long understood this principle in the mortal realm.

"Big brother, how much for this Fireball Technique?" Chen Xun approached a stall selling techniques, his expression as calm as an ancient well.

A middle-aged man glanced at Chen Xun, his pupils dilating slightly: "Four low-grade spirit stones."@@novelbin@@

Chen Xun's face showed difficulty, his eyes wavering with indecision. Black Bull tugged at him, urging him to leave.

"Wait, fellow Daoist."

The middle-aged man looked at Chen Xun and then at Black Bull, "Do you really want it?"

"Uh, yeah, kinda," Chen Xun nodded slightly.

"Take it for two spirit stones!"

"Brother, you're straightforward."

Chen Xun praised him, taking out two spirit stones from his trousers and leaving with the technique in one smooth motion.

The middle-aged man shook his head slightly, pulling out another copy of "Fireball Technique" from under the stall. It was a dime-a-dozen technique; he could print countless copies.

Chen Xun and Black Bull bought one technique from each stall, never more.

"Goods Taming Technique," "Basic Alchemy Technique," "Compendium of Spiritual Herbs," "Spiritual Clarity Technique," and others, they even splurged on a bag of spiritual herb seeds, their hundred spirit stones quickly dwindling.

Chen Xun and Black Bull walked through the valley, their hearts pounding rapidly. They felt their wealth was too great, and countless solitary cultivators might want to rob them.

"Bull."

"Moo~"

The man and the bull exchanged a deep look, quickening their pace and dashing out of the valley, disappearing from sight before the ten great immortal sects even made an appearance.

...

On the outskirts of the Cloud Mountains, they occupied the den of a wild beast, a massive boulder sealing the entrance, immovable by ordinary people.

The boulder was covered in vines, dense and tangled. If one wasn't looking on purpose, they wouldn't even notice there was a cave.

Crack!

A spark of fire lit up, illuminating the entire cave. Chen Xun's face flushed with excitement, while Black Bull ran around wildly.

"Bull, wealth should be concealed, keep a steady mindset."

Chen Xun said with a trembling voice, chuckling, "Look at you, when will you be calm like me?"

"Moo~~"

Black Bull rubbed against Chen Xun, brimming with joy, "Moo moo!"

"We have 15 points of World Soul, that's 30 together, enough to accelerate the growth of spiritual herbs by more than two years in just one day."

Chen Xun grew more excited as he spoke, spittle flying, "Bull, can you do the math? How many years is that in a month?!"

"Moo moo?" Black Bull called out twice, using stones on the ground to do the calculations.

"75 years!"

Chen Xun exclaimed excitedly, looking at Black Bull, "A hundred-year-old spiritual herb every month, my goodness."

"Moo? Moo moo!"

Black Bull was shocked, dropping the stone. They had inquired before—a hundred-year-old spiritual herb was worth between one hundred to two hundred low-grade spirit stones.

They also had spiritual herb seeds; sell those, then buy more, an endless cycle. Who in the world of immortals could have more spirit stones than them?

"Don't get ahead of yourself; we don't have the strength yet to sell in large quantities."

Chen Xun saw Black Bull's expression and knew what he was thinking, "We'll sell one, buy another; that won't attract attention. Besides, we need to refine our own pills."

"Moo moo!"

Black Bull nodded continuously, eyes wide and stunned, nearly floating away.

"Let's first cultivate the three spiritual herbs from the medicine cases to a hundred years. As for those spiritual herb seeds, we'll plant them one by one."

Chen Xun spoke calmly. A hundred-year-old spiritual grass planted outside would attract the attention of many demonic and spiritual beasts with its unique fragrance.

But these medicine cases could not only preserve the medicinal properties but also conceal the fragrance. In the future, they would need to get more, Chen Xun thought to himself.