The black-clad figure silently retrieved two stone boxes and placed them on the auction stage. With a wave of his sleeve, the lids of the boxes opened simultaneously, revealing their contents: a translucent crystal of pure purple color and a peculiar mass of dark mud.

The former was about the size of a fist, its surface riddled with pits and covered in crisscrossing purple lightning patterns.

These lightning patterns flickered with purple electric light, resembling solid forms of lightning, emitting waves of violent lightning aura.

As for the dark mud, it appeared unremarkable at first glance. However, upon closer inspection, one could discern a faint layer of dark light emanating from its surface, as if it could devour the surrounding light, making it extremely mysterious.

"One Lei Po Crystal, exchange for a lightning-attribute Immortal Artifact or three hundred Immortal Essence Stones. One mass of Taiyi Yin Mud, exchange for a hundred thousand-year Yin Dragon Ginseng," the figure said tersely.

Han Li couldn't help but smile wryly.

He had thought that his knowledge had greatly increased since joining the Candle Dragon Dao, and that he had a good understanding of various spiritual materials in the True Immortal Realm. Now it seemed that he was still far behind.

He had never even heard of the names of the two items before him.

As he pondered, his gaze swept over the two items, lingering briefly on the dark mud before quickly moving on to the purple crystal.

The dark mud was clearly some kind of extremely Yin substance, which was of no use to him at the moment.

The purple crystal, on the other hand, gave him a sense of familiarity.

The lightning power contained within was very similar to the purple lightning in his purple mussel bead.

The more Han Li looked at it, the more similar it seemed. He couldn't help but secretly guess, could this item also be from the Thunderstorm Ocean?

Moreover, although the purple crystal was not large, the lightning power it contained was truly terrifying, seemingly even richer than that of his purple mussel bead.

Deep within the crystal, faint strands of divine soul fluctuations emanated, as if the lightning power was so concentrated that it had given rise to a sliver of intelligence.

Han Li carefully examined the lightning crystal, a thoughtful expression on his face.

At that moment, his body shook, and a voice echoed in his mind.

"Fellow Daoist Han, you must bid for this Lei Po Crystal... This item is of great use to me." Crab Daoren had awakened at some point and was contacting Han Li through mental connection.

Since merging with the Golden Immortal puppet last time, Crab Daoren had been in a state of slumber. Han Li had tried to communicate with him several times, but had not received any response.

"Fellow Daoist Crab, what exactly is this Lei Po Crystal, and what use is it to you?" Han Li asked through voice transmission.

"Lei Po Crystal is a special lightning crystal that can only be born in places where lightning power is extremely concentrated. In addition to containing abundant lightning power, it also contains a special divine soul power. This item is not only helpful to those who cultivate lightning cultivation methods, but also warms the divine soul and prevents interference from inner demons when worn on the body by other cultivators. I have been working hard to completely merge with that Golden Immortal puppet these days, but progress has been slow. This item will be of great help to me. With it, I can quickly completely master this Golden Immortal puppet," Crab Daoren explained.

"I see, I understand." Han Li said, his heart stirred.

While Han Li was communicating with Crab Daoren, the other cultivators present were also constantly examining the two items on stage with their own methods, but no one spoke, as if most people had never heard of these two items.

The black-clad figure stood motionless on the stage, neither saying anything more nor urging anyone.

"Could you please introduce these two spiritual materials first? Forgive my ignorance, but I have never heard of the names Lei Po Crystal and Taiyi Yin Mud." After a long while, a slightly hoarse voice broke the silence.

"These two items are only exchanged for those who know their value," the black-clad figure said indifferently.

The person who had asked the question snorted coldly and remained silent.

At that moment, a white shadow flashed, and a figure flew onto the stage, revealing itself to be Han Li.

"I'll take the Lei Po Crystal. Here are three hundred Immortal Essence Stones, please accept them." He took out a storage bag and threw it to the black-clad figure.

"Wait, I have a lightning-attribute Immortal Artifact made of Qinglei Steel, exchange it for this Lei Po Crystal." At that moment, another slightly obese cultivator also flew onto the stage, taking out a purple-green flying fork, which was surrounded by dazzling electric light.

The black-clad figure hesitated for a moment, glanced at Han Li's storage bag and the purple-green flying fork, then silently put away the storage bag and handed the Lei Po Crystal to Han Li.

"Wait, this fellow Daoist, if I guess correctly, you should want a lightning-attribute Immortal Artifact more, right?" The fat cultivator's face changed, and he quickly said to the black-clad figure.

"That's right. But you're a little late." The black-clad figure still said in a faint tone.

"Don't regret it!"

The fat cultivator was stunned, looked the black-clad figure up and down, seemingly not expecting the other party to do this, but he still turned his hand and put away the purple-green flying fork, turned around and flew back to his seat.

Han Li looked at the black-clad figure, also a little surprised, then turned into a little admiration. It was already very rare for someone to be able to stick to their word and do it to this extent, whether in the past Human Realm and Spirit Realm, or in the current True Immortal Realm.

After all, for a high-level cultivator in the mid-stage of the True Immortal Realm, as long as they are willing to spend the effort, saving up three hundred Immortal Essence Stones is only a matter of time, but a suitable Immortal Artifact is not necessarily so, especially an Immortal Artifact containing the Law of Lightning.

The other party, perhaps like Crab Daoren, was also someone who knew the value of the "Lei Po Crystal", but was a little reluctant to part with his lightning-attribute Immortal Artifact, which allowed him to seize the opportunity.

While these thoughts flashed through his mind, he also nodded to the black-clad figure and returned to his seat.

"Quick, give me the Lei Po Crystal." As soon as Han Li sat down, Crab Daoren's impatient voice rang in his mind.

Han Li didn't say much, and with a thought, he sent the Lei Po Crystal in his storage space to Crab Daoren.

Crab Daoren's body flashed with golden lightning, and the Lei Po Crystal disappeared into his body.

However, when Han Li returned to his seat, he was slightly stunned.

The seat of Shu Tiansheng next to him was empty, and this person had left here at some point.

He looked around, but there was no sign of Shu Tiansheng anywhere in the venue, it seemed that he had really left.

Han Li frowned slightly, but then relaxed.

On the high platform, the black figure waited for a moment, and when no one spoke, he picked up the box of Taiyi Yin Mud and flew down.

When Han Li saw this, he immediately stood up, and with a movement of his body, he was about to fly onto the stage.

"Are you Fellow Daoist Li?"

A clear voice suddenly came from the side, a fragrance wafted, and a figure shrouded in white light sat down, taking Shu Tiansheng's seat, it was the female cultivator who had bid a high price for the Remnant Map of the Underworld River.

"You are?" Han Li asked, frowning.

"Can I trouble you for a moment?" The female cultivator did not answer Han Li, but smiled lightly.

Han Li hesitated slightly, then sat down and nodded.

"I accidentally saw that you and the fellow Daoist who was sitting here just now traded Vermillion Cloud Fire Crystals. I wonder if you still have this kind of Fire Crystal on you. I need this item urgently. I wonder if you can bear to part with it? I will never disappoint you in terms of price. For a piece as big as a fist, I am willing to offer one hundred Immortal Essence Stones, and the more the better." The female cultivator said sincerely.

"You seem to know very well how many Vermillion Cloud Fire Crystals I have, and you also know my surname. Did Shu Tiansheng tell you?" Han Li asked calmly.

The female cultivator hesitated slightly, nodded, and said, "That's right, I just learned it from that person."

Han Li's expression did not change, but thoughts were running through his mind.

Although the Vermillion Cloud Fire Crystal is a very rare spiritual material, he has a lot of it. This item is dispensable to him at the moment, and it is not impossible to sell it in exchange for Immortal Essence Stones.

It's just that you never know when you might need it in the future, and if you sell it now, you might regret it later.

"Fellow Daoist Han, agree to her." Crab Daoren's voice suddenly rang.

Han Li's eyes flickered, and he transmitted his voice with his mind: "Why?"

"I'll tell you about this after I've completely merged with the Golden Immortal puppet. Agree to this person now," Crab Daoren said.

After saying this, Crab Daoren's voice fell silent again.

Hearing what Crab Daoren said was a little unclear, Han Li frowned slightly, but after pondering for a moment, he nodded to the female cultivator and said, "Okay, I can sell it to you."

"You are definitely making a wise decision, I'm afraid no one will be able to offer this price again." Although the female cultivator's tone was still a little cold, one could hear a trace of joy in it.

Han Li didn't say much, and brushed his hand over the storage bag.

A flash of green light passed, and he held a new storage bag in his palm, and handed it to the female cultivator.

After the female cultivator took the storage bag, she scanned it with her divine sense, and then waved her hand without hesitation, holding a storage bag in her palm, and handed it over.

Han Li took it, glanced at it, and nodded to the other party.

After the female cultivator bowed to Han Li again, she turned and walked towards her previous seat.

Han Li watched the female cultivator leave gracefully, his brows furrowing involuntarily.

Although there was a light curtain, his divine sense was too strong, and he still vaguely penetrated the light curtain and saw the blurry figure of the female cultivator, as if he had seen her somewhere.

"That's right, it's the red-clothed veiled woman who lives next door." Han Li immediately recalled.

Not only that, but the masked red-skirted woman gave him a sense of familiarity when they met before, and this feeling became stronger when they met here for the second time.

At that moment, a cultivator happened to walk down from the platform in front.

Han Li couldn't think about it, and with a flash of his body, he landed on the high platform, and directly took out some other rare materials, explaining that he wanted to exchange for the spiritual medicine needed for the Dao Pill.

Unfortunately, even at this exchange meeting, no one had these materials.

After waiting on the stage for a while, Han Li had to leave the stage with regret.

Time passed little by little, and after half an hour, when the last cultivator to take the stage came down, this underground exchange meeting finally came to an end completely.

Han Li came to the backstage, paid the Immortal Essence Stones for the blood crystal lotus root that he had previously auctioned, and completed the transaction.

After checking it slightly, he carefully put it into a jade box, put a few talismans on it, and put it into the storage bracelet.