Starting as a stray dog, I embarked on a journey of cultivation.

Afterwards, Geng Jizi led Shen Yu into the room next door, while Gou An waited by drinking wine.

Although he couldn't go in to see how the other party operated, Gou An pricked up his ears to listen inside.

Before long, a series of clanging and clattering sounds came from the room, as if various objects were fighting each other, indicating a very busy scene.

Anyone who didn't know better would think that Shen Yu was being tortured after she went inside.

The process didn't last long; soon the sounds in the room stopped, and then the door was pushed open.

Geng Jizi came out first, blew on his bangs, and looked satisfied.

However, Shen Yu did not come out with her, which made Gou An very curious.

"Elder, where is Shen Yu?" Gou An asked curiously.

Geng Jizi sat down on the side, picked up his wine glass, took a sip, and said with a smile, "Don't worry, I used shaping ointment and a magic array to modify his appearance. He's currently inside waiting for the shape to stabilize and can't move yet. We'll have to wait a little longer."

"I see!" Gou An sniffed the air. If he could still smell Shen Yu's scent, he would have been worried that something had happened to the boy.

Then Gou An smiled and said to Geng Jizi, "Elder, that mask you took out earlier was quite interesting. I wonder how many spirit stones it would fetch if you were to sell it?"

Upon hearing that Gou An wanted to buy this item, Geng Jizi immediately smiled and said, "Since you want it, I certainly can't charge you an exorbitant price. Seven or eight thousand will do!"

Gou An's lips twitched. Seven or eight thousand wasn't considered a high price?

This mask only changes one's appearance and has no other effect.

Perhaps seeing Gou An hesitate slightly, Geng Jizi added before Gou An could speak, "However, considering our relationship with Fellow Daoist Shen, seven or eight thousand won't be necessary. I'll give you a big discount."

"How much?" Gou An asked.

Geng Jizi immediately extended five fingers.

"Five thousand?" Gou An asked curiously, as it was roughly in line with his desired price range.

I am not short of spirit stones right now, but I can't make it obvious.

As the old saying goes, wealth should not be flaunted.

If people find out that you're a nouveau riche, you're likely to run into trouble.

"No!" Geng Jizi shook his head and said, "Five hundred spirit stones will do. I'll just charge you the cost price."

"Huh!" Gou An was stunned. The difference was too great.

Once Gou An came to his senses, he quickly took out five hundred spirit stones to complete the transaction.

Geng Jizi accepted the spirit stones and handed the mask to Gou An, reminding him, "Although this item can change your appearance, your expression will be a little stiff. Don't make any big expressions after disguising yourself, or you'll easily give yourself away."

"Then, while this item can change one's appearance, it cannot alter one's aura."

At this point, Geng Jizi smiled slightly and said, "Especially since you can't conceal your demonic aura, you'll have to rely on yourself in this regard."

"..." Upon hearing this, Gou An immediately stopped fiddling with the mask in his hand, looked up at Geng Jizi, and asked, "What do you mean by that, fellow Daoist?"

Gou An's mind immediately went into high alert.

"Actually, I could tell from the beginning that you were a demon, fellow Daoist." Geng Jizi smiled slightly.

Gou An silently put away his mask, and only felt slightly relieved after seeing that Geng Jizi didn't make any other moves. Then he asked, "Is it that obvious?"

"Actually, it's not that obvious." Geng Jizi smiled and said, "Your demonic aura is perfectly concealed, and your transformation technique is also quite good, enough to fool ordinary cultivators."

"Then how did you figure it out, Elder?" Gou An asked curiously.

"Simple!" Geng Jizi pointed to his eyes and said, "You can tell just by looking at them."

"You can tell just by looking at them?" Gou An was even more puzzled.

"Ordinary eyes certainly won't do." Geng Jizi smiled, then pointed to his own eyes and emphasized, "I've been practicing weapon crafting since childhood, and these eyes of mine have long been extraordinary."

Gou An squinted at Geng Jizi's eyes, trying to see what was different about them.

Then I noticed that the fat guy seemed to be cross-eyed, and there was a clump of eye boogers in the corner of his eye that he hadn't cleaned.

They looked like ordinary eyes, nothing special, and the fat man's cultivation level was only at the Golden Core stage.

"Elder, are you trying to trick me?" Gou An asked curiously.

Geng Jizi laughed and then said, "You saw through me."

He laughed as he reached into his pocket and pulled out a pendant, then said, "Actually, it was this pendant that sensed it."

"This item is called Mingxie Jade Pivot."

Geng Jizi held the pendant in his palm and began to introduce it. It was a dull gray jade pendant with fine, swirling dark patterns engraved on its surface, looking quite unremarkable.

"It's a little gadget I made in my spare time years ago, with a built-in sensing array. Whenever demonic energy, evil energy, or malevolent killing intent gets close, the jade pivot will automatically heat up and vibrate to warn me."

"As soon as you landed on the island, it started to get slightly warm, and that's when I realized that you are not human."

"Although you have concealed your aura perfectly, it is not airtight. While cultivators may not be able to detect it, many magical treasures and formations can still identify it."

Gou An's gaze fell on the Mingxie Jade Pivot, and he thought to himself, "So that's how it is."

Geng Jizi put the jade pendant back into his arms and chuckled, "That's why I reminded you earlier, fellow Daoist, that the mask can only change your appearance, but you still need to conceal your demonic aura. Otherwise, if you accidentally enter some magic array or encounter certain magical treasures in the future, you will still be easily exposed."

At this point, he suddenly changed the subject, a businessman's glint in his eyes: "Speaking of which, since you need to conceal your demonic aura, I happen to have a magic treasure that is specifically designed to conceal the aura of a demon cultivator's origin. I can sell it to you as well."

"Once worn, even a human god-level expert cannot detect the slightest trace of demonic energy, and it can also deceive any identification magic weapon."

Gou An raised an eyebrow, immediately showing interest: "Oh? There's such a treasure?"

Geng Jizi nodded, reached into his storage bag, and pulled out a pair of red underwear: "This is it."

"This..." Gou An's lips twitched wildly, unsure whether Geng Jizi was joking or serious.

Geng Jizi, holding the underpants, continued, "I have already inscribed runes and magic arrays on this item. Once you wear it, it will form a close-fitting air membrane around your body, which can completely conceal your demonic energy."

"Moreover, the magic array of this item is powered by demonic energy, so it can operate automatically as long as it is worn, without any consumption."

"Most importantly, this item can not only perfectly conceal demonic energy, but also mimic the circulation of spiritual energy in human cultivators."

"In other words, when faced with those magical artifacts that identify demons, it can help you perfectly deceive them. Combined with the mask I just sold you, as long as you don't actively reveal your demonic form, no one will be able to detect you."