the next day.

Du Di'an came to the tailor shop, received the robe and mask, put on the robe, the size was just right, he put on the mask, and came to the alley of Wall Street, and suddenly smelled the smell of two people inside, more than yesterday One less person.

"Sure enough, it's here every day." Du Di'an secretly said, entered the alley and put on a mask, stretched out his hand to hold up the cloth that was smeared like a wall, and saw that there were piles of bricks inside, if ordinary people accidentally noticed this cloth, even if you open it, you will only see this wall, but Du Di'an knows that it is a secret room, so he can see the gap between these bricks at a glance.

Du Di'an picked up a stone and tapped it twice.

There is no reaction inside.

Du Dian tapped twice again.

At this time, Du Dian smelled the smell of the two people inside and approached, just behind this block of bricks. He waited for a while, but didn't see them making a sound, and immediately beat twice, controlled his throat, and lowered his voice: "I am your companion, and I have no malicious intentions. I am also an alchemist, seeking to organize..."

The two behind the bricks seemed to be thinking, but after a while, there was still no response.

Du Di'an suddenly smelled a strange smell, he frowned slightly, and slowly pulled out one of the bricks.

Whoosh!

Just as the brick was pulled out, something was shot out of the gap.

Du Di'an was prepared and avoided in time, but after the thing fell on the ground, it sputtered out, and a few drops fell on the edge of his robe. The black-dyed robe was corroded and turned white, it was sulfuric acid.

Du Dian glanced at it, turned back to the brick, and continued: "I have no malicious intentions. If it was from the Holy See of Light, I would have notified the Knights of Light to arrest you. I am your companion."

The two of them didn't seem to expect that their sneak attack didn't work. When they heard Du Dian's words, the two also knew that the initiative was in Du Dian's hands at this moment. If they were notified of the Holy See of Light, they would soon be surrounded and suppressed.

"How can I trust you?" A female voice came from inside.

Du Dian asked back: "How can you trust me?"

There was a little silence inside, and the woman said, "Please show your alchemy tattoo."

Du Di'an smiled bitterly: "Then let me in first, it's too unsafe here, and it's easy to attract attention after staying for a long time."

Hearing this, the two of them seemed reasonable and slowly pulled the bricks out. The light inside was dim, but Du Di'an's vision was not affected in the slightest. Judging from his stature, he was a child of his age, a boy and a girl, and the boy he had tracked down before was not there. At this moment, the girl was in charge of pulling away the bricks, while the boy was hiding in a darker place, holding a glass bottle in his hand that still had half a bottle of sulfuric acid in it.

"Come in," the girl said.

Du Dian nodded and jumped in. There was a staircase under the brick, and the place sealed by the brick was like a ventilation window.

There was a pair of vigilant eyes in the boy's mask, staring at Du Di'an, and said, "Now you can show your alchemy tattoo."

Du Dian nodded slightly, raised his black robe, revealing the black cross tattoo on his chest, and said, "Can you see it?"

The girl took a closer look and said, "It's ours, come with me."

Hearing this, the boy breathed a sigh of relief, greeted Du Di'an, and followed behind the girl.

Du Di'an followed them down the stairs and came to a secret room at the bottom. I saw that the secret room was very spacious, with many shelves inside, with all kinds of mineral powder or metal powder on it, and there were no animal remains, or eyeballs. As for the biological part, as he expected, they are all from the "Sage's Stone" faction, intending to refine this magical stone.

"Please come here." The girl came to a table and said.

Du Di'an followed his words.

"I want to look at your tattoo again." The girl said the dim light in the previous corridor made her not fully see it.

Du Dian nodded, revealing the black cross on his chest.

The girl and the boy approached, looked carefully, and confirmed that it was a black alchemy tattoo. She suddenly approached Du Di'an's chest, sniffed lightly, and the warm breath exhaled from her nose made Du Di'an's chest throb slightly.

"Perfume smell?" The girl was a little puzzled, and after smelling the robe of Du Di'an's arm, she couldn't help but look up at Du Di'an and said, "You are a boy, how can you apply perfume?"

Du Dian coughed dryly and said, "I'm used to it."

The girl glanced at him strangely, but said nothing, and said, "How did you find us, we should hide it very secretly here, and the secret code is known only by our people, even if you are an alchemist, won't recognize it."

Du Di'an said truthfully: "I saw a man in the market with a hook tattoo on his wrist, and then followed him to find it."

The girl and the boy looked at each other and said angrily, "This stupid 'mouse' has told him a long time ago that the tattoo on such a prominent part of the wrist is simply courting death, and I don't know how his teacher taught him in the first place!"

The boy who was walking with his parents on a certain street at the moment suddenly sneezed two times in a row with a blank expression on his face.

Du Dian said sincerely: "Can I join you? Do research together."

The girl looked at him and said, "Don't you have your circle? Didn't your teacher teach you? Our circle rarely accepts other unfamiliar companions."

"My teacher is dead." Du Di'an said with a sad expression: "Several companions who did research together before have also disbanded."

The girl froze for a moment and whispered, "I'm sorry, I didn't mean it."

Du Dian shook his head slightly and said, "It's all over."

The girl thought about it and said, "Well, if you are alone, you can join, but you must not bring outsiders in. You also know that the more people there are, the easier it is to be exposed."

Du Dian was full of surprise, and said, "I will keep it a secret."

"Yeah." The girl nodded with a smile on her face, and said, "My name is 'Nightingale', his name is 'Viper', the mouse went shopping with his parents today, and he didn't come, if you want to join us, you can afford one. codename."

Du Dian couldn't help but wonder and said: "Isn't the code name granted when you join the Dark Holy See?"

"Yeah, that's the official code name, and it's the status symbol of our alchemists." Nightingale nodded and said, "But we also need a code name to address each other. It's impossible to use our real names. In case anyone gets arrested, What if you expose other people? Could it be that you used your real name in your previous circle?"

Du Di'an continued: "No, it's all replaced by one of the words in everyone's name."

"That's also a code name." Nightingale said, "We're using an animal instead, think about it."

Du Di'an thought for a while and said, "Let's call it a hound."

"Hound?" Nightingale nodded and said, "Okay, I'll call you a hound from now on."

Du Dian nodded, looked around, and said, "Don't you have a teacher to teach you?"

Nightingale shook her head and said, "My teacher won't come to a place like our apprentice alchemist. He is busy with his experiments."

The boy named Viper smiled and said to Du Dian: "Nightingale is our teacher. She is the one who is about to hit the Meteorite Badge. By then, she will be the youngest one-star alchemist, isn't she amazing?"

Du Di'an looked at the girl in surprise. From the moment she came in, she felt that the girl had more power to speak. Sure enough, she was the leader in this small circle and said: "That's amazing, I've only been in contact with you for a while, and I have to talk to you a lot. study."

The voice under the mask of Nightingale was a little shy, and said: "How can he exaggerate what he said, there are too many smart people, I can't be regarded as the youngest."

"Anyway, I think you are very powerful." Viper said with a smile.

Du Di'an looked at him and wondered how this person's personality had anything to do with the "Poisonous Snake". This code name is a bit of a split personality.

"Okay, it's time for the experiment, do you still want to get the Meteorite Badge?" Nightingale waved.

The poisonous snake laughed, came to another room next to it, and closed the door.

Nightingale said to Du Dian: "We have limited rooms here, and there is a grocery room next to it. You can use that after cleaning it up. If you don't understand anything, you can communicate with me at any time."