The walls are black, the floor tiles are black, the ceilings are black, and the twelve doors are similarly black.

They were equidistant from the curved brick walls around the circular room.

In fact, there are metal light stands on the walls, and three candles are stuck on each shelf. It's just that the original blue candle flame has been extinguished, making this room deep underground and not invaded by gray fog as dark as a foggy night...... No, maybe it's darker than that, because everything here is black.

With a wave of her hand, Maca opened the barrier door of the magic elevator that could no longer open automatically, and walked in with a soft light in her other hand.

"Speaking of which, I've always wanted to come here and walk through every room, because there are still a lot of mysteries hidden here that may not be useful, but most of them are complex and interesting."

Marka led Sarah, who was following closely behind him, and as she walked inside, she said to herself:

"Look! Behind the door is the planetary chamber, which was probably built by some wizards who liked to study astronomy in ancient times, and entering it is like stepping into the starry sky of the universe. It's just that some planets are not very stable because magic has been running for too long, such as Pluto, which often explodes......"

"The room next door I think could be called the 'Brain Hall', which I think has something to do with you alchemists - there is a huge glass water tank in it, which seems to be an alchemist-activated brain, and I guess it may be another way for ancient alchemists to pursue 'eternal life'......"

"The next room......" Maka said, moving her arm to the left and pointing to the third door, "Oh, it's the Hall of Time, I've been there a few times...... I feel like a little bit of a delicate fate with me. ”

He didn't seem to want to introduce Sarah to the time hall, and he passed by with just one sentence. Soon, his finger was pointing to the fourth black door.

"That's right, it's this one." Maca nodded, "Professor Dumbledore said that there is a power that is 'more amazing and more terrible than death, more wisdom, and more terrible than nature,' and ...... It is also a very important power that is missing in your soul. ”

"Is that the 'love' you mentioned earlier?" Sarah then said.

"It's just that Professor Dumbledore called it that," Maca said, spreading her hands, "Actually, I don't really understand what it is...... I just feel that it can be 'love' but it can also be 'sin'. ”

The words fell slightly, and when Sarah heard it, she couldn't help but fall into thought, and Maca walked straight towards the door.

"I used to want to pay attention to them, but it wasn't very convenient because this was the Ministry of Magic; And then, I didn't have that free time again...... Including today, I can only take a look at this one first, and the rest will depend on whether there is that opportunity in the future. ”

With that, he reached out and gently stroked the black door.

"By the way, it's locked...... In Dumbledore's words, 'always locked'. ”

"No one has opened it?"

When Sarah heard this, she finally stopped thinking that seemed meaningless to her at the moment, and followed her closer to the door.

"To be precise, it's 'no one can open it.'" "Most of the buildings buried deep in the ground of the Ministry of Magic have been repaired and rebuilt, but the Department of Mysteries has always maintained its original appearance during the Wizards' Council. If nothing else, because this place can't be changed by modern wizards alone—including this 'locked' door. ”

As he spoke, his palm still lightly pressed against the door, carefully probing the secret of the door that could not be opened.

"Oh, and suddenly I think I should have said sorry to you." Maca said casually, "I didn't just want to replenish your soul when I brought you here, I also have my own purpose - you asked me why I didn't hide and study hard, right?" In fact, the power hidden behind this door may allow me to take a step ahead of Helmo and explore the true meaning of the soul rule - while helping you, I am also helping myself, which is what I called 'mutual use' at the time. ”

At this point, he suddenly stared at the door in front of him and winked, and then suddenly smiled.

"I see."

"Do you have a way to open the door?" When Sarah heard this, she immediately asked.

"No," Maka shook her head, "you don't have to open the door—I seem to understand that this door may just be a 'symbol'." It's as if the power here is just a 'symbol'. ”

As soon as he finished speaking, he suddenly bent down slightly, gently took Sarah's wrist, and slowly pressed the latter's palm against the door.

"Putting your hand on it, it should help you feel the 'power' there, just close your eyes and relax, don't resist, try to feel it."

After helping Sarah do all this, Maca immediately followed her and closed her eyes slightly, and the two of them stood there quietly with their hands touching the door.

Time passed bit by bit, and there was silence around, and there was no sound, as if the whole world was leaving the two of them.

Unconsciously, Sarah only felt that her consciousness, which had been clear since she was "born", was slowly blurred here.

"This ...... What is it...... Feel. ”

After a moment, Maca couldn't help but open her eyes a little and glanced at Sarah beside her. Then, he couldn't help but raise his eyebrows secretly.

"So fast?" He whispered to himself, "Well, although it is a 'flawed product', after all, it is an incomparably pure soul created by peak alchemy, and the 'door lock' will not have much effect on her. I'm more of a failed work by comparison. ”

Obviously, Maca did understand the nature of the door and the "lock" on it.

In fact, the so-called "door lock" is the "lock" that originates from the heart of everyone who stands in front of the door and tries to enter. When you think it's locked, then it's locked, and the more guarded it is, the harder it is for people to get inside the door.

And a pure and transparent soul like Sarah probably doesn't need the guidance of Maca just now, and she can enter it by accident.

But for Maca, it's a bit difficult.

"That's right, there's nothing wrong with bringing her here," he sighed as he looked at the closed door, "just missed a little...... This door may not be opened by my words...... It's the same even if you already understand how it works. ”

"Unless—"

Suddenly, he withdrew his hand and looked down at his palm.