My Black Magic Is Too Good, It Can Be Automatically Whitened

At Dunn's request, Dumbledore changed the settings of the Mirror of Erised.

A normal person standing in front of a mirror will only see what he desires most in his heart, but when what a person desires in his heart is a secret passage leading to Hogwarts Castle, the entrance to the secret passage will automatically appear.

It's a pretty neat setup.

If you don't know the mystery, you will never find the entrance to the secret passage.

Dumbledore wanted to be the first to try his masterpiece, and Dunn had to accompany him from the secret passage back to the Panda Bar.

This time, in order to save time, both of them rode on broomsticks.

Nagini was surprised by the return of the two, but after seeing the magic of Erised's Mirror, she also admitted that it was indeed a brilliant idea to increase the bar business while hiding the entrance to the secret passage.

The Mirror of Erised was left in the Panda Bar.

Dunn and Dumbledore didn't go through the secret passage any more, and simply Apparated back to the Hogwarts hunting grounds and returned to the castle together.

On the way back to Gryffindor Tower, Dunn had been thinking about Nagini's wand.

Aberforth should have never done a serious cleaning of the bar in the decades of running the pig's head bar, and Nagini, who took over the bar, brought a lot of trouble.

The effect of the descaling spell is not ideal.

On the one hand, there is too much dirt, and on the other hand, because Nagini does not have the help of a wand, the effect of the spell is greatly reduced.

This is still when her own magic power is far beyond that of a normal wizard.

When Dunn and Dumbledore left, Nagini was still wrestling with the dirt on the floor, and it was a big job to clean it up completely.

Dunn decided not to wait any longer, and immediately went to the back room to get the basilisk's horn and help Nagini make a wand.

The entrance to the secret room was in a girls' bathroom on the second floor of the castle, but obviously, that was not the original entrance to the secret room.

The original use of the secret room was probably just a private laboratory prepared by Slytherin for himself, but later he left Hogwarts alone because he disagreed with the other three founders' admissions philosophy.

Before leaving, Slytherin closed the chamber, leaving the basilisk.

His purpose is not necessarily to have his successor use the basilisk to clear the non-pure-blood wizards in the school, but more likely to keep the basilisk as the guardian of the secret room.

In case the secret room is accidentally discovered by others, obtain the magical inheritance left by Slytherin.

And the existence of the secret room is not really unknown, Slytherin may hide it from the other three founders, but it will never hide it from his direct blood descendants.

At least the Gaunt family has always had records of the Chamber of Secrets.

But the Gaunt family did not really enter the Chamber of Secrets, although many of them used to go to school at Hogwarts.

This is definitely not out of reverence for the ancestors, it is more likely that they do not know where the entrance to the secret room is.

Slytherin left the information of the secret room, but he didn't want the incompetent guys in the descendants to get the contents of the secret room, so he deliberately didn't tell the descendants where the entrance to the secret room was.

This is a test.

As a mechanism set up by Slytherin himself, the entrance to the secret room is of course not so easy to find.

Dunn couldn't figure out why the entrance to the secret room was in the women's bathroom on the second floor.

You must know that in the era when Hogwarts Castle was built, there was no distinction between male and female toilets.

But it would be wrong to say that the entrance was built later.

The entrance of the secret room is engraved on the tap. If it was built later, it means that the secret room has been discovered before.

And the settings that can only be opened through Parseltongue, at first glance, are left by Slytherin.

Putting these two contradictory things together, Dunn has a very bold guess about the existence of the entrance to the secret room.

The entrance to the Chamber of Secrets is not fixed.

This non-fixation does not mean that the location of the entrance will change, but that the appearance of the entrance will change.

In different years, the entrance will look different.

And this change depends on the change of the castle itself.

If it weren't for that, Hogwarts Castle's plumbing would have been remodeled so many times that the Chamber of Secrets would have been exposed long ago.

The principle is the same as the House of Requirement.

Dunn even suspects that the Chamber of Secrets is actually just another Room of Requirement.

Even if not, there must be some kind of similar or figured out connection between the two.

To test his guess, Dunn made another trip to the Room of Requirement on the eighth floor of the castle.

"I need an entrance to the Slytherin Chamber of Secrets々..

I kept this thought in my mind.

The next second, a door appeared on the wall of the Room of Requirement.

It is exactly the same as the door of the girls' bathroom on the second floor, even the sign on the door is the same.

Push the door and enter, there are three toilet compartments and corresponding sinks.

Dunn had never been in the girls' bathroom on the second floor, but he was sure it was exactly the same inside.

On the copper faucet of the sink on the far left, Dunn saw a small snake carved into the side.

Turn on the faucet and there is no water in it.

The other two faucets can discharge water normally.

The entrance to the secret room is indeed here.

Dunn made a strange sizzling sound at the little snake on the dragon's head.

"""Open! 99

In the dazzling white light, the faucet began to rotate rapidly.

Then, the entire pool moved.

As the sewer pipe continued to expand, the pool slowly disappeared, revealing a huge water pipe with a diameter of more than one meter that led diagonally down.

Dunn did not choose to enter the secret room immediately, but waited for a few minutes, watching the water pipe shrink and return to the appearance of the sink again.

Leaving the Room of Requirement, Dunn went to the second floor of the castle.

Thanks to Dumbledore persuading the headmaster and three other deans to make Dunn the class representative, he has the authority of a prefect to enter the girls' bathroom under the guise of checking violations.

But I didn't expect that this remote bathroom was actually used by someone.

Dunn was stunned to see Ella and a girl with two ponytails in glasses coming out of the bathroom.

Ella was also surprised.

The two stared at each other, until the girl with glasses next to Ella spoke timidly.

"Are you sure this is the girls' bathroom, we're not going the wrong way?

Ella glanced back, the sign on the bathroom door was very clear.

Dunn shrugged regretfully.

"Looks like I'm looking in the wrong place. 35

Turn around and leave.

Ella explained a few words to the girl with glasses and caught up from behind.

"Elizabeth was teased by a Slytherin boy in the auditorium and left crying, and I ran after her to comfort her. Did you just want to go into that girls' bathroom?

"Elizabeth?"

Dunn thought the name was a little strange, and he didn't remember this class of freshmen with that name.

Ella explained:

"That's her middle name, her full name is Myrtle-Warren."