"Naturally, if the grandfather died before getting married and having children, the father and son would not be born, so the son who killed the grandfather would not exist, and the grandfather would not die..."

This is the grandfather paradox.

Two things are mutually causal. Once one of the links is broken, the cause that caused it to be broken will no longer exist.

If there is no real "time" power in the world, then this thing is not a paradox.

In such a world, time is just something people have made up, and it is a measure of the changes in everything.

The time reversal in this world is essentially that all molecules, atoms and other substances return to their previous state, and the real inherent time or objective time is still moving forward.

In this case, even if a person returns to the state of his grandfather's youth and kills him, it will not interfere with his own existence, because he does not go back with himself.

But this is a world with magical power, time is real, and there are various powers such as souls.

In this case, there is a conflict in the timeline, and the most intuitive manifestation is the confrontation between the timelines, with the higher status covering the lower status. If the status is equal, various accidents will occur.

For example, several situations recorded by the Department of Mysteries.

This is already a very high level of magical knowledge. After listening to it, the four giants all had their own associations, but Gryffindor was the first to react:

"No, then you appear in front of us now and tell us so much..."

After this, even Ravenclaw, who was in the deepest state of thinking, suddenly woke up and looked at Adam with everyone.

"Don't worry about this, please allow me to introduce another concept, that is, the parallel world..."

After Adam's introduction, the four people realized that they were no longer themselves in the original timeline and would not interfere with the future.

"So, you took us out of the original timeline and told us this, for...?"

Slytherin narrowed his eyes and looked at Adam.

You crossed two thousand years to come here, and what parallel world, you can't just come to tell me about my black things, right?

"Oh, that's it."

Just now, I was so fascinated by the show that I almost forgot the business. Adam quickly explained his idea of ​​taking the four to two thousand years later to help Hogwarts promote the wizard's technology tree.

"Teach students more knowledge and do research? No problem!"

Ravenclaw was the first to agree:

"By the way, we can see what Hogwarts will be like two thousand years later."

Anyway, she has no descendants in the normal timeline, so Hogwarts is her only child left, so of course she wants to go and see it.

Then came Gryffindor and Hufflepuff. Gryffindor thought it was cool to be able to go two thousand years later, and Hufflepuff also wanted to see what Hogwarts would be like in the future with a Hufflepuff as the headmaster.

Slytherin was silent for a long time.

On the one hand, with Adam's introduction, he already knew that there were almost no real pure-blood wizards in Hogwarts two thousand years later, even Slytherin College.

On the other hand, based on Tom Riddle's great achievements that Adam just mentioned, he felt that he would not have a bad reputation if he went to two thousand years later, right?

Although he didn't care much about such external things, the four friends who went together, the other three were loved, and he was the only one who was despised, that scene made people feel miserable.

"If you are worried about this, you can rest assured that no one will resent you because of Voldemort."

Adam comforted.

Merits cannot offset faults, and faults cannot cover up merits. Slytherin's contributions have always influenced future generations, but he did not leave any real faults. He broke up with the other three and only left alone.

And the pure-blood theory was not proposed by Slytherin, and those wizards who insisted on the pure-blood theory knew why they were doing it. It would be too flattering to say that they continued Slytherin's legacy.

As for the basilisk that was left behind... the basilisk that had been sleeping for a thousand years, in fact, the only person who was killed was Myrtle, and it was Voldemort who ordered it.

Under Voldemort's overly powerful personal style, no one in the wizarding world would attribute the people he killed to Slytherin. No one would doubt that he would still kill people and make Horcruxes even if he didn't have a basilisk.

Slytherin: ...

After listening to Adam's comfort, Slytherin expressed mixed feelings, so the backup plan he left in the original timeline was just a waste of time?

Thank you, kind-hearted person. I feel much cooler after being comforted.

But anyway, Slytherin chose to go to the future with Adam under Adam's comfort. After all, he helped build Hogwarts, and he wanted to see it no matter what it became.

"Huh? No, you snooped into my mind?"

Slytherin suddenly realized that he had not said it before, but Adam knew what he was thinking:

"You can actually snoop into my mind?"

As an extremely outstanding telepath, Slytherin's brain occlumency is naturally superb, but Adam still snooped into his mind?

Adam waved his hand naturally:

"This is nothing special, it's just the basic quality of the headmaster of Hogwarts."

The Big Four:...?

Legilimency is the basic quality of the headmaster? What has Hogwarts become two thousand years later?

"Oh, by the way, since you all agree to go to two thousand years later, I can tell you more specific things so that you can understand and integrate into Hogwarts two thousand years later."

While speaking, Adam looked at Slytherin:

"Of course, this is mainly about Tom Riddle."

Slytherin: &%*#￥!

You kid, you're not done yet, are you?

What sin did he commit to have such a descendant!

"Let's start from when he was studying at Hogwarts. He showed extraordinary talent since he was a child. In the restricted area of ​​Hogwarts, he discovered a magic called Horcrux..."

Adam started from when Tom Riddle knew about the existence of Horcruxes, and said that he used the killing of Myrtle to make the diary into the first Horcrux, and then used the killing of his uncle to make the Gaunt family's head ring into the second Horcrux.

"Head ring?"

Slytherin frowned. He didn't have any rings as a token of love. Maybe it was made in the future?

"No, it was a treasure that the Gaunt family got later."

Adam took the time to explain.

Slytherin, who had just strengthened his brain block, twitched his face and silently used all his strength to operate the brain block, and even his eyes became a little empty uncontrollably.

Then Adam talked about Tom Riddle's discovery that the ghost of Ravenclaw College, Ms. Grey, was actually the daughter of Ravenclaw himself.

Relying on sweet talk, Tom Riddle tricked the other party into revealing the whereabouts of Ravenclaw's diadem and made it into the third Horcrux.

"Salazar Slytherin--!!!"

Ravenclaw's physical critical hit knocked Slytherin out of the brain block state.