On the topic of time rewinding, both Muggles and wizards have had quite complex explorations and researches, but in the end, no one has been able to come up with a definitive conclusion.

As a former Muggle, Maca was not a scientist and was unaware of the Novikov principle of self-consistency and a series of other regular inferences about the paradox of time; And now, as a wizard, he is also far from being able to touch the rules of time, let alone understand the mystical magic of them.

Even though he had even met his future self once, even if he had seen his future self die in front of him, he still failed to accurately estimate the true horror of the rules of time.

Now with a time turner, he knows only one thing - going back in time is a huge burden, and if the time goes back for more than five hours and twenty-three minutes (1), the human body will be damaged.

This rule is not the conclusion of any theoretical research, but the wizards who have used the time turner in previous years have tested it with a piece of fresh life.

If you look at the situation of the self who met the future at the beginning, this rule without the slightest theoretical basis seems to be impossible to ignore.

But what can you do with more than five hours?

Maca didn't know, but she couldn't afford him to think about it now. He had to use the time turner right away, and when he did, it wasn't too late to think about it.

After placing the four extra converters in his waist pocket, he quickly hung the gold chain of the converter left in his hand around his neck and began to flick the small hourglass in the middle of the golden ring.

At the moment when Maca began to turn the hourglass, there was a loud "bang" in his ears, as if someone had riveted enough strength to ring the broken gong in his ear.

The intense discomfort made him frown, but his hand did not stop.

As the little hourglass turned, everything around him seemed to be covered with an inexplicable haze. The fog was not thick, nor was it colorless, but it made it impossible for him to see anything around him.

Then, when a large number of colorful objects entered his field of vision, he finally understood what the "four-dimensional vision" that his future self had mentioned at the beginning was all about.

While time continues to go back, the colorful things that appear in front of him are also constantly growing and extending...... Stretching from behind him to the front, and then from the front back behind him, it swirled endlessly, leaving long winding strips in his eyes.

Maca guessed that those long strip-shaped objects should be one by one. That's what human beings look like in the four-dimensional world, that is, the so-called "disgusting long worm" in the mouth of the future self.

If the spatial position of someone at each point in time is fixed, such a scene will be formed.

But since human beings exist like that in the four-dimensional world, what would they be like when they were using a time converter?

He quickly turned his head to look at the hourglass as he continued to flip the hourglass.

No, there was nothing behind him. In other words, as a time traveler, I am not only free from time constraints, but also fixed to the original spatial coordinates.

But if that's the case, when the moment he stops turning the hourglass comes, he'll obviously be in a universe of nothingness, right?

Even if he didn't learn any complicated theoretical knowledge, he knew that the earth was rotating all the time. And it's not just about rotation, it's still revolving around the sun!

If you think about it any bigger......

No, before he could continue to diverge his mind, the hourglass had already turned five times. Maca hurriedly put away what she had in her head, and her hands immediately stopped moving.

Suddenly, his vision shook violently, and his whole body twisted. Immediately, he realized that he was no longer in the Time Hall of the Department of Mysteries.

After a quick glance around, he realized that he was standing on a small hill near Hogwarts!

“…… Was that the feeling of apparition just now? Maca thought for a moment, then nodded again.

Perhaps, the whole body distortion that appeared at the end should be the Phantom Shifting Charm.

The unpleasant experience of stretching and flattening the whole person into a tube should be a similar way of moving in space, if not the illusion itself.

After a little thought, he affirmed this and realized that his previous worries were completely unnecessary. What's more, it's not like no one has used the time converter, he's just thinking about it himself.

Time regression does not fix the traveler to a spatial coordinate, but regresses with the turn of time. At the end of the backtrack, the traveler will be moved by the time turner to the vicinity of their own location at that point in time, in order to detach themselves from the coordinate point they were in in the past.

After putting aside these messy questions of space-time relationships, Maca couldn't help but sigh. Because he found that even though he had already experienced time travel once, he still didn't know the point. It is conceivable that the rule runes about time are far from being accessible to him now.

Is this a second-order rule? No, this is definitely the depth that only a few third-level rule runes can reach.

Although there is a certain strong desire for this esoteric knowledge, it is clear that this is not the time to think too much. It should have been past 4 a.m., and in less than four hours, Voldemort and Greenwald would be in the mirror.

There wasn't much time left for him.

Voldemort didn't have to think much about it, Greenwald was the target he had to deal with. Even if the counter never seemed to have targeted malice, he had to stop the counteract.

But where Greenwald was now, he had no way of knowing.

With a time-turner around her neck, Maca could hear a slight but clear sound in her ears ringing continuously, "clicking" and ringing, with a clear interval.

The sound seemed to remind him that time was moving mercilessly towards that terrible future.

And the first thing he could try to do at the moment was to evacuate the crowd in the castle.

However, as soon as Maca's right leg took a step, the whole person immediately froze. The clock ticked by, and he couldn't take the second step.

“…… Can't pass. ”

Yes, he can't pass. Because he found that if he entered Hogwarts at this point in time, he would definitely be aware of himself at this point in time.

What would happen if the past self discovered the future self?

Maca, who had experienced a similar situation firsthand, suddenly fell into a hesitation. He couldn't be sure whether the death of his future self at that time was due to this reason; He was also unsure if the spherical three-dimensional rune array also had the function of preventing this from happening.

I remember that Dumbledore had told Hermione that in time travel, you need to avoid being exposed to other people's eyes as much as possible, especially your past self.

At this moment, Maca couldn't help but feel distressed for the first time about her ability to sense magical power.

It wasn't until he froze in place for more than ten minutes that he realized the difficulty of being a time traveler. A shackle called "rules" had been heavily placed on him, a rule-violator, and he had the illusion that he could not move an inch.

It was only at this time that he realized how hard it took for the old Maca who died in front of him to break the indestructible shackles and come to him.

Now he didn't even dare to say that he understood anything, he just guessed that there must be countless problems in it that he didn't understand. And in order to solve these problems, he will have to give at least his life.

After confronting his own jealousies for a long time, he sighed blankly.

While lamenting that he had sighed a lot lately, he had to put those unknown dangers in the first place, and began to plan the next step on the premise of avoiding the worst situation as much as possible.

There were so many things he didn't understand, and a mere rule of time was so much more complicated and cumbersome than all the subjects he had studied so far that he had to force himself to be extremely cautious.

If you take a wrong step and die in the past, there is nothing to be done.

Maca looked around again, and the snowy night and cold air lifted his spirits. But no matter how refreshing he was in the environment, he couldn't suppress the boredom in his heart.

After a moment's hesitation, he simply waved his hand to sweep away a cloud of snow and sat down on the floor.

Hogwarts was not far away, but he didn't dare to get any closer. Endless worries kept him from moving forward again and again, and even though those worries might have been just empty speculation, he still struggled to move forward.

"Now...... I should still be checking the rune array in the vestibule of the castle, right? He thought about it secretly, then shook his head with a wry smile, "It's completely in vain. ”

In this way, Maca pondered for two hours on the snowy slope near Hogwarts. When a layer of gray light faintly appeared on the eastern hills, he realized that the dawn had already arrived unexpectedly.

"In that case, just intercept Greenwald on the periphery of Hogwarts!"

Looking at the castle that was gradually becoming clearer in her vision, Maca nodded silently and took out his staff. Calculate the time, and wait a little longer for Dumbledore's funeral to begin.