"Roger, is this correct?"
"I think it's fine."
"Warp drive, engage!"
"Ugh... Ahhhhh!"
The previous night on the Moon had been a joyous occasion for all. The professors had each gained something from their time there and were in good spirits.
Except for Dumbledore, who was still worried about Voldemort, and Hagrid, whose idea of being the 'God of Magical Creatures' had been rejected by Roger.
What pleased the professors wasn't just seeing an alien landscape, but also that Roger had constructed a small landmark on the far side of the Moon.
Dream Shadow could be triggered by a 'beacon' of thought. This beacon could be a person, or it could be a unique building.
This meant they could not only visit today, but any day in the future, as long as they thought of the unique appearance of this structure while sleeping, they could come again.
Compared to other wizards, the professors now had an entirely new field to research, which would greatly benefit their magical paths.
In Muggle terms, from now on, the professors could casually touch things on the Moon and come up with a significant paper.
The day after the professors departed, Roger and Harry began their return journey.
Harry, however, did not expect the return trip to be completely different from the journey there! Harry's complexion was terrible at the moment.
This was because on the way there, Roger had used a more traditional nuclear-powered magical engine to generate thrust and achieve escape velocity.
But on the way back, since the spacetime coordinates were already known, Roger's choice was to directly Apparate with the alchemical rocket!
Apparition wasn't like Dream Shadow; as long as there was a beacon, one could go anywhere in the universe with a thought.
As a form of Space Magic, it still followed some basic 'equivalent exchange' principles.
The distance of Apparition was directly proportional to the 'paid' Mental Power, and if the distance was too great, the required power would increase exponentially.
Roger wasn't teleporting from the Moon to Earth in an instant, but rather "blinking" towards Earth through a series of spatial jumps.
Since they were in outer space, it would be a shame not to have some 'superluminal' travel.
Roger was having a blast, but Harry's experience was quite unpleasant.
The sensation of using Apparition was terrible, like being shoved into a tiny pipe and then squeezed out.
After some adaptation, wizards could overcome some of this discomfort.
But Roger's continuous use was too much.
"Harry, you still need to practice this." Before Roger could even complete his spatial jumps into Earth's orbit, Harry couldn't take it anymore, and Roger had to stop to let Harry recover.
"In the future, wizards' battles will surely involve spacetime dimensions. You can't leave yourself with such a weakness."
"..." Harry was too uncomfortable to even speak at this point.
They continued on this bumpy journey, and when Roger and Harry returned to Earth, according to Roger's calculations, the time taken was significantly shorter than the journey there.
This was true even with Harry's several mid-journey breaks.
However, the results of what Roger wanted to test were somewhat unsatisfactory.
"There's still a slight deviation in the spatial teleportation. Is it caused by the Earth-Moon movement, or by magical interference..."
Regardless of the cause, Roger believed that building a Floo Network spatial channel between the Earth and the Moon would not be an easy task.
He had a premonition of danger, and even if spatial teleportation deviated, it wouldn't be fatal. He could see the real danger before it even appeared, but others wouldn't be so lucky.
If a deviation occurred, who knew where they would be teleported, or if they would be teleported in pieces.
"Besides Interstellar Communication technology, we also need Interstellar Navigation technology. Hmm, I'll put this on hold for now."
Dream Shadow had uses in many other areas besides interstellar information transmission, so Roger didn't mind spending more time researching it.
However, for interstellar navigation, Roger felt that this technology wouldn't bring him much benefit at his current stage.
Even if he developed it, neither Earth's technological civilization nor wizard civilization had the basic conditions for interstellar colonization yet.
Roger's own time was also very precious; he couldn't spoon-feed everyone.
While initial nurturing could involve some effort, some paths ultimately had to be walked by themselves.
.
.
.
England, London, Privet Drive.
They had taken off from Greece, but Roger chose to land directly in England.
According to their prior plan, they would part ways here, and their next meeting would be on Platform 9 and 3/4 at King's Cross Station in about half a month.
Roger would be proceeding alone for the rest of his trip in Britain.
"Harry, take this." Roger took out a sandglass-shaped alchemical item from his pocket.
Harry took it. He knew what it was; Roger wore an identical one around his neck.
Unlike the one in his hand, the one Roger wore around his neck was always active.
"You've studied a lot about Time Magic, so you know what's possible and what isn't. I won't lecture you further. I'll see you after the semester begins," Roger said to Harry with a smile.
"Okay, see you after the semester," Harry replied, smiling as well, clutching the Time-Turner Roger had given him.
With not much time left until the semester started, Harry didn't feel any sadness about parting.
Why give Harry a Time-Turner?
It was, of course, because of Lily's Love's Magic left to Harry.
Harry wanted to research this magic now, and Love's Magic required Harry to spend a certain amount of time with his loved ones each year to 'recharge' it.
Otherwise, its power would continuously weaken until it disappeared.
And now, with over half a month until the semester began, Harry hadn't spent enough time with his aunt's family.
But the miraculous power of magic could solve this problem.
Not enough time spent together? Then use a time loop.
By continuously using the Time-Turner, a week could become a year! However, because time travel itself was dangerous, it wasn't recommended in normal circumstances.
It was only because Harry understood Time Magic that Roger felt comfortable entrusting him with the Time-Turner.
...
Standing at the highest point in London, Roger looked down at the world below.
The endless stream of people, vehicles, magical beings hidden among humans, and wizarding residences that had carved out their own territory using the Confundus Charm.
Everything was visible to Roger.
But what he wanted to see wasn't this; he desired a deeper dive into history, to witness the true grandeur of ancient, powerful wizards.
He thought of the four founders of Hogwarts, Slytherin and Gryffindor, and even older eras, like the world-renowned wizard, Merlin!
But it was completely different from when he was in Greece.
Just as his attempt to create moon rabbits on the Moon had allowed him to discover more potential in Conceptual Creation, Using the Time Phantom Shuttle Spell in Britain made Roger realize that this seemingly harmless Time Magic also possessed an extremely dangerous side! It wasn't just the Time Phantom Shuttle Spell; the Time Cinema Spell also carried considerable risks.
Ultimately, they wielded the power of time. Just like steel, even when forged into a wok for cooking, it could still be used to kill!
"Merlin..." Roger held his wand, gaining a deeper understanding of the power of wizards in this world.
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