Calvin didn't pause for a moment, and said without hesitation: "Yes, I heeded your warning, did not continue with practical research, and only raised some theoretical possibilities, but Nicol told me that at Hogwarts, you can get safe research materials and not degenerate into a dark wizard." ”

Unlike Voldemort, who pursued powerful magic, Calvin's dedication to magic was reflected in the search for the origins of magic. When he addressed the issue to Dumbledore in his letter, Dumbledore immediately pointed out that it was best to stay away from this dangerous issue as soon as possible, and not to try to find the origin of magic.

However, his teacher, Nicola May, encouraged him to persevere, and offered him a few directions to choose from - herbs, potions, scriptures, magical beasts, alchemy, and charms. Eventually, Calvin chose the already successful Fantastic Beast as his research direction, and in order to understand the flow of magical power, he invented the Magic Tracker.

However, it soon became clear to Calvin why searching for the origin of magic was taboo by Dumbledore - and after much further exploration, Calvin discovered that the birth of magic was closely related to the soul.

Calvin had to stop his research, otherwise he would really degenerate into a dark wizard, and any alteration of the soul would fall under the category of dark magic, such as the three unforgivable spells: the Imperius Curse, the Heart Drill Curse, and the Death Reel Curse. Dealing with the control, torture and destruction of the soul, respectively.

At first, Calvin just thought he had chosen the wrong direction, so he changed his research direction, but soon failed, whether it was herbs, potions, alchemy, or magic spells, in the process of tracing their origins, he inevitably touched the study of the soul.

Calvin tried to bypass the soul from various angles, and even delved into magic paintings, but without exception failed. The soul is like an impassable wall, waiting for everyone on the path to the origin of magic. That's when Calvin understood why Dumbledore had to warn himself not to try to trace the origins of magic.

But this also means that Dumbledore has conducted the same research, and has also touched the forbidden soul research, and even Dumbledore has studied the mysteries of the soul.

Calvin took a notebook from his bag and handed it to Dumbledore, "This is my conjecture about this research, a record of my correspondence with Teacher Nicol. ”

Dumbledore took the notebook and read it seriously. Soon, he closed his notes and handed them back to Calvin, "I need to discuss this with Nicol again, is there anything else you have to say?" ”

"Actually," Calvin hesitated, "I wouldn't have wanted to come back if it hadn't been for Nicolame saying that returning to Hogwarts would help my research." Britain is not safe, and neither is Hogwarts. ”

Calvin raised his head and looked directly at Dumbledore's blue eyes: "Voldemort is not dead, is he?" ”

This surprised Dumbledore, and he asked softly, "Why do you say that, Calvin?" ”

"You didn't even contradict me, and it seems that you know about it." Calvin chuckled, "That year I met Lord Voldemort in the forests of Eastern Europe and Albania, and he possessed small animals in a vain attempt to trick me into serving him. But I rejected him and chased and killed him three times, but he seemed to be resurrected every time, and I had no choice but to give up. ”

Dumbledore tapped his fingers on the table and whispered, "Albania?" Thank you, Calvin, for the helpful message you brought. ”

"And my job?"

This time it was Dumbledore's turn to fall silent, intellectually, believing what his old friends had to say about Calvin, and his promise that Calvin would not degenerate into a dark wizard.

But he was still hesitant, he didn't know how much the bullying had affected Calvin back then. Did Calvin really come back for the study of magic? Or is it for revenge? Whether he will be the next Dark Lord or not, only this time the wand is directed at the rotten pure-blood families.

The same Slytherin, the same good and brilliant, the same obsession with magic, but in two directions.

"Where are you in your research?" Dumbledore asked softly.

"The flow of magic in the body of a magical beast." Calvin looked a little excited and began to talk eloquently, "I found that the flow of magic in the body of magical beasts is a circuit, and different magical beasts have different circuits. Some Fantastic Beasts have multiple different circuits in their bodies, and these circuits are the source of Fantastic Beasts' magic. ”

"Moreover, the patterns of these circuits are closely related to ancient magic scripts, and even ancient magic. Based on this, I have restored several lost ancient magics. ”

"I've even found similar patterns in some Muggle archaeological finds. I confirmed my conjecture from multiple angles. ”

Dumbledore listened with great interest to Calvin's account of his discoveries over the years, and from time to time he would offer his own ideas. The young wizard studied the origins of magic in many ways, and all achieved great success without touching the soul.

Dumbledore finally understood how his old friends had come up with their excellent opinion of Calvin.

The principal's office fell silent again.

After a long moment, Dumbledore stared at Calvin again. Calvin didn't dodge this time, and looked directly into Dumbledore's sharp gaze, and his intuition told him that whether he could return to Hogwarts or not was up to him this time.

Dumbledore lowered his eyelids, he was sure that there was no flame of revenge in Calvin's eyes, but rather a familiar taste in his eyes.

Dumbledore had already decided, "Well, you can see that you are very strong inside. ”

"Lots of love, huh?" Calvin laughed, "Even in the midst of darkness and evil, people who are bright and upright will come out." ”

"You're right, you're a man of integrity." Dumbledore smiled as well, "Professor Sylvanus Kettleburn has asked me to leave for the third time, and if there is no one to replace me, I will have to let Hagrid teach the young wizard." ”

"Hagrid loves Fantastic Beasts, but that's not good news for the students."

Dumbledore nodded, "That's what I think about too. So I think I can safely hand over these little wizards to you. But..."

Calvin tensed up again.

"But you're only taking Kettleburn's teaching position temporarily, and I'd like to talk to Nicola May about that research a little later."

Calvin was still not satisfied, and nodded vigorously in agreement.

Coming out of the principal's office, Calvin rearranged his clothes, the process was tortuous, but the future was bright, and he finally returned to this place after eleven years of absence.

The center of the wizarding vortex for the next few years - Hogwarts. As a professor.