Flitwick's expression grew even more serious. "This is difficult. Completely different spells will disrupt the original magical structure, but similar spells can be added, where the interference between them is less."
Herman pressed further, "For example?"
Flitwick put down his quill. " The Levitation Charm itself has more room for expansion than you think. If you want to add other spells to it, you can't choose ones that are too different, as that will disrupt the original magical pathways. But you can choose spells that are similar in essence to the Levitation Charm, such as the Flying Charm."
Herman repeated the word: " Flying Charm?"
Flitwick nodded. " The Flying Charm is essentially a more advanced form of the Levitation Charm, transferring magic from controlling an object to controlling oneself. The caster envelops themselves in magic and maintains this state, thus achieving autonomous movement."
Herman thought for a moment, "What's the difference between this and the Levitation Charm?"
Flitwick patiently explained, " The Levitation Charm allows your magic to attach to an object and lift it up, while the Flying Charm allows your magic to envelop you and maintain that state."
The former is a momentary command, while the latter is a continuous burden. Moreover, controlling an object without magic is much simpler than controlling a body with magic.
You yourself are a vessel of magic, and casting spells creates natural resistance, which is one of the reasons why the Flying Charm is so energy-intensive and difficult to learn.
Herman listened quietly and said, "I haven't seen the Flying Charm in the textbooks, and I've looked through the table of contents in the older textbooks, but it doesn't seem to be there."
Flitwick nodded. "Because they're used less now. Flying brooms are more convenient and less strenuous; for long-distance teleportation, there's Apparition, and for medium to short distances, there's the broom. Flying Charm consume too much magic and require high precision to control, so they've gradually been replaced, and that's why they're no longer included in textbooks."
Herman was silent for a moment, the image of Voldemort flying through the air as black smoke flashing through his mind. "Can I learn the Flying Charm?"
Flitwick glanced at him, his tone unchanged but his pace slowing slightly. "With your current magical reserves, it's unrealistic to expect to perfectly master the Flying Charm. However, you can start by learning the Summoning Charm, which is formally taught in the fourth year. It's of moderate difficulty, and the skill ceiling and floor vary greatly. Just don't use it to summon Giant."
He smiled. "You can find relevant information in the library to understand the principles first. If you have any questions, feel free to ask me."
Herman stood by the podium, listening to Flitwick finish speaking, and then asked, "So, expansions can only use similar spells? Can't we add completely different spells?"
Flitwick lowered his wand and reiterated, "Completely different spells disrupt the original magical structure. It's like two rivers flowing in opposite directions forcibly merging; the currents collide, causing the original riverbed to collapse."
Herman paused for a moment, then spoke, "But I can use Transfiguration."
He said this in a very flat tone, as if stating something he had already tried.
Flitwick's eyebrows twitched, as if he had heard an unexpected answer, "You've tried?"
Herman nodded, took the playing card from his pocket and placed it on the table, without taking out his wand, he simply raised his hand.
The playing card floated up from the table, flipped once in mid-air, its edges hardened and thinned, and its surface gleamed with a metallic sheen.
He controlled the Transfiguration card to draw a complete circle in the air before it fell back onto the table, returning to its original shape.
Flitwick stared at the card for a long while, then looked up, his tone noticeably more serious than before. "You changed the card's shape while maintaining its flight path."
He paused for a moment, "This isn't a simple layering of spells; it's two magical forces operating in parallel. Acquired practitioners need a lot of practice to achieve this, but you seem to have been born with it."
Herman stood there silently, waiting for him to continue. Flitwick stepped down from the pile of books and onto the ground, but because of the small height difference, he had to tilt his head slightly to see Herman's face. "This is a rare condition; you could call it Dual Casting, but for you, it seems more appropriate to call it a natural Twin Casting Ability."
Herman repeated, " Dual Casting?"
Flitwick stood back on the stack of books. "It's a skill that requires a deep understanding of magic combined with exceptional manipulation."
Being able to cast multiple spells simultaneously to deal with different scenarios, the simplest example is simultaneously attacking and defending. Let me show you a simple example.
As he spoke, he raised his wand, the tip of which glowed, while his other hand pointed to a book on the table, which opened several pages on its own. The two actions occurred simultaneously, without interfering with each other.
Herman watched the book turn its pages by itself, then looked at the light at the tip of Flitwick's staff, and went over both in his mind.
Flitwick withdrew his hand. "Your situation is different from mine, which I developed through training. You are a natural Dual Casting, which is far rarer than acquired skill."
He put down his wand. "I'm afraid I can't give you much guidance, and the other professors probably can't either. This is an innate ability, different from what we learn later in life."
Perhaps only a wizard Headmaster Dumbledore, who has begun to touch upon the essence of magic, can help you understand the intricacies of it all.
Furthermore, Headmaster Dumbledore was also a professor of Transfiguration, so you can ask him for information about Transfiguration.
Herman paused for a moment when he heard Dumbledore.
As someone with secrets, being alone with an old man who could freely Legilimency people's thoughts and privacy was indeed very stressful for him.
He instinctively hesitated, saying, "The headmaster is too busy; I'd better consult Professor McGonagall first."
Flitwick shook his head, his tone gentle. "The principal is indeed very busy and often away from home, but there's actually not much going on when he's at school. All the affairs are handled by the vice-principal."
He glanced at Herman, as if reading something from his face. "Are you a little nervous? It's alright, the headmaster is very easy to talk to. He really likes talented young wizards."
Herman silently added in his mind: Yes, he likes it, but the talent can't be too high. The last one with too much talent was Riddle, nicknamed Voldemort.
Of course, he didn't say those words aloud; he just nodded vaguely.
Flitwick seemed oblivious to his hesitation. "Going directly to the principal is indeed a bit presumptuous. How about this, next time I see the principal, I'll let him know first. You can practice more and familiarize yourself with these abilities."
Herman thanked him, tidied up his things, and turned to leave the classroom.
As he walked out the door, he mentally reviewed Flitwick's words, which were basically the same as Marlene's, but more specific, providing a direction for expansion and explaining Twin Casting in more detail.