Let's go out and play, but don't let the professor know

Aksha gave Regulus a rather satisfied look, quite pleased with his earlier agreement.

"Little Albus specifically mentioned you to me," she said, dropping the topic of Voldemort and turning her gaze to him with a hint of novelty. "Before I came, I even asked him, 'Are you really here to study?'"

Regulus shrugged, his tone casual. "Of course I'm here to go to school."

Aksha looked at McGonagall with a puzzled expression, then back at him. "Then why do you still need the professor to remind you to do your homework?"

McGonagall nodded in agreement, her gaze falling upon him.

Regulus opened his mouth, wanting to retort, but after catching a glimpse of McGonagall's gaze, he decided to remain silent.

That old man is such a chatterbox; he even brings up homework. I haven't told anyone about your messy affair with Grindelwald.

Aksha, satisfied with his expression, continued, "I heard you turned the Shield Charm into a shell, sat inside it, and had Fiendfyre propel you flying?"

Regulus smirked. "He even told you that?"

Public battles can be seen in the newspapers; they're all over the place, so it's easy to find out. But the structure of the Flying Device has never been reported in the newspapers. Aksha even knows that the shell is made of the Shield Charm. The old man explained it in quite detail.

Aksha looked out into the open space, with a vast grassland behind her, and further away, the Black Lake reflected the moonlight, making the night sky above seem even more expansive.

Her brown eyes were full of anticipation, eager to try. "Fly around?"

"No," McGonagall refused immediately, her tone serious. "Aksha, it's the middle of the night."

Aksha replied matter-of-factly, "That's why you can see it clearly."

McGonagall stared at her.

Aksha didn't argue with her, waving her hand. "Alright, alright, during the day?"

"The Castle won't do," McGonagall glanced at Regulus, "And the Forbidden Forest won't do either."

She had witnessed Regulus's first test flight in the Forbidden Forest and heard the commotion that had alerted the entire Castle.

Aksha was still egging them on. McGonagall felt a headache coming on, and looking at Regulus made her feel even more exhausted.

Neither of them is quiet. Regulus only puts on a respectable act at school; what he does outside of school is probably his true nature.

One is good at causing trouble, and the other loves to stir up trouble; they just happened to end up together.

Aksha refused to give up and turned to Regulus: "Where do you usually fly?"

Regulus grinned. "Cornwall."

Aksha immediately made a decision. "Then let's go to Cornwall."

McGonagall called her helplessly, "Aksha."

"He didn't say he'd go now," Aksha said innocently, glancing up at the Castle. "He can always go when he's on vacation, right?"

The night breeze ruffled Aksha's shawl, which she casually pulled back to cover herself, her attention still on flying. "How could you have thought of putting Fiendfyre behind you? Did you think the Broomstick was too slow?"

Regulus shrugged slightly. "It is slow, indeed."

Aksha looked at him, then raised her hand, and a small Shield Charm appeared out of thin air, its color dark, its shape changing back and forth in her palm.

The shield was flattened, the edges were folded inward to form a square box, and then stretched from the middle, with several corners rounded off without any hesitation.

Then unfold it back into a thin barrier, always with a uniform thickness, and play it very skillfully.

"How did you come up with the idea of using the Shield Charm as a shell? How did you do it?"

Regulus also opened his hands, and the silver barrier closed in front of his palms, stretching into a slender shell with a tapering front, short wings spreading out on both sides, and a nozzle at the tail.

As he spoke, he fiddled with the object in his hand. "Shaping it isn't difficult. The Shield Charm is originally meant to block outwards, so we have to turn it over first, making it into a shell with the opening facing backwards."

The shell should be pointed, with short wings, and a funnel-shaped opening at the back from which Fiendfyre will spew out.

Aksha had already closed the barrier in her hand, and the nose of the aircraft followed suit, tapering to a point. Regulus had just finalized the shape of the tail when she created the same nozzle.

Regulus glanced at it and added a small opening to each wingtip, "Leave two here too, for adjusting direction."

"Use them to turn?" Aksha turned the model to the side, the openings at the wingtips turning slightly with her gaze.

"Okay, the one in the back is responsible for flying forward, while the others adjust the balance and direction," Regulus said, tilting his model to the side and changing the direction of the nozzles. "Several things need to be managed together; if it's off-center, it will spin."

Aksha followed along, almost perfectly replicating Regulus's steps, matching the proportions and shapes perfectly, even matching the curvature of the final flared mouth.

Regulus opened the outer shell, revealing the inside. "We still need to add Shock Absorption Charm and Anti-G Charm, otherwise, once the speed increases, the people inside won't be able to withstand it and will crash back in the original direction. The flight speed varies, so we need to be able to control it."

Aksha looked up, somewhat curiously. "You were in an accident?"

Regulus glanced at McGonagall beside him and answered cautiously, "So it was added later."

McGonagall's gaze did indeed turn towards them.

He lifted the model slightly, revealing a layer of Silver Light inside, and continued with the main point, "The outer shell structure needs to be well-buried; it will vibrate at high speeds. We need to continuously output Magic Power to maintain it, otherwise it will be shattered by the air when it exceeds the speed of sound."

Aksha's eyes lit up.

Exceeding the speed of sound?

That's not much slower than hers; I must learn it.

A moment later, the two models stood side by side, identical in shape and proportion, except for their different colors.

McGonagall watched as the two began to talk, then closed her eyes briefly, deciding to ignore them and return her gaze to the water.

Fiendfyre blocked it, but Shield Charm couldn't stop it too.

Aksha slowly spun the model in her hand, trying to shorten one wing, then putting it back on the other side, a look of satisfaction flashing in her eyes.

"Little Minerva," she stared at the small shell in her hand for a while, then gently flicked it with her fingertip to make it spin faster, "Even the Shield Charm can cause him this much trouble. What have you taught him?"

Regulus clasped his hands together, and the Silver Light dissipated.

The variations of the Shield Charm were his own invention, but that didn't stop him from flattering the professor.

He then looked at McGonagall and said earnestly, "The professor teaches well."

McGonagall was unmoved, but her tone softened. "Don't blame me for Fiendfyre's actions."

Regulus's tone remained unchanged. "Transfiguration, Fiendfyre, I learned those myself."

Aksha withdrew her Magic Power, then remembered the photos in the newspaper, her interest undiminished. "I've seen the photos of the mushroom cloud you blew up at the Rowle family, want to give it a try?"

McGonagall was getting annoyed. Just as Fiendfyre stopped her, she got even bigger ideas. "Aksha, what are you planning to have him blow up at school?"

Aksha looked back innocently. "Can't I even ask?"

McGonagall looked at her with her lips pursed, without saying a word.

Regulus, listening nearby, couldn't help but chuckle.

The mushroom cloud comes from multiple explosions that have accumulated over time. If she really wants to see it, that's not impossible; it's not a big deal to set it off.

Given his current Magic Power, if he were to explode again, the power would likely be even greater than the last time.

But you need to find a sufficiently open space, and preferably with a target; it would be a real shame not to blow something up with an explosion of that magnitude.

Aksha turned to him again. "Come see me during the day next time."

Regulus glanced at McGonagall before telling her seriously, "Professor McGonagall won't let me play with you."

McGonagall paused for a moment, then looked at him reproachfully. "When did I say that?"

Regulus's face showed a look of realization, Aksha immediately took it happily. "Did you hear that? She said it's okay."

McGonagall looked at the two of them, feeling both annoyed and helpless.

Aksha laughed triumphantly.

This little wizard is interesting to tease. As soon as Little Minerva looks at him, he changes his expression. Next time, she'll have to let him do it himself.

A sudden explosion rang out on the water's surface. James and Sirius were concentrating their attacks on the same mirror, causing the mirror to dent deeper and deeper. The reflection that crawled out of the mirror had its chest and abdomen deflated, only to be pulled back into the frame.

Peter was still huddled by the door, his hands covering his head, completely useless from beginning to end.

Sirius used the Transfiguration stone wall to block another reflection. James seized the opportunity, gritted his teeth, and continued to strike, the tip of his staff flashing as he hurled spell after spell into the wall.

Suddenly, a crack appeared in the center of the mirror, and the crawling reflection was torn apart from the chest, with the grin on the face also splitting to the ears.

Sirius immediately added the spell, glared, and swung his wand hard at the crack, shattering the mirror with a bang.

The three reflections simultaneously leaned back, splitting open from head to toe. Their scattered bodies dragged across the stone slabs, were caught in the mirror frame, and fell to the ground along with the gleaming silver fragments.

James held up his wand, his chest heaving, staring at the picture frame for a while before letting out a long breath.

"Smile again!" he yelled, grinning at the glasses, barely catching his breath, his arrogance barely contained. "Come out here!"

Sirius grinned broadly, raised his hand and gave James a high five. The two stood there panting, both exhausted but thoroughly enjoying themselves.

The moon had already passed the treetops, and the shadows on the ground had lengthened. The roars from the shed gradually subsided, and after a long while, one sound rang out again, and then even the sound stopped. The wind rustled the nearby grass.

Regulus tapped his finger lightly, and the bronze door in the water made a low sound as its hinges slowly turned, revealing a crack.

Peter suddenly looked up, stared at the doorway, and then scrambled to his feet. His feet slipped, and he fell to his knees again. Without even bothering to steady himself, he grabbed the door frame and tried to squeeze out.

After a while, a head peeked out from under the door. "Sirius! James! The door's open!"

James turned around, raised his wand, responded, and ran out. Sirius followed, glancing back at the empty picture frame before leaving, his excitement undiminished.

"Let's invite Remus next time," James said, glancing back inside as he left the room. "He'll definitely like it."

Sirius ruffled his hair and grinned, "Let him take the picture first."

"Yes, don't tell anyone," James thought, increasingly amused. He turned and saw Peter, his face instantly darkening. "What were you doing just now?"

Peter shrank back and didn't say a word.

"We've been fighting in there for ages, and you can't even cast a spell?" James's temper grew angrier as he spoke.

Peter lowered his head and stared at his feet. Sirius glanced at him and tugged at James's arm.

James pursed his lips, looked away, and followed him forward. Peter quickly caught up.

Regulus waved his hand, and the water in front of him parted, tiny droplets falling into the grass.

McGonagall's gaze fell on him, her tone returning to its stern tone. "Mr. Black, you should go back to sleep."

We can talk to Pomona and the others about what happened tonight. Horace and Filius should also be invited. Let's see if this method can be used in a few colleges. Putting what we've learned in class into the scenario and letting the students come up with their own solutions is better than just memorizing.

Regulus readily agreed, nodding and becoming respectful again. "Good night, Professor."

McGonagall's voice softened slightly. "Good night, Mr. Black."

Aksha, however, was in high spirits. Moonlight fell on her brows and eyes, and her brown eyes looked at him cheerfully. "You're quite amusing, little Regulus."

Regulus raised an eyebrow and replied truthfully, "You too," but something felt off, so he gave a polite bow and left the rest of his answer unsaid.

Aksha blinked. "It's a promise, come find me during the day next time."

She glanced at McGonagall and kindly reminded him, "Don't let your professor know."

McGonagall stood to the side, expressionless.

Regulus looked at her and smiled. "Of course."