Hearing Leo's words, Dumbledore nodded and casually reminded, "If you feel some details aren't quite what you need, you can use Transfiguration to modify them. The changes will be preserved next time you enter."
Leo then drew his wand and began transforming facilities convenient for Potions and Alchemy.
Watching Leo's smooth and confident Transfiguration, Dumbledore smiled gently, seemingly thinking of that trapdoor in the three-headed dog's room—also a very clever piece of Transfiguration work.
"Three-headed dog bites must be quite difficult to treat, especially with the Dark Magic attached."
Hearing Dumbledore's question, Leo didn't stop his work. And the headmaster still claimed to be an old man with poor memory?
Actually, Leo wasn't surprised Dumbledore would suddenly ask this question. With so many ghosts and portraits in the castle, when Harry and the others encountered the three-headed dog and ran all the way out of the castle, they would definitely be noticed.
And these ghosts and portraits served the Headmaster, so Dumbledore probably knew that very night about Harry being bitten by the three-headed dog. As for afterward, when Harry ran to Hagrid's hut—even without those informants, Dumbledore could guess.
As long as Dumbledore asked Hagrid and cross-checked accounts, who had helped treat Harry would be clear enough.
Leo stopped his Transfiguration and put away his wand.
"It's alright. Combining some special potions can also dispel the Dark Magic on the three-headed dog's teeth. Simply treating the wound is actually quite simple."
Since Dumbledore already knew he'd healed Harry, there was no need to deliberately hide it. Of course, Aurelius's existence didn't need to be revealed for now. Dumbledore probably wouldn't press further anyway.
As Leo expected, Dumbledore only nodded with a smile. "I heard Severus mention that your performance in Potions is also excellent. Oh right, although three-headed dogs are somewhat 'afraid of fire,' they're still very dangerous magical creatures. Best not to approach them lightly."
Indeed, being afraid of fire was true, but as for dangerous... Leo thought of Fluffy's docile appearance with his belly exposed. Very dangerous indeed.
"I understand, Headmaster."
Moving on from the topic, the two chatted a while longer before leaving the Room of Requirement.
Inside Hagrid's hut, Harry was brewing potions while Leo was working with a metal flask, occasionally using his wand to cast magic and adjust the space inside.
This was a newly made portable Undetectable Extension container, prepared for housing some magical creatures. Mooncalves seemed like a good start—after all, their dung was excellent fertilizer that could promote Carnivorous Cabbage growth.
Those little cabbages were growing well and should mature within a month just fine. Then he could repay the Diligent Little Gardener loan.
He'd need to make another container specifically for cultivating magical plants. Newt had already explained in his reply letter how to provide the elements plants needed for growth.
Besides Mooncalves, should he also house some Acromantulas? There were too many of those spiders anyway, disrupting the Forbidden Forest's ecology. Keeping some on hand would make extracting venom convenient, though the effect definitely wouldn't be as good as what Aragog produced.
Speaking of Acromantula venom, now that he also had Erumpent explosive fluid, he could start brewing Belated Truth, though he couldn't make it here—he'd blow up Hagrid's house.
After creating this alchemical potion, he could try crafting special magical bullets. The revolver transformed from the pocket watch was currently just an empty frame, while ordinary gunpowder bullets had limited use.
Leo thought he'd just make another Undetectable Extension container specifically for alchemy experiments. After adjusting the metal flask in his hands, he smiled to himself—this thing was really convenient. No wonder Newt had liked carrying a suitcase and traveling all over the world.
"Leo, the Scar Removal Paste is ready. Do you want to check it?"
Leonardo put away the small gourd and inspected Harry's potion homework.
"Generally no problem. The brewing time could be one minute shorter for better results, add a bit more essence of dittany..."
While listening to Leo's explanation, Harry took notes carefully.
After everything was said, Harry remembered something. "By the way, Leo, about compensating you for the potion you used to treat me last time—Hagrid already helped me get new magic books. Wait a moment."
Harry retrieved a book from the storage chest Hagrid had told him about and handed it to Leonardo.
This book was thinner, about one-quarter to one-fifth the thickness of the last one. Leo looked at the cover—still the gilded capital letter "P."
Opening it, he briefly skimmed through. Alchemy that used magical creature body parts as the main component, magnifying and utilizing their characteristics? This was quite interesting.
Leonardo's first thought was using this alchemical method to create special bullets. But which magical creature materials to use? Maybe he should ask Hagrid—he had many items produced by magical creatures and should be able to find something that could work wonders.
Just as Leo was about to continue reading, a knock interrupted his thoughts.
Who could it be? Ron had gone to walk the dog; Hermione said she was going to the library to read.
Leonardo walked over to open the door. Standing there was a bespectacled male student. His clothes were very neat and tidy, appearing meticulous. Judging by his height, he should be an upperclassman.
Leo noticed his fiery red hair and immediately had a guess. "Are you looking for Ron?"
The male student paused, then nodded. "Yes, hello, I'm Percy, Percy Weasley. Ron is my brother. He seems to be here. I'm looking for him about something."
Percy had received two letters from home—one for Ron. The other letter was from Mum telling him Ron had requested the family's magic books because he wanted to learn to make alchemical mechanics from a classmate, wanting to use magic book borrowing as payment.
Their mother Molly's first reaction was disbelief. Never mind whether a first-year student knew alchemy—the key was she knew her youngest son Ron too well. When had he ever been so proactive about magic?
So she had her most steady son, Percy, come help Ron assess the situation, making sure he wasn't being deceived by some bad kid.
Percy looked at this junior with dark golden hair and deep emerald green eyes. "You must be Leonardo Grafton?"
"That's right."
"It's like this—my brother Ron is rather simple; some things..."
"Percy? Why are you here?"
Hearing the familiar call, Percy turned to look. He saw Ron with a rope in each hand.
The left rope held a large, fierce-looking black dog. The right rope held something with a white exterior, gears exposed in the gaps, eyes of crystal emitting blue light...
"Wait, Ron, what exactly are you walking?"