"Lacewings, leeches, sluggers, and two-eared grass...... Ron, you can help me check if I missed any materials."

In the girls' bathroom on the second floor of the castle, Hermione said to Ron impatiently, because she noticed that the latter was absentmindedly looking around in the bathroom while she was busy with her work, looking like she was in a daze?

"No, you've already checked it three times!" Ron muttered as he walked over, grumbling as he counted the potion materials on the toilet bowl.

"You know, the configuration process of the compound decoction is quite complicated, and there is no room for the slightest mistake in any link, as long as we don't put it right in one place, then this pot of potion will be considered a waste!" Hermione looked rather agitated due to the frequent tapping of materials.

"And we certainly didn't have time to reconfigure the pot again, it was already the end of the semester and everything was too late, so I had to check the materials I had prepared accurately." Hermione handed Ron a piece of parchment, densely filled with materials to prepare.

"Check a little bit on this list, then weigh each material on the scale, and I'll go and raise the fire first."

"Oh." Looking at Hermione, who was very powerful, Ron sighed helplessly, and then obediently took the parchment and compared them one by one.

Ignoring Ron's complaints, Hermione set the materials aside and opened the lid of the toilet bowl to create a waterproof flame that she could carry around, a trick she had been using since she was in first grade.

"It doesn't feel good to say a spell on the toilet, I wouldn't do it if I had a choice!" Muttering softly, Hermione raised her wand, and after a short, powerful spell, a ball of azure flame burst out of her wand and fell into the toilet bowl in front of her.

In the wizarding world, there is obviously no such thing as water extinguishing the flames, and the blue flame floats in the toilet water, burning silently, and at the same time, the air around it becomes warmer.

"It's a shame that you can figure out how to use a flush toilet as the base of a crucible!" Seeing this scene, Ron couldn't help but complain.

"What can I do, it's not in Potions class, I have to use all the resources we can use." Hermione replied a little helplessly.

"I checked again, there's no problem, should we go see Harry first? He didn't know we were here. Looking at Hermione, who was adding water to the cauldron, Ron couldn't help but remind.

"But we're running out of time, and the sooner we can make the polyjuice potion, the sooner we'll be able to find out what Malfoy's mouth is." Hermione didn't even look back, she was now immersed in the potion's configuration.

To be honest, Hermione's potions talent is still okay, and not just a young wizard can successfully concoct a potion as complex as a compound potion in the second year.

Perhaps becoming a master apothecary would be more suitable for Hermione than becoming a lawyer at the end.

"That said, Harry may not come until noon, Madam Pomfrey won't let Harry go easily, and then we can go to the break room and tell Harry."

I don't know how long it was, but while Hermione was concentrating on making lacewings, Ron suddenly heard the bathroom door open and someone came in from outside.

"Who's out there, no one wants to come to this place except us!" Frightened and frightened, Ron whispered to Hermione.

"Quiet~" Hermione immediately waved her wand to turn down the temperature of the flames, and then looked out through the keyhole of the cubicle with some nervousness.

If someone finds out here, Hermione is a little afraid to continue thinking about it, and if she secretly configures a potion that is forbidden by the Ministry of Magic, they will definitely be expelled!

Thankfully, just as the little witch was thinking, Harry's voice came from outside the bathroom cubicle, "Ron? Hermione? Are you here? ”

"It's Harry!"

Hermione pushed open the wooden door to the cubicle, and sure enough, Harry was standing there a little bewildered, his right hand that had been hit by a Bludger was not bandaged, and it seemed to be doing well.

"How's your arm?" Hermione asked, with some concern.

"The recovery is good, and that damn potion still has some effect."

"How did you find here?" Inside the cubicle, Ron poked his head out as well, and he asked a little strangely.

"I left the hospital in the morning and went back to the Gryffindor common room, but none of you were there, and there was no one in the dorm, so I thought you might have come here, so I came here to look for it."

"You scared us a lot, we were going to see you, but then we thought about it and thought that we should make the compound decoction first, after all, every second counts, isn't it?" Ron said to Harry.

After Harry had entered the cubicle, Hermione reclosed the wooden door of the cubicle, and the three of them were huddled in the small cubicle, with a steaming crucible on the toilet next to it.

"Who came up with the idea for a polyjuice decoction here?" Harry asked.

"After thinking about it, the two of us decided that it was safest here, and no one would come to this abandoned bathroom except Myrtle." Hermione explained to Harry.

"Did you see the myrtle?"

"No, she wasn't here when we came, and I don't know where she went." Ron pursed his lips, he didn't like the crying ghost very much.

"It's okay, Myrtle certainly won't mind a little more anger in her house." Hermione replied as well, throwing a few locusts into the pot, and then staring intently at the color of the liquid inside the cauldron, and nodded in satisfaction as she saw the liquid gradually turn dark green.

"There's nothing wrong with the potion configuration, we now need to boil these lacewings first, and the compound decoction needs to be boiled for twenty-one days, which is why I said that this potion needs to be used for nearly a month." ”

"Did you know there was an attack last night? Colin," Hermione interrupted Harry before he could finish his sentence.

"We already know that Professor McGonagall came to the Gryffindor common room last night to tell us about the situation, and in fact, almost all of the young wizards were talking about the attacks this morning, and the Muggle-born students were terrified." Hermione explained to Harry.

"That's why we're going to have to hurry up and get Malfoy and William to the rescue before they kill more." Ron was still secretly speaking ill of William.

But what he didn't expect was that just after he finished saying this, William's voice suddenly sounded outside the bathroom outside the compartment where Harry and the others were.

"Weasley, it's not a good habit to speak ill of people behind your back."