Professor of Pharmacy at Hogwarts

"There are two bottles of antidote here, one can go forward and one can go back." Hermione explained based on what was written on the parchment.

"Two bottles contain nettle wine, and three bottles contain poison."

"We just need to find two bottles of the antidote."

"Which bottles?" Harry asked.

"Second, the contents of the bottles at the left and right ends are different. If you want to move forward, neither of them will be of use to you;"

"That is to say, the first and seventh bottles are either potions that have been withdrawn, or they are poison or nettle wine."

"Thirdly, you will find that the bottles are of different sizes. Death is not hidden among giants and dwarfs;"

"This shows that the third and sixth bottles are not poison."

"Fourth, the second on the left and the second on the right, although they look different, they taste the same."

"This means that the second and sixth bottles are either filled with poison or nettle wine at the same time, because the antidote used for forward and backward cannot be of the same flavor."

"The third bottle and the sixth bottle are not poison, so the second bottle is not poison either."

Hermione's fingers brushed over the second bottle, the third bottle, and the sixth bottle in turn, moving them out a little.

"There are three bottles of poison in the remaining first bottle, fourth bottle, fifth bottle, and seventh bottle."

Hermione pointed to the four bottles that stayed in place and read again.

"First, no matter how cunningly poisons hide, they are actually on the left side of nettle wine;"

"In other words, the poisons are all on the left side of the nettle wine, and the seventh bottle cannot be poison."

She moved the first, fourth, and fifth bottles aside.

"These three are poison."

Harry didn't dare to speak, although he wanted to remind Hermione not to do this, which would mess up the order of the bottles, and if they couldn't figure it out, they wouldn't even be able to return them to their original positions.

"And the second and sixth flavors are the same. So, they're both nettle wine."

Hermione removed the second and sixth large bottles and set them aside.

According to Hermione's explanation, all that's left now are the third and seventh bottles. One of them is a potion for moving forward, and the other is a potion for retreating.

"It says this." Hermione pointed at the parchment and said, "The first and seventh bottles are useless for progress."

"So, this bottle is a potion for retreat."

Hermione picked up the seventh bottle, then pointed to the third, smallest bottle.

"This is a potion for moving forward."

A flash of amazement flashed in Harry's eyes. If it weren't for the occasion, he would have applauded Hermione.

"But there's not enough room for two people."

Hermione frowned and stared at the vial.

"This can allow people to go back through the purple flames, right?"

Harry asked, picking up the seventh bottle.

Hermione nodded.

"You drink this bottle."

Harry handed Hermione the potion for recovery, took the small bottle, and when Hermione was about to speak, he said

"Hermione, don't interrupt yet. Listen to me—"

"You go back and take Ron to the Owlery, write a letter to Mr. Alexis, and tell him everything."

"He'll be here to help."

"But--"

Before Hermione could finish speaking, Harry raised his head and drank the small bottle in one gulp.He shook the small bottle with the mouth downwards, but he didn't see a drop of liquid dripping for a long time.

"It's not enough for one bite."

Harry smiled at Hermione, then waved at Hermione and walked forward.

She mustered up her courage and walked into the black flames.

The moment the flames wrapped around his body, he felt cold all over his body, without any burning sensation. Hermione's shout behind him seemed to disappear, and everything around him became quiet.

At that moment, he could see nothing, only black flames in front of him. Then, he successfully came to the other side and entered the last room.

……

The Shrieking Shack on the hillside outside Hogsmeade.

Alexis lay bored on the grassy slope and counted the stars.It was already the end of September, and the grass and trees had turned yellow, and the entire hillside was in a state of decay, which made the romantic thing of counting stars boring.

Oh, it's Alexis counting stars.

He doesn't deserve romance, or he doesn't understand what romance means -

Taking out his pocket watch to check the time, Alexis stuffed the watch back into his pocket, stood up, brushed off the blades of grass on his body, and walked into the Shrieking Shack muttering.

He didn't see that not long after he walked into the Shrieking Shack, a skinny black dog ran down the mountain...

Alexis returned to the Hogwarts campus along the secret passage, quietly dodged Filch and his Mrs. Norris, and reached the fourth floor.

Lu Wei was sleeping soundly, and his three pairs of ears seemed to be aware of Alexis' approach and started to move slightly.

Alexis took out the flute she got from Hagrid and started playing it awkwardly.

Lu Wei, who was about to wake up, immediately fell into a deep sleep again.

After crossing Lu Wei, jumping down the passage, and bypassing the devil's net, Alexis stood in the key room, staring at the two brooms in the center of the room.

Someone came!

Alexis pulled out her wand, looked around alertly, then waved the wand and disappeared.

……

In the last room.

Quirrell was standing in front of the Mirror of Erised with his back turned. In front of him, Harry nervously grasped the wand, his joints turning slightly white.

You could tell he was nervous.

Quirrell waved his wand easily, and several ropes appeared out of thin air, tying up the nervous Harry.

This cross-level battle is over before it even begins.

"It's really you!"

Harry struggled and shouted to Quirrell.

"Weren't you always suspicious of Snape and Alexis?"

Quirrell walked up to Harry lightly and leaned over to look at Harry. By this time, his stuttering had completely healed.

Harry didn't speak, just struggled, trying to break free from the rope.

"Snape doesn't look like a nice guy, does he? He's flying around like a giant bat, and he's very helpful to us. With him there, who can doubt that - but - —Poor, stammering Professor Quirrell?"

Quirrell waved his arms dramatically, like a performer on stage.

"And Alexis, ah! He is just a brat who has not grown up. He will only hide under the protection of Grindelwald and Dumbledore and yell at others-"

"Oh, he also cries loudly!"

Quirrell was in no rush to take action, he seemed to enjoy this moment of victory.

He wanted to say something sarcastic and declare his victory, but a weak voice came from him.

"Go quickly...go get the magic stone..."

Quirrell's movements like a musician stopped abruptly, deep fear flashed in his eyes, and he quickly turned back to the Mirror of Erised.

Harry struggled while looking around the room. There was only a strange mirror in the center of the room, and the rest of the room was empty.

Did they guess wrong?

Or is the Philosopher's Stone hidden in the mirror?

Seeing Quirrell approaching the Mirror of Erised, Harry struggled even more.

Suddenly, his struggling movements froze.