[HP] The Tweed River flows

"I knew you would be great."

In the afternoon, when we walked towards the basement classroom together, Sylvia said triumphantly.

"It's just luck," I blushed, "I bet you won't be so lucky next time."

"Anyway, everything else is defeated by you, but Potions is not guaranteed!"

The underground classroom is at the bottom of the castle.Compared with other sunny classrooms in the castle, this place always gives me a cold feeling.

"You said, there are so many empty rooms in the castle, why must Potions be taught in the underground classroom?" I asked Sylvia.

"That's because some potions need to be boiled away from light," Sylvia said without thinking.

"how do you know?"

"My mother is a pharmacist. She sometimes gets up in the middle of the night to make potions, which often scares my father. He's a Muggle." Sylvia smiled and said, "You don't know anything? "

When I was about to speak, the class bell rang, the classroom door creaked, and a black-haired middle-aged man walked in.

The man was dressed in a dark green robe and looked no more than 40 years old, with deep eyebrows and a calm demeanor.

"Salazar Slytherin," he said his name calmly, and with one hand waved back, the spelling appeared on the blackboard, "Your current and future Potions teachers."

He is obviously just a teacher standing on the podium, but he has a condescending aura, with a distance, but not arrogant.I stared at the person on the podium, and I didn't know why there was a feeling of deja vu.

"Potions is an exquisite subject..." He looked around for a week before continuing.While introducing the basic situation of the subjects he taught, he paced slowly in front of the classroom.His voice was gentle and powerful, but his eyes never stayed on the students, as if he was completely immersed in what he was saying.Occasionally, I tap my temples with two fingers, meditate for a moment, and carefully consider the choice of every word in every sentence.

Must be a picky teacher, I thought so.Facts have proved that my judgment is correct.

After the potion production started, he would stop at each table for a while, but he rarely spoke, just quietly examining the details of each operation.Most people will realize the problem after being stared at by him for a few seconds. If not, he will simply give some tips to avoid too dangerous accidents.

For a while, the underground classroom was so quiet that there was only the sound of tumbling medicine.

He walked up behind Sylvia and me, and I could feel his eyes follow my hand.My palms were sweating from nervousness, so I put down the weight pretending to be calm, stared at the pointer on the balance without moving, and lowered my head to carefully weigh and grind the dried nettles.After about a century, Professor Slytherin walked away without saying a word.Sylvia breathed a sigh of relief, her stiff shoulders visibly relaxed.Although I don't know if I made any mistakes, as long as he doesn't stare behind me, half of my hanging heart will be relieved.

At the end of the timer, Professor Slytherin began to accept our results.

"...Miss Burns's potion reversed the order of adding the ingredients, and a small oversight led to serious consequences. So unfortunately, this is not the potion I asked to make today...

"...Mr. Hand's snake tooth powder is added in too much amount, so it will produce certain side effects that cannot be eliminated..."

He stood on the podium with his hands resting on the edge of the table, and every time he looked at a table, he accurately pointed out the deficiencies of each of them, in every detail.His tone was not harsh, but he saw and remembered all the small mistakes that even the students themselves did not remember, which was really embarrassing.

"Finally..." he said softly, his eyes fell on Sylvia and I's table, "Miss Ravenclaw and Miss Smith's potions are more interesting."

The heart I had just let go lifted up again, what is 'interesting'?

He strode off the podium and came to our table again. "These two scabies potions are almost perfect. It's really hard to see the difference without carefully distinguishing them." He reached out, picked up the stirring spoon, and stirred a few times in my cauldron. Stir several times in the crucible. "Perhaps because of a little impatience, Miss Smith's potion was not cooled as thoroughly as Miss Ravenclaw's before adding the porcupine quills, so her potion was thinner than Miss Ravenclaw's. This made her potion less practical. The potion is far less effective than Miss Ravenclaw's. Although there is no problem with the formula and process, the effect of the potion is affected. This is the essence of potion science. No matter how small a detail is, it will have a huge impact on the potion, so Said that no one can brew the exact same potion twice. I hope everyone remembers this, this is the first lesson before starting to learn potion making."

After class, Sylvia and I wash the cauldrons by the sink.Sylvia remained silent, looking a little dazed.

"Are you okay?" I asked cautiously.

"It's all right," she shrugged, less talkative than usual.

"Actually, your potion is also very good, Professor Slytherin said..." I felt a little guilty.

"But yours is better after all." Sylvia straightened up and said, her face became clearer, "It's nothing, don't worry."

"sorry."

"Helena, you didn't do anything wrong. Why do you always apologize?" Sylvia smiled helplessly, "I'm fine. Really."

Looking into her sincere eyes, I don't know what else to say.

Hope it's all right.