Felix stroked the greenish snake skin in front of him and thought about the production method.

'First, you need to deal with impurities, this step can be referenced from the Binding Vine operation, however, the characteristics of basilisk and Whomping Willow branches can be completely different ...'

...

February 14 Valentine's Day.

When the little wizards got up early to go to the great hall for breakfast, they found that all four walls were decorated with dazzling pink flowers, and much heart-shaped confetti kept falling from the light blue ceiling.

Even the normal corridors were decorated with canopies of wintergreen and mistletoe.

Many young male and female wizards were grinning and smiling silly during the meal.

During this day, the professors turn a blind eye and don't meddle much - but don't expect them to smile at you as well.

"I think Percy must be sour when he sees this," Ron said, pointing to a few couples holding hands in the distance - he and Percy have made up, but not without the habit of taunting him a little.

But all this had nothing to do with them, Harry, Ron, and Hermione ate breakfast and hurried to class.

Evening arrived.

They dragged their tired bodies to the great hall, and the long table was already filled with many young wizards.

Not surprisingly, they saw the dwarfs dressed as the cupids, albeit they were standing on a makeshift platform, grimly playing the harp - not unpleasant, at least there was no impulse to flee.

The two shortest-looking dwarves, who seemed to have yet to master the art, stood two or three meters near the doorway of the great hall, and from their pockets pulling out a handful of coloured flakes which would be thrown at anyone passing them in as a duo.

Harry and the group then saw Dean and Neville, who were walking in front of them, bathed in a rain of coloured flakes, with Neville standing awkwardly in place and Dean letting out a grunt of unknown meaning and quickly running away.

A roar of laughter erupted from the long table.

Neville scratched his head and laughed along, his round face tinged with a blush.

Harry, Ron, and Hermione hurried around the corner to avoid the pair of dwarfs.

Soon, an unknown duo got hit, and if it is a couple, they will laugh graciously, which is not embarrassing, but if it is purely friends, the expression on their faces is enough to make the little wizards on the sidelines laugh for half a day.

On the teachers' table.

Belby looked at this lively scene, somewhat surprised to said: "I did not expect, now Hogwarts celebrate Valentine's Day? You know, I was sneaking around back then."

Felix said, "Maybe it's meant to welcome you."

"Don't be ridiculous, Felix." The middle-aged male wizard said, turning his head to look around, "How come I missed Professor Snape?"

"He wouldn't like this sight, he would probably be a little late."

"Yeah, he looks pretty serious." Belby said, "The last time we met it was too brief, we didn't talk much in detail, he had some very insightful ideas ..."

"Was it about the Wolfsbane potion?"

"That's right, he seems to have thoughts on improving the Wolfsbane potion, I hope we can collaborate, and I'm willing to provide the initial research information."

"Didn't you think of inviting someone else before?" Felix asked curiously.

"I thought about it, but ... not many were interested," Belby said regretfully, "Professor Slughorn did offer some suggestions, but he refused to get involved."

"Slughorn?" It wasn't the first time Felix had heard of him.

"Yeah, he used to be my potion professor, but now that he's retired, and his whereabouts are uncertain, it's hard to get in touch with him."

After ten minutes, other professors also arrived one after another.

Professor Filius sat in the empty seat next to Felix, and Professor McGonagall sat down next to Filius.

Snape chose a seat far away.

Just when Harry got bored with listening to the dwarfs playing the same song for the seventh time, the dinner finally started.

Dumbledore tapped his glass to silence the young wizard, and he introduced their new professor to the crowd with a big smile on his face.

"I have the honour to introduce you, Damocles Belby, who has graciously agreed to fill the vacancy for this year's Defense Against the Dark Arts class."

The young wizards applauded sparsely, the preceding professors already consumed with their enthusiasm.

Belby stood up and bowed to the crowd, "It is an honour to return to Hogwarts after so many years. Although I will be here for only six months, I will do my best to fulfil my duties ..."

Belby's words were very sincere, and the fact that he didn't look and dress as glamorous and desperate to catch everyone's eye as Lockhart did directly wooed the limited goodwill of the young wizards.

The most visual evidence of this was the neat and loud applause from the young wizards when he sat down.

Snape, sitting on the edge, stared coldly at the goblet in front of him.

The other professors were all enthusiastic and happy, despite the fact that Belby had won the Order of Merlin with the invention of wolfsbane, and wanted to teach Defense Against the Dark Arts, at least he had some real talent.

It's better than Lockhart, who has been organizing a pyjama party.

A variety of food appeared on the long table, and the tired young wizards began to eat.

Professor Filius, who is sitting next to Felix, talks to him in a small voice.

"Felix, I heard that you are using a new type of teaching aids in your class?"

"That's right, Filius, I call it Answer Parchment."

Professor McGonagall, who occupied the next seat, did not move but slowed down the speed of chewing food.

"You don't mind if I ask this - I saw it from a student, and I found it very useful for magical charm theory as well."

"You're thinking of using the answer parchment in a charm class?"

Filius stammered, "There are only a few months left before the final examination, but the theoretical results of some young wizards are still worrying."

He looked at Felix, "If there is anything you need from me ..."

Felix smiled softly: "Filius, I have no problem with that. However, I did run into some difficulties - if I want to add more disciplines, I definitely have to improve on the original, which is not something I can solve all by myself, and I would like to invite you to work on it with me."

"I'd be more than happy to do so." Filius said readily.

Professor McGonagall found the right moment to pick up and said, "I can also help."

Felix said, "Minerva, I have envisioned adding all the Hogwarts disciplines, but it would take a professor of distinction to make this happen."

Professor McGonagall thought for a moment, "I will find out what others think, and that is a good thing. But how are you going to unite so many disciplines on a single parchment?"

"Using synchronization enchantments," he explained, "the parchment in the hands of young wizards is just a simple magical artefact that receives information, and the magic rune and alchemical means laid out on it are relatively simple. I also have a scroll made from dragon skin, which stores the every grade exam questions of recent years."

"But this also result in young wizards can only use the answer parchment at Hogwarts."

"Well, one-to-many? ...." Filius mused, " That kind of idea seems to be something I've heard from someone before."