Besides Professor McGonagall, Kael also needed to visit Professor Flitwick and Professor Sprout’s offices, as each house had students aspiring to enter the Ministry of Magic.

However, for Slytherin, it seemed Snape didn’t think they needed Kael’s advice, which saved Kael quite a bit of time.

During the following period, he was almost daily shuttling between the three heads of houses’ offices, busy beyond measure, even during class hours.

The professors seemed to believe missing a few days of class wasn’t a big deal for Kael, so it wasn’t until three days after the semester started that Kael finally re-entered the classroom.

"You’re late," Snape said with a stern face, his voice colder than the February underground classroom.

"Sorry, I just came from Professor Flitwick’s office," Kael explained, "I thought he had mentioned it to you."

"Ah, yes..." Snape drawled, "Senior Ministerial Assistant, sitting in such an important position before even graduating, how extraordinary."

His voice carried a hint of sarcasm.

"What are you dawdling for, do I have to ask you to take your seat?"

Kael hurriedly walked to the only empty table and sat down, and just as the nearby Conna turned her head to say something, Snape’s voice interrupted.

"Universal Antidote... a more effective antidote, capable of solving some damages caused by Dark Magic..."

He waved his wand, and the preparation steps immediately appeared on the blackboard.

"What you need is still in the cabinet, but please note, since unicorn horns are expensive, each person can only take one portion..."

"Although I don’t think anyone here would make a basic mistake, if any of you truly waste this material, you will have to purchase it yourselves."

Everyone lined up to the cabinet to collect the materials they needed, and Kael also got his share,

a piece of Dung Stone, a bag of mistletoe berries, a small bottle of Murtlap essence, and a cut slice about the size of a Galleon.

"I thought it would be a whole horn, but it’s just this little piece," Kael murmured, but seeing Snape’s cold glare, he quickly shut his mouth.

Thinking carefully, it’s not surprising. According to "Advanced Potion Making," brewing a Universal Antidote requires an entire unicorn horn to achieve its greatest effect, but the school obviously wouldn’t allow such extravagance.

After all, even an empty horn, with just the outer shell made into a horn in Diagon Alley costs twenty-one Galleons. If everyone had one, the class cost would be too great, and the governors would never agree.

Moreover, for students brewing the Universal Antidote for the first time, these materials are enough. By five minutes before the end of class, only three people had finished successfully; others had more or less made mistakes.

This kind of potion certainly couldn’t be used. Even using a whole unicorn horn would be a waste.

"How is your preparation going?" Kael asked Conna beside him as they left the underground classroom, "Are you planning to go for The Most Extraordinary Society of Potioneers’ exam right after the school year ends?"

"Professor Snape mentioned it," Conna said while stuffing two thick books into her bag, "He also said to brew various potions in the coming days and to familiarize myself with the processes, without any pause.

"Oh, he also asked me to organize the latest discovered potion formula as soon as possible... This is the first step to entering The Most Extraordinary Society of Potioneers."

Kael nodded, he had heard of this, The Most Extraordinary Society of Potioneers indeed had this requirement, valuing a wizard’s talent in potion application rather than just bookish learning.

This is just like the paper for "Today’s Transfiguration Technique," not needing to be astounding but must have personal understanding.

"Do you need my help?"

Kael asked, "I have Basilisk venom and Snake Shedding here, materials that haven’t been around for a long time. Adding a variety of things casually can create a new potion, ensuring you pass the exam without any chance of duplication risk.

"Besides, I might also get Phoenix’s Tears, but that may have to wait until Professor Dumbledore returns."

"No need," Conna shook her head, "In fact, I completed the new potion formula before Christmas, and Professor Snape also reviewed it, he thinks it’s completely up to standard.

"So, I only need to master more potion knowledge now.

"I remember last year’s selection test had a very obscure question... Merpeople Potion, that year no one passed the exam, everyone failed."

"Merpeople Potion?" Kael couldn’t help but say, "Did the people applying for The Most Extraordinary Society of Potioneers last year somehow offend them?"

This is a potion that allows a wizard to grow a fish tail and breathe freely in water.

Honestly, this kind of potion is rarely used even in the United Kingdom, not to mention the entire Magic Realm. And even if there was a need, they could directly use Gillyweed instead, there’s no need for an additional step.

Usually, only those wizards who want to disguise themselves as Merpeople would use this kind of potion...

By the way, Merpeople are human-bodied with fish tails, mostly striking in appearance, entirely different from the hideous Merpeople in the Black Lake who have no friends.