New Ideas for the Quidditch World Cup

"All I can say is... the normal process of brewing potions wouldn't be that simple," Professor Lupin said in a somewhat complicated tone. "This is a special situation..."

He knew very well just how difficult it was to make comprehensive improvements to Coolick's formula the way Vizet had.

It involved Potions and Herbology, and also required combining Arithmancy to make corresponding improvements to certain steps that required Wand intervention, so the adjusted formula could be properly adapted.

After the Coolick formula had been thoroughly improved, even a first-year who had only just received a Wand could follow the instructions on the cauldron and brew Coolick concentrate of acceptable quality.

Neville and the others had once all been his students, and he really did not have the heart to say anything that might discourage them.

"But there's still one problem that hasn't been solved." Sirius Black picked up the Crystal Jar. "That's the dilution ratio for this concentrate."

"I've already finished that..." Vizet snapped his fingers, and five Amethysts flew out of his pocket, floating in midair.

Neville and the others curiously examined the Amethysts, and discovered that inside them, there was also a wisp of leaping Black Mist hidden away.

Vizet could control Coolick's dilution ratio. Referring to the production principles of the "Parseltongue Whistle," he had not completely separated the Obscurus.

By not completely separating out the Obscurus, he could use its connection to the main body to preserve Coolick's related memories within the Amethysts.

Through this method, the Coolick concentrate could be tested, and according to the possible differences between different batches of concentrate, the corresponding dilution ratio could be given.

In the end, this was one use of the soul. Although it seemed completely non-aggressive, it could be used very well to solve problems.

This was also