New Ideas for the Quidditch World Cup

"It could only be said that... the normal process of brewing a potion wouldn't be this simple." Lupin spoke in a somewhat complicated tone. "These are special circumstances..."

He knew perfectly well just how difficult it was to make comprehensive improvements to the Coolik formula, as Wizet had done.

It involved Potions and Herbology, and also required Arithmancy. Any steps requiring a wand also had to be modified accordingly to suit the adjusted formula.

After the Coolik formula had been thoroughly improved, even a first-year who had only just received their wand could brew a batch of Coolik base liquid that met the required standards by following the instructions on the cauldron.

Neville and the others had all once been his students. He truly could not bear to say anything that might discourage them.

"However, there's still one problem that hasn't been solved." Sirius picked up the crystal jar. "The dilution ratio for this base liquid."

"I've already finished it..." Wizet snapped his fingers, and five amethysts flew out of his pocket, floating in midair.

Neville and the others examined the amethysts curiously and discovered that each one contained a wisp of writhing black vapor.

Wizet could control Coolik's dilution ratio. Drawing on the principles behind the Snake Language Whistle, he had not completely separated the Obscurus.

By not completely extracting the Obscurus, he could use its remaining connection to the original body to preserve the memories related to Coolik within the amethysts.

This method allowed them to test the Coolik base liquid and provide the appropriate dilution ratio according to whatever differences might exist between batches.

Ultimately, this was one application of the soul. Though it appeared entirely non-aggressive, it could be used exceptionally well to solve problems.

This was also what Wizet had said before: the charm of