Dumbledore extended his withered fingers and accepted the vial.
Candlelight refracted into scattered specks across his half-moon spectacles. He narrowed his wise blue eyes and gently turned the glass tube.
Several dark purple crystals floated in the amber liquid, lightly clinking together with each movement and producing a faint sound like wind chimes.
Dumbledore opened the test tube and smelled it carefully. He roughly guessed the potion's effect, and his eyes suddenly lit up.
Still, he asked Harry for confirmation.
"Harry, this potion is?"
"Werewolf Potion!" Harry looked rather pleased. Having invented this Potion Recipe in such a short time, even he felt a little proud. "Its purpose is to make werewolves controllable. It can not only remove the infectious nature of lycanthropy, but also allow werewolves to transform at will at any time while retaining sufficient reason."
At this point, Harry paused before continuing.
"However, it isn't without drawbacks. After transforming into a werewolf, their intelligence declines to a certain extent, and their temper becomes more violent. But all of that can be controlled."
Dumbledore's long silver-white beard trembled slightly. The blue eyes behind his lenses suddenly shone like two flames being kindled.
"Incredible..." he murmured, looking up at Harry. "Harry, do you know what this means? Ever since the werewolf curse emerged, the Wizarding World has spent six whole centuries trying to solve this problem! And you..."
Though he knew Harry was an extraordinary young wizard, Dumbledore still found it difficult to calm the emotions in his heart after learning the specific effects of the Werewolf Potion.
Harry's lips curved upward slightly. Being praised by the greatest White Demon King of the age felt quite good.
He revealed his trademark smile.
"Professor Lupin is a werewolf, right?
The moment I first saw him, I noticed something unusual about