"Similar side effects appear if the correct ingredients aren't added?"
Professor McGonagall and Professor Flitwick exchanged a look. From what Vizet had said, they could vaguely guess what kind of potion he was talking about.
Professor Flitwick set down his almond biscuit, a subtle light flickering in his eyes. "Vizet, are you talking about Polyjuice Potion?"
He and Professor McGonagall had both personally lived through the English Wizarding War, and in that cruel war, Polyjuice Potion had once been widely used.
Because of that, he and Professor McGonagall understood the effects and uses of Polyjuice Potion quite well, and they also knew exactly what consequences would arise if the final ingredient were not added correctly.
Polyjuice Potion was an extremely complicated potion, requiring an entire month to finish brewing.
Once brewed, Polyjuice Potion's duration varied depending on its quality;
the poorest-quality Polyjuice Potion could only take effect for ten minutes, while the best-quality Polyjuice Potion could last a full twelve hours.
Although the brewing process for Polyjuice Potion was complicated, the method of using it was very simple.
When using it, one only had to add bodily tissue from the person they wanted to become, and their appearance would completely transform into that person's.
There were many choices for this so-called "bodily tissue": hair, nails, skin, and blood could all be used, though under ordinary circumstances, hair was usually chosen.
When adding the "bodily tissue," there was one more point to note: one had to ensure that the "bodily tissue" obtained truly belonged to "that person," and was not nonhuman "bodily tissue."
If someone drank Polyjuice Potion that had been mixed with animal "bodily tissue," they would turn into a half-human, half-animal form, and it would take a long course of treatment before they could recover.
"Professor Flitwick, I'm talking