The Boggart conscientiously played the role of a "Dementor," drifting back and forth around Vizet as it continued making that hair-raising "huh-huh" sound.
Vizet was not affected by the Boggart. He paced slowly in front of the blackboard, his gaze calmly sweeping over the students and guests present.
"The Boggart Banishing Charm and the Patronus Charm are the spells that counter these two Dark Magic creatures."
"Let's start with the Boggart Banishing Charm. It requires us to use our imagination, to picture the thing we fear as something ridiculous, and to drive the Boggart back with happiness and laughter..."
"As for the Patronus Charm, it requires us to focus our attention and recall a memory that is either the happiest or the most inspiring to you, using that as the basis to drive away a Dementor..."
While Vizet was speaking, the ring of students closest to him were actually affected to some extent as well. At first, they could faintly feel a bone-piercing chill, and then their hair began to stand on end.
But that bone-piercing sensation quickly changed in nature. As Vizet continued his explanation, to that ring of students, the "Dementor" played by the Boggart no longer gave them a terrifying feeling.
In the eyes of those students, the cloaked figure drifting in midair now looked more like a huge black pet eager to show off, wagging its head and tail as it craved attention.
After that thought popped into some of the students' minds, the corners of their mouths began to rise uncontrollably, and it took them a great effort to hold their laughter back.
The Boggart changing from a balloon into a Dementor let the guests completely confirm their earlier judgment.
What Vizet had mastered was indeed an extremely profound form of Occlumency, allowing him to