At some point, Professor Quirrell suddenly appeared in front of Harry. He had shed his usual timid, nervous, stammering manner. It was as though he were shrouded in a layer of frost, radiating waves of chilling cold.
His lips trembled slightly, veins bulging on his tightly clenched fists. He was furious, roaring endlessly in his heart:
"How dare he ignore me, as if I were some insignificant invisible person? Why is everyone's attention focused on him, while I'm utterly dispensable?"
Seeing that Harry showed no reaction after he shouted in anger, merely staring at him with deep eyes full of mockery, Quirrell could not help roaring again:
"Potter, answer me! Did you hear my question just now? What is the Imperius Curse? What are its characteristics and effects?"
Harry was somewhat impatient. He had no idea what madness had taken hold of Quirrell, interrupting his study of magic.
Didn't he know the level of his own teaching?
Harry decided to use this opportunity to teach Quirrell a harsh lesson and make him settle down a little.
He should have just waited quietly for death to come. Was there really any point in jumping out to make a fool of himself?
Harry answered blandly, "The Imperius Curse is one of the three Unforgivable Curses. It can control a person's thoughts and actions, causing the victim to act entirely according to the caster's wishes, losing their self-awareness and ability to act independently."
Even though Harry had answered, Quirrell had clearly come looking for trouble and had no intention of ending things there. A sinister glint flashed through his eyes as he raised his voice and asked again:
"When faced with Avada Kedavra, what is the best defensive method?"
"The best method is to evade it as much as possible, move quickly, and