Hermione was still struggling, and Harry raised his hand tremblingly.

"Very good, Potter, whether it succeeds or not, I give you ten points for your courage." Felix nodded with satisfaction, and he looked at the others: "He needs an assistant to make him think of something happy through words. Are there any volunteers?"

Many people from Gryffindor raised their hands.

But Draco also raised his left hand: "Oh, Professor, I'm willing to try. Potter, I have something to say to you, you won't dare, right?"

Harry said fearlessly: "It's you, Malfoy."

The two stood face to face.

"I dare say my words will make you cry, Potter." Draco laughed in a low voice, his voice deliberately lowered.

Harry stared at his platinum hair and said: "You can try."

Draco narrowed his light eyes: "You should have heard of Sirius Black's name?"

"So what?"

"Haha, Potter, if I were you, I would definitely take revenge at all costs..."

Harry's heart tightened, he knew! He knew that Sirius Black was a good friend of my father! But why did he use the word "revenge"? He suddenly thought of something, and his stomach churned.

But he said 'calmly': "What do you want to say?"

"Oh, Potter!" Draco grinned, his eyes flashing with malicious light, "Your parents, how did they die, you still don't know? So pitiful, surrounded by lies."

"I know." Harry said suddenly.

"What?"

"I know everything, Black is a Death Eater, he surrendered to Voldemort, a wise choice... just like your father did back then." Harry suppressed the terrible thoughts that arose in his heart. His current task was to fight back. He must not show a cowardly expression in front of the enemy.

"What did you say?" Draco shouted in a low voice.

Harry said expressionlessly: "You know what I mean, the fence-sitter family, everyone knows what kind of stuff you are, right?"

Draco's pale face turned ruddy because of anger, "How dare you! Potter..."

"What's there to be afraid of?" Harry smiled happily. He was suffocated by the sudden surge of suppressed emotions. He had to find a channel to vent, otherwise he would shout desperately.

He came close to Draco, so close that Harry could even see his flared nose. He whispered in a low voice: "Malfoy, your family are all lackeys of Voldemort, worse than any pure-blood family with backbone. You think you are worthy of pride? But you are wrong! The shame of the Malfoy family will accompany you for the rest of your life!"

"You, you..." Draco's mind was in a mess, and he retorted loudly: "My family is not lackeys of the mysterious man!"

Everyone looked at him in surprise. They could only hear the two people whispering before.

But at least they heard this sentence clearly.

"Really? You shout Voldemort." Harry also opened the volume so that everyone could hear what he said.

The whole class became silent, dead silent.

Felix waved his wand to let the two people separate a little. "Okay, the test is over. Potter, Malfoy, go back to your seats."

The others looked at the golden peephole above the table, which was flashing a dazzling light.

Amid Ron's excited voice of "Well done, Harry!", Harry sat down again. He was now in the mood to think carefully about the thought that had just flashed through his mind.

Revenge, revenge, what can be considered revenge?

Unless Sirius Black did something wrong to him first.

The information he had received from Hermione before was just that Black and his father were good friends at school and had violated many school rules together. He, Hermione and Ron speculated that the relationship between the two people had completely broken down and became enemies when Black joined the Death Eaters.

And Black escaped from prison to hunt him down in order to restore the power of his master Voldemort, just like Professor Quirrell in the first year. There was no personal grudge here.

But Harry found that he was wrong, very wrong.

From Mr. Weasley's attitude to the "revenge" mentioned by Malfoy, he suddenly had an incredible idea.

Harry finished the class in a daze. Even when Professor Happ asked everyone to come forward and choose their favorite magic puppets, he just picked one at random.

Hermione was happily hugging a puppet with ice blue hair. She saw the expression on Harry's face, "What's wrong with you, Harry?"

"Nothing." He stumbled away. Ron shouted, "Where are you going? We should go to the hall for dinner." But he didn't pay any attention. He carried his schoolbag in one hand and the black-haired puppet in the other hand and went straight back to the dormitory.

The dormitory was empty. He opened the box under the bed and pushed the clothes on the top pile aside until he saw a leather-bound magic photo album - it was given to him by Hagrid two years ago, and he would look through it from time to time.

Harry couldn't wait to open it, the first page, the second page, and then his breath stopped.

His eyes stopped on the photo of his parents on their wedding day. His father smiled and waved at him, and his mother's face was full of happiness, and their hands were linked together.

Next to his father was a handsome, smiling man with black hair. His face was not sunken because of being in prison, and his hair was not tangled, but Harry recognized this person at a glance -

Sirius Black!

Harry felt dizzy and his heart began to pound. His stomach was churning, even more intense than the feeling after being trained by Professor Happ, but he was suddenly overwhelmed by a strong emotion.

The thought of revenge continued to gnaw at his heart, and he grabbed the wand at hand and clenched it tightly.

'Maybe I should walk out of Hogwarts, find that person, and then... kill him! '

But this thought was interrupted, "Harry!" Ron and Hermione walked into the dormitory, looking at him with worry.

Harry's tense heart relaxed and he exhaled deeply.

...

Later that day, Felix planned to go see Hagrid. During the Forbidden Forest adventure last year, he saw a lot of magical creatures, maybe he could recommend them to Hagrid.

For example, a baby unicorn, or a silly-looking flower fairy.

But a phoenix with gorgeous feathers appeared in front of him. He looked at it in surprise: "Fawkes? Is it Dumbledore who is looking for me?"

The phoenix nodded, and it landed on Felix's shoulder. After a dizzy moment, he appeared in the headmaster's office.

Dumbledore was sitting behind a long-legged table, dressed very formally, as if he was about to go out, or had just returned from outside. His expression was very serious, and he smiled only when he saw Felix.

"Felix, forgive me for calling you here so late."

"What's the matter, Dumbledore?"

"I heard about the seven types of peepholes you introduced in class... One of them can be used to detect specific people?"

"Yes, but it requires the person's hair, or body tissue or something." Felix replied, and he was also thinking about Dumbledore's intention.

"It just meets your requirements." Dumbledore lifted a piece of red cloth, and a few black hairs lay on it.

"This is..." Felix already had a guess.

"Sirius Black's hair." Dumbledore lowered his eyes and said in a deep voice.