Kicked out of the office, McGoth clutched his left arm and stood at the door crying without tears.

He is revenge, Chi Guoguo's revenge. Magos gritted his teeth in frustration, otherwise how could the question of the negative elixir of the year before happen to be what experiment to do at this time, or after the Potions class just now.

Feeling the residual tingling, McGoth wished he could have the power to crush Snape now, then immobilize him as well, and then give him a taste of the powerlessness with a larger syringe.

After slamming him at the door, McGoth sighed and had to face the fact that he wouldn't have a chance to take revenge for years.

I just hope that my blood will not be wasted, and at least some effect will have to be studied. ’

Thinking of this, he was suddenly stunned, if he failed to research anything, would he trick him into drawing blood again, or even ...... Slice?

McGoth was horrified to find that this possibility seemed to be quite high, and what was even more terrifying was that he didn't seem to have any room to resist. He couldn't help but think back to the huge needle just now and the faint pain, and he couldn't help but shudder, thinking if he should go to Professor McGonagall or Professor Flitwick or Dumbledore for help? But he remembered that someone had said that occasionally donating blood was good for the body, could the wizarding world do the same? Don't they go on his side and 'mess up' with Snape?

It was a wonderful picture that he didn't dare to imagine it. Temporarily dispelling this thought, he glanced at the door of Snape's office again, and finally couldn't help the desire for revenge in his heart, and drew a big husky dog head on the door with his wand, looking at Erha with a serious face, he got the idea, and then hurried out of the basement.

Sitting inside, thinking about how to use this cartridge of blood, Snape felt the magic fluctuations outside the door, narrowed his eyes, took out a large syringe again, and waited for Magos to break through the door, but after the magic dissipated, he seemed to run away. He looked at the gate thoughtfully for a moment, then lowered his head and decided not to care what he was doing at the gate.

Well, now there's another reason to force a blood draw.

McGoth obviously didn't know what Snape had decided about what he was doing on the door, and if he had, he didn't know if he would have the guts to paint that picture on it.

Just as he was wondering if he needed to make up for it, he collided head-on with Filch.

McGoth subconsciously looked at his watch, and when he saw that it was only eight o'clock, he smiled at him and prepared to pass by him.

"Mr. Will." Filch suddenly stopped him.

"Is there anything wrong, Mr. Filch?" McGoth asked, turning his head.

Filch opened his mouth again and again, trying to say something but being embarrassed to speak.

McGoss's curiosity was rising, and it was the first time he had seen Filch with this expression.

"Is there anything I can help with?" He asked tentatively.

Filch's face changed several times, and finally led McGoth to his office on the first floor.

McGoth looked at the dark room with only one oil lamp and wondered how he got used to being here. With the faint light, he looked around the office, and saw a row of wooden cabinets lined up around him, I don't know what was in them, and a set of shiny nooses and handcuffs, shackles and other things on the wall, so that everyone he saw was suitable for staying here.

Filch graciously dragged an old, dusty chair out of the corner for him to sit down.

McGoth felt flattered, he didn't know if he was the first little wizard to be treated so politely by Filch, he hadn't heard of any other little wizard who had been treated like this.

"I'd like to ask you for a favor." Filch was silent for a few seconds after seeing McGoth sit down.

"Please say if I can help." McGoth didn't dare to say anything about it, in case he asked him to sell the twins or something.

"That's right," Filch paused, then finished in one breath.

"I've heard that you discovered a way to increase your magic when you were in your first grade, and I want you to coach me."

Looking at Filch's expectant gaze, McGoth was stunned for a moment, and then slowly recalled the incident that he had left behind.

"You're talking about the thorn?" McGoth asked uncertainly.

"Yes, that's it." Filch's gloomy face suddenly burst into anticipation.

McGoth now knew a little bit of what he was thinking, and he hesitated.

"That method was vetoed by Headmaster Dumbledore, who said it had a big side effect."

"I'd like to give it a try, and I hope you'll give me that thorn."

McGoth didn't dare to do this, since Dumbledore had said that the side effects were big, if he tried it and had an accident or even a burp, then he would be miserable. Just said to go back and think about it, and then asked him how he knew about it, it stands to reason that he either didn't know, and if he knew, he would have known.

Filch shook his head and didn't answer him, but told him that it wasn't too early and told him to go back first.

On the way back, McGoth could understand Filch's determination to become a real wizard, but he couldn't just agree to his request because of this, hesitated for a while, he felt that it was better to tell Dumbledore about this matter, in case he didn't get the desired result from him, what if he went to find someone else, although he didn't know much about the little wizard, but it would be troublesome if anyone said that he leaked, and he was really curious about how Filch knew, he felt that no one would run to him to tell him.

Back in the Headmaster's office, Dumbledore saw that his expression was the same as before, and asked in a brisk tone why he had come again, as if the previous conversation had not happened.

McGoth told him directly about Filch.

"I didn't know what to say to him, so I dragged it off, and I didn't know if it would be dangerous for him to do so."

Dumbledore pondered for a moment.

"I didn't expect him to have such determination, I know about this matter, tomorrow you give him the assassin, instead of letting him do experiments secretly, it is better for me to watch him do it, at least it is much safer."

Now that Dumbledore already had an idea, Magos agreed directly.

The next day, after the morning class, McGoth went to Filch's office with the cage for the Thorn Guy, Filch seemed to see the hope of becoming a wizard after seeing the Thorn Guy, he thanked Magos for a while with a stiff face, and then hurriedly left with the cage.

Seeing this, McGoth also quietly followed, only to find that he was actually walking in the direction of the Forbidden Forest. This made him wonder if Hagrid had said something wrong, and when he thought about it, it seemed that this possibility was still the greatest.