The eight eyes of the Acromanthus trembled in unison, and its two large claws seemed to have touched a switch, making a continuous "click, click, click" sound.

"Hmm... let's test the magnification ability again."

Felix first knocked it out with a stun spell, then used his wand to pick up a ribbon of blue magic and threw it on the ugly head of the Acromanthus. Under his control, the Acromanthus' body quickly expanded, ten feet, twenty feet, thirty feet.

Felix stopped and walked around it.

'It's OK to magnify it, this magic is completely under my control.'

'But it always feels useless.'

Felix observed this scene. Who would enlarge the enemy on the battlefield?

To turn the opponent into a dazzling target?

There is obviously a better way.

Felix restored the Acromanthus to its original state, and after a thorough inspection, he shrunk it down to the size of the tip of his little finger. He took out an ordinary transparent glass bottle from his ring and put it in it.

"Mr. Acromantula, please stay with me for a while."

Then he waved his hand to disperse the spherical vortex. Ten seconds later, eleven giant spiders were lying around him. They

seemed to be dizzy.

He carefully left magic marks on three of the Acromantulas. With these marks, he could find their nests directly.

The place where the Acromantulas were entrenched was still too close to the school. Judging from their reckless attack on humans, the danger was too great. It would be better to move them farther away.

It would be good to keep the troll company, just at the other end of the Forbidden Forest.

But not today, he just had a better idea.

...

An hour later, Felix knocked on the door of Hagrid's hut with a three-headed little black dog in his arms.

Hagrid seemed to have just finished his meal, with ketchup on his beard, and humming a little tune.

He opened the door and laughed heartily: "Felix, your suggestions are very useful, and the students have a good response... Wait!" He suddenly roared, and his eyebrows and beard trembled.

"Lu... Fluffy..." Hagrid's eyes were filled with tears.

Felix looked at him with a smile, "Yes, I gave Fluffy..."

"... actually have a child!"

"Huh?" Felix looked at Hagrid with a lot of question marks in his mind, and his head began to hurt again.

The next second, he was pulled in by Hagrid's big hand, "Come in quickly, don't let the little guy catch a cold."

Hagrid pushed him to the chair, and his burly figure kept turning around in the hut, muttering: "Let me think... let me think... what does the three-headed dog need when he was a child? First of all, there is a stove, and raw meat, and there is just a little left of Fang... How can there be no music! His father likes me to play the flute for him the most. Oh my God, Fluffy actually has a child, and I was completely kept in the dark!"

Felix was stunned for more than ten seconds before he figured out the reason for the matter. He interrupted the busy Hagrid with a smile: "Hagrid, do you remember my magic? In the summer vacation, let a magic wand tree become a potted plant?"

Hagrid slowly stopped and said in an uncertain tone: "Of course I remember, don't tell me..." He looked at the little black dog in his arms opposite him. It was wagging its tail wildly and looking at him pitifully.

He felt a strong sense of familiarity.

"Yes, I brought Fluffy to you. I keep my word."

Hagrid grumbled incomprehensibly, then took the three-headed dog from Felix's arms and came close to examine him carefully.

The little guy was only half a foot tall, not even half of Hagrid's palm. It was covered with black silk, and its three heads were only the size of walnuts, making a "woohoo" sound of grievance.

Hagrid's hands began to tremble, "It's really Fluffy, look at his paws and nose, his second head is a little small, and it was even smaller when he was born. I thought he was deformed..."

Fluffy, the three-headed dog, returned to the arms of his "old father", and his four fleshy paws clung to Hagrid tightly.

Fluffy's three heads greedily breathed in the smell of Hagrid, and after a while, it suddenly turned its head and barked at Felix.

It was this bad guy! He suddenly appeared and turned himself into a tiny thing!

"Ouch!" Hagrid laughed even more happily, "He barked like that when he was a kid, learned from Fang, but when he was twice as big as Fang, he stopped barking."

"As long as you're happy, Hagrid, I don't know if I did the right thing, I didn't think too much..." Felix said.

"You're too polite, this is exactly what I want!"

As if seeing that Hagrid couldn't stand up for him, Fluffy became completely obedient, and it lay on Hagrid's shoulder, which was particularly spacious for it now. After a while, its three heads began to fight for the raw meat that Hagrid handed over.

"Slow down, slow down, it's all yours." Hagrid said with a smile.

Before leaving, Felix rarely remembered to remind him: "Hagrid, if Fluffy grows to one-third of its normal size, you have to send him back, because he will recover very quickly next. I deliberately strengthened the strength of the spell, I think you can spend about a week with him."

"Got it, got it." Hagrid said contentedly.

Coming out of Hagrid's hut and walking back to the castle, Felix suddenly remembered that he still had an eight-eyed giant spider hidden in his pocket.

He couldn't help but hesitate. He didn't want to go back.

Otherwise, just snap it... no one saw it anyway...

But in the end, Felix still took it back to the office.

Lying on the sofa, he lazily watched a movie, but in the end he didn't remember anything.

"The side effects of the mind hut are too great."

Felix poured himself another potion. For a while, he felt better and his head was not so painful. He directly took out the Ravenclaw crown from the ring and put it on his head.

A trace of cool air was constantly released, soothing his tired spirit.

"It actually works!"

Felix felt that his "reason" ran away from home, and finally came back after a walk outside.

He sat up from the sofa, carefully recalled what happened today, and couldn't help covering his face.

"Too rash..."

He quickly came to the workbench and cast layers of protective spells on the glass bottle containing the eight-eyed giant spider.

"Very good, now even the three-headed dog will take some time to break it." He said with satisfaction, "It's just right to record the duration of the magic, and then compare it with the data from Hagrid..."

But then, he suddenly realized a serious problem, "If I'm not better tomorrow, how can I teach the little wizard?"

Felix stared at himself in the mirror. He wore a crown shaped like an eagle with spread wings on his head. A sky sapphire was set on the eagle's chest, and its wings were decorated with rows of pearls.

Wearing a Ravenclaw crown to go to class will not only make people laugh to death, but also cause trouble.

After a while, Felix came up with an idea, but he was a little resistant to this idea...

When Hermione knocked on the door of the office on time, she saw Felix wearing a wide dark brown men's hat on his head.

"Professor's new look?" She couldn't help but take a few more glances.