Hermione's guess startled hermione, and she was so surprised that she couldn't help but ask. "You're saying that Professor Moody imprisoned another person at the castle before he needed to prepare extra food for him?"

"With that possibility, I'd rather like that person is hiding in his office." Ivan nodded.

"That's why he didn't allow the elf to clean his room......" Hermione muttered to herself, she already figured out why Ivan had asked those questions in the first place.

"But why would Professor Moody do this? I've heard that he used to be a powerful Auror, and he captured a lot of dark wizards and Death Eaters, so he couldn't have worked for the Mystery! Hermione was confused.

If it weren't for Ivan's suspicions about Moody, she couldn't have imagined that Professor Moody might be a bad guy.

"I don't know... I'm just guessing! Ivan shook his head, he couldn't be sure if it was true, there were too many doubts.

Moreover, Moody himself is a very suspicious person, and it is normal for house-elves not to be allowed into the room, which is why he has noticed something unusual before but has not suspected it.

"Could it be that someone disguised himself as Professor Moody with Polyjuice Potion and hid the real Professor Moody?"

Hermione immediately thought of the possibility, as only then would "Professor Moody" have to feed the other man so that he would not starve to death.

"Probably not... The expiration of the compound decoction is limited, unless he can replenish it at any time, otherwise it will definitely be exposed! Ivan shook his head, he had already checked this, Moody was not in the habit of carrying a wine gourd with him, nor did he drink a certain drink from time to time during the lesson.

"I'm more suspicious of the Imperius Curse than ever!" Ivan said hesitantly.

Hermione's eyes widened, of course she understood what the Imperius Curse was, Moody had just explained the effects of this magic in her Defence Against the Dark Arts class this year, and the ability to control a wizard without knowing it was listed as one of the three unforgivable spells!

"Moody is a very cautious Auror, his willpower is not weak, it is impossible for ordinary people to control him for such a long time, I guess it should be the hand of the mysterious man himself. And in order to prevent Moody from breaking free on his own, someone must be on hand to monitor him at all times and reinforce the effects of the Imperius Curse at regular intervals......" Ivan said eloquently.

Ivan had practiced such a practical dark magic as the Imperius Charm, and he knew very well that it would be broken free by the strong-willed.

As for the solution to the disadvantages, it is not impossible, just like he controlled Nott, sending someone to supervise and regularly consolidate the Imperius Curse can greatly prevent the other party from getting out of his control.

Of course, this approach is not perfect.

Because casting the Imperius Curse on the same person in a short period of time can easily make the opponent resist and greatly reduce the power of the spell, so you need to cast the spell on them more often until you fall into an endless loop.

Hermione didn't know as much about the Imperius Curse as she knew about it, but she could understand the seriousness of the matter, so after Ivan finished her guess, she hurriedly pulled him and ran upstairs. "Since Professor Moody is under control, let's hurry up and save him!"

"Wait, Hermione!" Ivan reluctantly stopped Hermione's movements, and then spoke again under the little witch's puzzled gaze.

"I'm just so skeptical, there's not enough evidence to prove it! What if Professor Moody is really a big eater and happens to like to eat supper at night while working overtime? It's not impossible. ”

Hermione was dumbfounded, she looked at Ivan in a daze, and after a long while, she pursed her lips in distress and spoke. "That's... So what should we do? ”

"Of course, I'm going to go back and think about it, and see if I can find more clues in the next few days......" Ivan said hesitantly, but this time before he could finish speaking, Hermione directly interrupted.

"Don't lie to me, you must be planning to go to Professor Moody alone later!"

The little witch bit her lip and glared at Ivan very angrily, how could she not guess that Ivan was planning to fool herself, and then go on an adventure alone, and for a while she wanted to reprimand her.

But thinking that she might not be able to help if she followed, Hermione swallowed the words again, and felt a pang of bitterness in her heart, and finally had to whisper aggrievedly.

"It's too dangerous, you should at least tell Professor Dumbledore about it! What if this is actually a trap and someone deliberately shows a flaw to lure you into it? ”

Ivan looked at the little witch in front of him, sighed for a long time, and said in compromise. "Well, you're right this time!"

Due to the inconvenience of revealing a lot of information, Ivan has become accustomed to solving all things alone over the years, and has occasionally been tricked a few times, but Hermione reminded him this time that there is really no need to risk some things alone.

……

Half an hour later,

In the Headmaster's room at the top of the tower, Ivan briefly outlined his guess, while Dumbledore paced the wide office with a furrowed brow.

"Hals, can you be sure that Alastor has been controlled with the Imperius Curse?" Dumbledore asked.

Ivan shook his head, all of what he said was a guess, and he couldn't be 100% sure.

"Professor Dumbledore, isn't there any way to detect this dark magic?" Hermione said confusedly.

"Unfortunately, Miss Granger, as far as I know, the Imperius Curse doesn't have a specific counterspell, otherwise it wouldn't have been classified as an unforgivable spell." Dumbledore replied.

Ivan nodded, the Imperius Curse is a very tricky magic, and it has caused a lot of trouble to the Ministry of Magic, and Death Eaters like Lucius use it to get away with it, relying on the fact that the Imperius Curse is difficult to prove.

Only those who are clever masters of the Divine Mind can find some clues by browsing the form of memory.

However, Moody's vigilance was too high, and if anyone used a Dementor on him, he would definitely be noticed.

Ivan thought back to the previous encounters, and found that Moody almost always used the magic eye to look at him, and it was obvious that the other party was consciously guarding against this.

Dumbledore groaned for a long time, Alastor was one of his most trusted friends,

For most of the past half of the school, the other party has never shown anything wrong, everything is so familiar, so he has never suspected this old friend, and even entrusted the other party with the task of investigating the Goblet of Fire......