"You mean, someone was spying on me just now?" Jon, who had already taken off the Iron Ring, glanced at the Stone Monster in some surprise.

Naturally, he wasn't inserted into the vanishing locker upside down by the Weasley brothers, he just used an "Oblivion Charm" on them to modify their memories slightly.

As for this time, he has been in the principal's office...... This is undoubtedly the safest place in all of Hogwarts, as with Dumbledore's departure, Stonecubes will not let anyone but themselves in.

In the dead of night, though, Jon would walk to the door of the headmaster's office, reading a book and occasionally chatting with the stone monsters.

Because the Headmaster's office was so noisy, the chirping portraits of the Headmaster, since Dumbledore left, wouldn't stop talking about strange things all day...... In such a noisy environment, it is really impossible to read a book in it.

Although the stone monster is simple, it is much quieter than those dozens of principals.

So when the stone monster told Jon that he was being "watched", he was immediately confused.

"That's right. The stone monster nodded, "But that magic shouldn't just be for you, it could be for the entire school of detection magic or items...... I've hidden both of your names within the confines of the Headmaster's office, and now no magic can detect you. ”

"How do you have that ability?" Jon stood up, put down the book in his hand, and glanced curiously at the ugly stone monster.

"Of course!" the stone monster raised his head haughtily, "As the guardian of the headmaster's office, I have been through three principals in a row, and I have a history of more than a hundred years...... If any magic can invade the principal's office, what's the use of me?"

“...... Are you over a hundred years old?" Jon couldn't help but wink, "That is, any ghosts, statues, or portraits pulled out of the castle are above your grandfather's generation?"

The stone monster suddenly faded like a punctured ball, and it glanced at Jon with some apprehension.

Looking at its pitiful expression, Jon could only comfort, "Actually, you can think about it from a different perspective...... The other statues in the castle, although they are older than you, are not as powerful as you...... You have such abilities at such a young age, and your future is limitless!"

The stone monster burst into laughter and wagged its tail happily at Jon, nodding his head from time to time.

......

A reminder from the stone monster leads Jon to connect with Harry Potter's "Living Point Map".

Probably this type of magic item, I hope no one notices me...... However, Jon Hart has theoretically been dead for more than half a year, so even if he is noticed, he will probably be mistaken as a delusion.

Now that the entire headmaster's office is hidden by stone monsters, then he will be safe. However, to be on the safe side, even at night, you can't leave the principal's office to prevent accidents.

The stone monster next to him had already lay down and began to snore.

Jon also stood up and returned to the Headmaster's office.

After twelve o'clock in the evening, it became very quiet.

There was a roast chicken and a plate of sandwiches on the table, and Jon gently pulled out the drumsticks and began to nibble on them.

Naturally, there was no food other than candy in the headmaster's office, and Jon didn't dare to ask the house-elves to bring food (Umbridge, as the "headmaster", could order the house-elves).

However, he was not completely out of the question, and he spent more than ten minutes "coercing" Principal Phineas Black to successfully get him to go to Grimmauld Place and deliver a message.

Dumbledore and Fawkes had been there most of the time, so since the message had been sent, Fawkes had flown in every few days with a bunch of food.

The stupid phoenix seemed to be quite happy with this kind of "messenger" work, because every time she returned to the headmaster's office, she could fill her stomach with herbs and go back......

......

Jon was nibbling on a chicken leg when he suddenly heard the sound of saliva coming from behind him.

Looking back, it was Principal Dexter Fusco, who was secretly looking at himself...... After seeing Jon turn around, the chubby wizard with the red nose quickly closed his eyes and pretended to be sleeping.

"Headmaster Fosco?" Jon tiptoed over and whispered to avoid disturbing the others.

Headmaster Dexter Fosco had to open his eyes, and when he saw the chicken leg waving in Jon's hand, he had to look away and cough lightly:

"Ahem...... It's true that the last time I ate was almost three hundred years ago. ”

When he saw Jon's expression that wanted to laugh, he was annoyed and said, "You will have this day too, after you become a portrait!"

He spoke so fast that Jon didn't hear him.

And Jon was apologizing to him apologetically, "I'm sorry, Headmaster Fosco, I didn't mean to; I'll take it out when I eat later, and go to the stone monster at the door......"

Principal Fosco's face softened considerably.

He looked down and saw the pages of the Tip of the Spell Summary in Jon's hand.

"Are you learning the Transfiguration Charm?" he asked.

"yes. Jon nodded, and said honestly, "The most I can do now is to make the enchanted object look like a chameleon, with the color and texture consistent with the environment behind and around you...... The slightest movement will reveal the filling, and it will not be able to achieve complete invisibility. ”

"There's a little bit of a problem with your overall thinking!" Dexter Fosco said unceremoniously: "It's the stupidest thing to do to keep the colors and textures in line with the environment behind you and around you, because your surroundings are different...... The right thing to do is to act on your own ......"

"That's right, you should notice the effect of light, that's all that matters!" a voice suddenly came from above, it was Chris Evra, who had never been very talkative, and he said with a serious expression.

"Actually, I think it's better to use the invisibility cloak...... Phineas Black said weakly, "The invisibility beast is actually quite common in Africa...... You walk around the East African savannah and you can definitely find one in two years. ”

Jon noticed that almost all of the headmaster's portraits had their eyes open.

"Did I wake you up?" he asked quickly.

"Of course not. Phineas Black shook his head: "How can we possibly need to sleep?"

"That'...... Then why do you show a sleepy look every day?" Jon asked, stunned.

"Pretend......" Phineas Black said as a matter of course, "how boring it is to keep your eyes open all the time every day!"

Jon turned his gaze to the other headmasters, and they all nodded, including the usual stern-looking Oliver Cromwell.

Jon stood there dumbfounded, the chicken leg in his hand falling to the ground involuntarily.

"Let's move on to the Transfiguration Charm. Dexter Fosco ignored them: "Where did we just go...... By the way, the top-level transfiguration spell should be applied to the light......"