New Professor at Hogwarts

"There aren't many people. Anyway, you should pay attention to yourself."

Xia Ran asked: "Did you change your Animagus form, or did you use an invisibility spell, such as the Disguise Charm?"

Sirius' Animagus form is a big black dog. No one in the wizarding world knows this except Xia Ran, Lupine and Peter Pettigrew.

"Lupine is also at Hogwarts. It's better to use the Disillusionment Curse to be safer." Xia Ran said.

"I would like to use Animagus form to see Harry with my own eyes, so that he can see me." Sirius turned his head and said, "I also want to play with him for a while."

Xia Ran shook his head and said: "It's too unsafe. What if Lupine sees it? But Scabbers, the mouse that Peter Pettigrew transformed into, has been staying in the Gryffindor common room and is unlikely to be seen. you."

"Okay." Sirius had no choice but to agree to use the Disillusionment Charm, took out the old wand from Xia Ran's Room of Requirement from his pocket, and pointed it at himself.

The Disillusionment Curse is not a pure invisibility spell. The principle of this spell is somewhat similar to that of a chameleon, which allows the cursed wizard to be close to the surrounding environment so that others cannot detect it.

Xia Ran glanced over and couldn't find Sirius, because he had become exactly the same color and texture as in the office. She could only hear a voice coming from there: "Xia Ran, I'm going out first."

"Be careful." Xia Ran finally warned.

Sirius seemed to wave his hand, opened the door and walked out. Fortunately, there was no one in the corridor outside at this time, otherwise he would have screamed in surprise when he saw the door open automatically.

Xia Ran was not too worried. After all, Sirius was an excellent wizard with a level 5 magic power. Compared with Xia Ran at this time, he was not weaker at all. He had also experienced the first wizard war. He is brave and fearless, and believes that nothing will go wrong, as long as he is careful and cautious.

"It's better to read a book for comfort." Xia Ran changed the book this time, no longer reading "Poisonous Magic", but "Advanced Black Magic Revealed". This book tells a lot of black magic, the most evil black magic. One of the Horcruxes, there is also a related description in the book "Advanced Black Magic Revealed".

If Xia Ran remembers correctly, Voldemort discovered the dark magic of Horcrux from the book "Advanced Dark Magic Revealed", so Dumbledore later took away the book and no longer placed it openly in Hogwarts. library, so as not to mislead or seduce subsequent little wizards.

Not long after, Xia Ran's office door closed with a bang.

Xia Ran instantly touched her wand and pointed forward.

"It's me, Xia Ran." Sirius touched his own phantom spell, wiped the sweat from his forehead, and panted, "Unlucky, so unlucky."

Xia Ran changed her color and said, "Have you been discovered?"

"No." Sirius shook his head and said with a wry smile, "It wasn't discovered by someone, but by a cat."

The words just fell——

Meow! Meow!

There was a meow outside the door.

Xia Ran was stunned.

Sirius spread his hands and said with a helpless smile: "As you heard."

Creak!

He opened the door, and a big ginger cat slipped in. The cat's ginger fur was fluffy and soft, but its feet were obviously a bit boxy, and the expression on its face seemed to be a little enthusiastic. Although this cat Cats tend to have gloomy expressions.

"Crookshanks?" Xia Ran was slightly surprised.

The big ginger cat circled around Sirius, and when he heard someone calling his name, he turned to look at Xia Ran.

"Is it called Crookshanks?" Sirius closed the door and teased Crookshanks.

"It's Hermione's cat. It's more...well, more supernatural." Xia Ran said. Crookshanks easily discovered the anomalies of the mouse Scabbers and the big black dog in the original time and space, and also noticed the big changes in Sirius. The black dog became a good friend, helped him do many things, and even targeted the mouse Spot.

Unexpectedly, Crookshanks still bumped into Sirius this time.

"You're right, Xia Ran, this cat is indeed very spiritual." Sirius stroked Crookshanks, and the big ginger cat closed its eyes with satisfaction, "I cast a disillusionment spell on myself. It was discovered by Crookshanks, and it must have smelled it. It meowed around me, and I had no choice but to go back to your office first, but it also ran over."

"Perhaps, we can use the power of Crookshanks..."

Sirius mused.

"You mean to ask Crookshanks to help catch Spot the mouse?" Xia Ran asked with a frown.

"Yes, since Crookshanks is Hermione's cat, Crookshanks must stay in the Gryffindor common room most of the time, just in time to catch little Peter." Sirius became more and more excited as he talked. , "Little Peter turned into a mouse. He can't stop Crookshanks. If the Animagus deformation is removed, little Peter will be in trouble."

Xia Ranxin said that you used this strategy in the original time and space, with the help of Crookshanks' power.

"It's not impossible to give it a try." Xia Ran pondered, "Mouse Scabbers always stays in the Gryffindor lounge. As a teacher and not the dean of Gryffindor, I have almost no chance to enter the Gryffindor lounge. He went into the Lanffindor lounge. If he had given instructions to the young wizard, it would have been very easy to leak the secret and arouse the suspicion of others, including the vigilance of Peter Pettigrew."

"Mouse Scabbers is such a small mouse. If he runs into the sewer, he really won't be able to find Peter Pettigrew." Xia Ran said with a slightly worried look.

It was because of this concern that he never caught Mouse Scabbers, and had no better chance to make Mouse Scabbers' true identity public, to clear away the grievances on Sirius, and to get rid of the big blame on his back.

"I know that little Peter escaped from the sewer more than ten years ago, but cats and mice are natural, right? No one will doubt this, and little Peter himself will not doubt Crookshanks. Who is called He is a mouse, and Crookshanks is a cat." Sirius was still very interested.

"Okay, you can give it a try, but it mainly relies on Crookshanks' power to catch the mouse Scabbers. Sirius, you must not be exposed." Xia Ran said.

Sirius was teasing Crookshanks. At this time, he was in human form. His body shook twice, and suddenly a big living person turned into a big black dog.

When Crookshanks saw this scene, not only was he not afraid of his fur, but he barked at the big black dog curiously and swung his tail back and forth.

"Woof woof woof!"

"Meow meow!"

Xia Ran held her forehead and saw a big ginger cat and a big black dog communicating in her office. Why did this scene look so weird?