The matter was settled, and Dumbledore asked Professor McGonagall to arrange Lupin's Hogwarts residence first, while Zhang Ziyu stayed in the Headmaster's office.

"I thought you would rush to find Voldemort's Horcruxes, but I didn't expect you to sit still like this." Dumbledore sighed and said, "Tom's main soul is on Quirrell, how dare I leave, and even if I know what a Horcrux is, it will take time to investigate, let alone Harry." "The other Horcruxes are easy to deal with, only by probing and searching, they can be destroyed by all means.

Harry alone and Dumbledore were helpless. The only way to destroy this remnant was to sacrifice Harry, and that was exactly what Dumbledore didn't want to see.

He still has time Voldemort has not been completely resurrected, and he wants to find a way to keep Harry alive and defeat Voldemort.

Zhang Ziyu suddenly said, "How about handing over the Horcrux to me?" "Since the word 1/7 appeared after containing Voldemort's remnant soul, there is no reason for Zhang Ziyu not to do a wave of collection and see what will drop from the complete Voldemort soul.

Dumbledore looked at Zhang Ziyu for a moment, and Zhang Ziyu explained: "For some reason, I want to study Lao Fu's soul, I should be able to get out the remnant soul on Harry's body, my master is professional in dealing with soul bodies." Dumbledore didn't expect Zhang Ziyu to have a way, he didn't hesitate, and immediately nodded and said, "Yes, I'll help you find the Horcrux, and you can help me rescue Harry, but Tom must not let him come back to life." "If it were someone else, Dumbledore would have wondered if the person on the other side had set his sights on the Horcrux and wanted to gain immortality like the Dark Lord.

But Zhang Ziyu is inevitably impossible, from being able to connect different worlds, Dumbledore knows that Zhang Ziyu's vision will not be limited to such dark magic with great side effects.

Therefore, he promised very simply, Zhang Ziyu can solve the hidden danger of Harry, which is a good thing.

"I'll find a time for Harry to come and show you, take your time, don't rush, Tom is not in a very good state right now, and the resurrection is not so easy." Knowing that Voldemort was on Quirrell, Dumbledore activated almost all the portraits, staring at Quirrell's movements almost all the time.

If it weren't for the fact that it was too strange to hang a portrait in the toilet, it is estimated that Dumbledore would have put a portrait on these dead corners of the toilet for the first time.

Of course, this is also Lao Deng did not keep up with the pace of the times, and it is really normal to hang portraits and posters in public toilets.

What is angry, coming and going, one small step forward, one big leap for humanity....... The slogans are not too classic, just with a portrait, isn't this monitoring there?

But it doesn't matter if there is no toilet, after all, it is unknown whether Quirrell after Voldemort leans over will dare to with his master.

Anyway, Quirrell stared at the portrait every day, and Dumbledore knew that Voldemort's main soul was in extremely poor condition, and his strength was almost unmaintainable, except for immortality, everything else was a crumb.

"By the way, I said hello to Hagrid over there in the Forbidden Forest, you just go in directly, Hagrid won't stop you." Dumbledore was also very simple, and since the deal was made, he would naturally arrange everything.

He also knew that Zhang Ziyu should be going for magical creatures, and then there were some potion raw material plants, so it was not a big problem.

Anyway, the Forbidden Forest is not Hogwarts property, and even with the development of Hogwarts, it will have some products of the Forbidden Forest, but it still cannot change the ownership.

This deal was a convenient deal, Zhang Ziyu and Dumbledore were very happy, and the only sad person might be Hagrid.

Because Hagrid has always regarded all kinds of dangerous magical creatures as pets and friends, even if they are wild.

Zhang Ziyu also received this sentiment and said: "I will pay attention when I collect, and try not to make Hagrid sad." ”

"Then there's the library, Mrs. Pince, as I said, you and the headmaster have the same borrowing privileges, and the entire library is open to you." Zhang Ziyu nodded and said, "It just so happens that I'm looking for information about werewolves." ”

"And this one, which is also part of the collection." With a slight wave of his hand, Dumbledel's levitation charm was cast, and dozens of old books floated out of the shelves, followed by a slight change in his gesture and a copy charm, which instantly turned into identical duplicates.

Zhang Ziyu was a little curious and asked, "What are these books?" The old man Dumbledore smiled embarrassedly and said, "The collection of books of the past headmasters, the library is open after all, and some magic books that we think are dangerous or too advanced, we will selectively put them in the headmaster's office, and choose to keep or take them away when we retire." Zhang Ziyu rolled his eyes when he heard this, remembering Voldemort's former Slytherin dean Horace Slughorn, it is estimated that these professors did the same, and some of the books were kept by themselves and reserved for the talented students.

The one mentioned above is the one who told Voldemort the Horcrux method.

"Okay, I've taken these books, I'll inform my assistant teacher Lu Ping when I can go to class, and the professor will see you back." The transaction was sorted out, and Zhang Ziyu didn't stay, even if Lupin's salary was a clerk and a security guard, and he simply robbed and took classes for several jobs, which looked a little pitiful.

Coming out of Dumbledore, Zhang Ziyu was guided by the portrait to the room arranged by Professor McGonagall.

Not in the basement, but in a room near the Hufflepuff lounge, not far from the kitchen. The outside of the room doesn't look big, but the interior is not small, apparently the result of the illegal use of the Traceless Stretching Charm.

Of course, according to the history of Hogwarts, it may not be considered a violation at that time. Zhang Ziyu hadn't rested for long, and when it was time for the dinner, Dumbledore held a group dinner and introduced the new excellent alchemy professor to the teachers and students of the school.

At the dinner, Zhang Ziyu also met other professors and faculty members together. Professor McGonagall and Professor Flitwick are very recognizant of Zhang Ziyu's arrival, especially Flitwick, he thinks that Zhang Ziyu's alchemy creation provides more possibilities for wizards to fight, and he thinks that Zhang Ziyu has a high level of magic skills, and wants to discuss it together later.

Snape still had a cold face, but he also nodded to Zhang Ziyu. Snape was very interested in Zhang Ziyu's refining of elixir, and he also wanted to have a good discussion with this potions master, but at the dinner party, it was obviously not a good time for so many people.

After the dinner, Zhang Ziyu unusually ushered in a period of calm. The alchemy course is an elective course, so there needs to be an interval between registration and class arrangement, and students who sign up need to prepare which textbooks they need to prepare also need to be informed in advance.

There are a lot of things, all of which are trivial, but it is obvious that it is impossible for a fishing king like Zhang Ziyu to do it himself, so it is Lupin who handles things.

In just a few days, the students did not remember Zhang Ziyu, but remembered the kind and funny teaching assistant Mr. Lu Ping.

Among them, Harry Potter felt the most profound, he felt that Lupin was very affectionate, as if he were a relative.

Zhang Ziyu himself disappeared for several days, borrowed a lot of books, and buried himself in the monster ranch to study information about werewolves, and even Snape and Flitwick wanted to talk to him about potions and spells, but they couldn't find anyone.

In this way, the time gradually came to the node of the full moon, and the formal research began.