As a revolutionary leader who once almost overturned the entire wizarding world, Gellert Grindelwald naturally does not have too much strangeness to large-scale personnel deployment and strategic deployment at the macro level.

Even after half a century, when the old first Dark Lord and his no longer young followers reunited, the fit between the two sides was still as tacit as it was back then, and even more fluid and efficient than before.

After the baptism of time, these once naïve and reckless idealists have long since matured.

Although the number of people has shrunk by more than half compared to the past, almost every one of the Saints who have reunited around Grindelwald is capable of supporting a small, self-functioning stronghold on their own.

That's why Grindelwald is so comfortable spreading the work out to everyone.

Compared to his self-imprisoned in Newmondgard Castle, these old lads who had been incognito in the non-magical world for decades had already surpassed him in terms of how they treated people and how they bargained with Muggles.

But even so, by the time Gellert Grindelwald had completed all the assignments for the "Soviet Raiders" and returned to Hogwarts School of Witchcraft and Wizardry, it was almost twelve o'clock in the night.

Hogwarts Castle has long since fallen asleep.

Except for the lights on the headmaster's office on the top floor, the rest of the castle was already pitch black, and even the light in Hagrid's cabin on the edge of the Forbidden Forest in the distance had dimmed a few minutes earlier.

Syllable.

The fireplace in the principal's office was on fire, and there was a faint crackling sound.

Immediately after, a slightly tired old voice came out.

"Sorry, Albus, I came back a little late. ”

Dumbledore, who was hunching over the parchment in his hand, looked up and smiled heartily at Grindelwald, who was leaning over from the fireplace.

At this time, the original Dark Lord had reverted to his original form.

"Well, I got a text message from you. ”

Dumbledore pointed to a note on the table, looked at his tired old friend, and smiled quietly.

"Looks like everything is going well, I thought it might take another quarter of an hour for you to get out of there, and you're still ......."

"It's not my credit. ”

Grindelwald shook his head noncommittally, drew his wand and shook it nimbly around him, and replied nonchalantly as he removed the fireplace soot from his body.

"They're no longer in their twenties or thirties, I just need to tell them the goal, the main path to achieve it and the precautions, and as for the rest, they're better at dealing with it than I do. ”

"But ......"

Grindelwald unfastened his robe and hung it next to Phoenix Fawkes's bird stand, his eyes swept over Dumbledore's table, and finally landed on the row of light brown glass pill bottles on Dumbledore's right hand, and he frowned subconsciously.

"Why are you taking this medicine again, and have you been in trouble again while I'm away?"

"It's not a big deal, I remember you've been through it a few times. ”

Dumbledore removed his glasses from the bridge of his nose and rubbed his somewhat swollen brow, a helpless expression on his face.

Miss Kaslana and the other three girls blew up half of the history of magic classroom, and all the walls near the windows were blown off, and the house-elves were still collecting the scattered wreckage of the walls and trying to repair them a little. ”

Grindelwald: "......"

Hearing Dumbledore's words, the old man's mind first came to his bedroom with a large hole in Newmondgard Castle, and the beautiful scenery of the snow-capped mountains of Austria outside the cave......

Then there was the pile of broken planks that belonged to Elena's room under his former bedroom, and the door to the castle that had been blown off......

And also......

"Uh...... Elena's girl...... Haven't you been pretty good lately......"

The original Dark Lord tugged at the corners of his mouth and looked at Dumbledore with a confused expression.

"I remember just last night, weren't you still saying that Elena has been very obedient lately, and that the children's mutual learning program is going well?"

"No, it's all an illusion. ”

Dumbledore's face darkened and he waved his hand.

"I didn't notice it because they were making a small noise. If it weren't for the experimental accident that happened today, it might not be impossible for the castle to be blown up by these little guys one day. ”

"Blowing up to the sky? That's an exaggeration. ”

Grindelwald grinned, "With that little guy's strength, it's still unrealistic to blow up a magically protected castle, even if the magic power in her body is drained, at best, it will only collapse one or two towers at most." ”

"That's the case in the past, but not necessarily in the future, you come and see this. ”

Dumbledore shook his head with a wry smile and picked up a piece of parchment full of formulas and letters from the table and handed it to Grindelwald.

Although he did not fully understand the knowledge of [chemistry] for the time being, for Dumbledore, who had a certain knowledge base of alchemy, one night was enough time for him to understand most of the content a little.

Especially...... When he had a large amount of ready-made raw materials at hand, as well as the detailed experimental process that Luna had documented.

According to the girls' accounts, the process of this kind of "little chemistry experiment" is not very complicated in the first place.

After Elena and the others left the Headmaster's office, Dumbledore quickly found a safe and secure open place and began to try to replicate some of Elena's previous basic experiments.

Validating conjectures from phenomena and results, mastering principles and summarizing laws in the process of practice, this is the most normal experimental process and mind map, maybe Dumbledore does not understand the so-called chemical bonds and equations for the time being, but this does not affect him to follow the steps on the scratch paper and complete most of the operations according to the gourd.

And when a simple hybrid explosive is formed, whether it is detonated with an explosive charm or a regular flame, there is no obstacle for Dumbledore.

"What is this?"

Grindelwald glanced at the dense formulas and numbers on the parchment, pursed his lips, and looked up at Dumbledore and asked.

"That's what Elena is tinkering with and researching these days, and at the same time...... It was also a major factor in her blowing up the history of magic classroom today. She called this [Magic Chemistry]"

As he spoke, Dumbledore pointed to the parchment in Grindelwald's hand, his expression gradually becoming serious, and he said in a calm voice.

"Based on the experimental records provided by the children, I selectively tested five or six times. Although it can't achieve Elena's effect, it ...... It is enough to prove and deduce a lot of things. ”

"Times have changed, Gail, we may need to have a good talk, I need to hear from you. ”

(Mom!!)