"I'm almost sick of reading the story of the Three Brothers!" Ian had no choice but to temporarily give up his research and go to class after reading over ten different versions of the Three Brothers story.
The afternoon classes were fairly uneventful, except for Professor McGonagall hurriedly leaving the classroom after the class ended; everything else was just as ordinary as usual.
After dinner.
Ian first went to the Room of Requirement to adjust the magic potion he was brewing, and then put on that dreadful set of clothes again to complete the task Snape assigned to him to make things difficult.
The little wizards had almost all returned to the common room to rest, so there wouldn't be any awkward situations of accidentally bumping into someone. Notably, in the abandoned girls' restroom on the second floor, Ian didn't get a chance to explain to Myrtle, the ghost, who immediately dove into the toilet in terror upon seeing him enter.
"I'm not who you think I am!"
Ian knew that Myrtle had heard him speak snake-man and therefore developed some stereotypical misconceptions about him, but before he could speak, Myrtle had already slipped down the toilet, disappearing to who knows where.
"Could I count this as taking the blame for Tom? If I round it up, he framed me, and in that case, he should become the fuel for my practice."
Ian concluded his "detention" punishment with more than half a bucket of wax oil left, always being frugal with its use so that he could pocket the leftover materials through the "convenience of duty."
The extracted substances from this thing are quite valuable; only a wealthy person like Snape would be wasteful enough to mix it into the wax oil just to prevent Ian from slacking off.
"When will I become this generous? Ah, if the bricks in the Underground Palace were really gold, I could fulfill my wish of bathing in the Blessing Potion." Ian returned to the door of the Room of Requirement on the eighth floor; his current situation only allowed him to enjoy a free hot spring bath.
"Hmm?"
Ian tried to open the Room of Requirement skillfully, only to find it didn't appear. After trying twice more, he realized the room was occupied.
"Who could it be?"
Ian had only shared this place with Aurora; could Aurora be inside secretly brewing Truth Serum? Just as he was slightly puzzled and wanted to ask the Silly Barnabas who was beaten by the giant.
"Splash~!"
The door appeared.
Inside, there was also the sound of a toilet flushing. The next moment, just as Ian was astonished at someone using the Room of Requirement as a toilet, the door was opened by the person inside.
"Huh?"
Seeing the person coming out of the Room of Requirement, Ian's expression was a bit unexpected; he had thought it would be Aurora or Dumbledore using the toilet inside.
"Did I occupy your room? It seems it can't accommodate two people at the same time." Grindelwald, who came out, was applying something like hand cream on his hands.
"Did you use the Room of Requirement as a toilet?" Ian looked at the Professor of Defense Against the Dark Arts in front of him, a bit astonished that someone who had only come to be a professor this semester could find the Room of Requirement.
"Child, you have to understand the needs of a senior citizen." Grindelwald replied humorously, glancing back at the gradually disappearing wall with some amazement.
"This school indeed has more depth than I imagined." Clearly, the Durmstrang Institute attended by Grindelwald didn't have a place like the Room of Requirement.
"It's impressive that you found it." Ian sincerely marveled, knowing even the house heads at Hogwarts rarely knew about this secret Hufflepuff room.
"Maybe it's just that I need to go often; I can't hold it well, but I don't think I'm too old to have bad eyesight. I saw you come in and out often."
Grindelwald's reply left Ian puzzled. He quickly ran to the railing and looked down, but the office of the Professor of Defense Against the Dark Arts was not in a place where it could see this.
"I have a crystal ball."
Grindelwald approached Ian to clarify.
"..."
Ian looked speechless at the old man beside him, who bore Lockhart's appearance. He had thought Grindelwald was a secretive figure at Hogwarts, but hadn't expected him to openly admit to invading someone's privacy.
"I shall call you Witch Shadow." Ian remembered a similar peeping habit from a character named Fire Shadow in a previously read 'Bloodline Legend.'
"Aurora said you always say things that are hard to understand. Tsk, so true." Grindelwald shook his hands, ready to head towards the staircase.
"Wait a minute, Professor."
Ian weighed his options and decided to stop Grindelwald.
"Are you thinking of asking about the Prophet Daily? Rest assured, it will resume publication soon. I just had someone train them a bit, so they know what level of professionalism they should have." Grindelwald paused, raising an eyebrow with a carefree tone.
"Could they publish my work?" Ian stopped Grindelwald not for this reason, but since Grindelwald gave him the chance, he pulled out an article of his own.
[On the Importance of Health Potion]
This was a magnificent work Ian wrote using his excellent commercial foresight during his spare time, a prepared promotional material for his future plan to open a shop in Diagon Alley.