Mysterious Walker at Hogwarts

Snape obviously didn't want to talk too much about Grindelwald. After calling it a day, he took out an SL rally chess piece that Dean was very familiar with.

That's Castle Black.

"I thought about it for a long time and decided to tell you this." Snape said, stroking the chess piece.

"I also have one of the SL rally chess pieces." Dean said and took out his Black Bishop.

The surprise on Snape's face flashed, and then he showed an expression of relief: "I understand, I guess your chess piece was given to you by Delphi?"

"You really have a sharp eye." Dean complimented.

"Are you C8 or F8?" Snape asked.

"C8 White and Black Bishop, how about you?"

"A8 white square black castle." Snape replied looking into Dean's eyes.

"So you are the one who provided the formula for Aphantasia at that SL rally?" Dean couldn't help blurting out.

Snape's brows furrowed deeply: "How do you know? I remember that Bishop Bai Gehei was not present at that meeting."

"In that rally, I was the E2 White Guard." Dean explained quickly.

A flash of doubt flashed across Snape's face: "So you hadn't become Bishop White and Black at that time? I remember Bishop Black and Black said at that meeting that Bishop White and Black was also a potion master. Master, I thought it was you just now, but now it seems there is someone else."

"No, Godfather, Bishop Haighei is talking about me, but I was attending the rally with the E2 White Guards at that time." Dean said.

"This is impossible!" Snape shook his head repeatedly. "If you have participated in the SL rally as the Bishop of White and Black, then it is impossible for you to participate in the subsequent gatherings as the White Guard."

"Why?" Dean asked in surprise.

"This is the rule of the SL rally. After low-level chess pieces are promoted, they can use high-level chess pieces to participate in the rally, but high-level chess pieces cannot return to use low-level chess pieces to participate in the rally." Snape said.

"This rule is so weird!" Dean said he didn't understand.

"This is to prevent high-level chess pieces from hoarding low-level chess pieces and then using the low-level chess pieces to cause trouble at the assembly," Snape explained.

"It seems that this rule does not have any strong constraints - I did participate in the meeting as a White Guard, and I was not punished in any way." Dean said with confusion.

"Maybe you just didn't notice it." Snape smiled slightly.

"What kind of punishment will I receive?" Dean's expression changed.

"Do you still have your C8 black bishop chess piece?"

"Of course." Dean said and took out his Black Bishop chess piece from the dragon skin bag.

"Try to see if you can use this chess piece to call an SL rally." Snape prompted.

"You mean that after using the chess pieces of the White Guards, I have been deprived of the authority of the Black Bishop?" Dean knew that one of the rules of the SL assembly is that only chess pieces of the Guards and above can take the initiative to call the assembly.

"These are just the basic rules of SL gatherings. You will know after you try it." Snape's face was not so pretty.

"Then I'll give it a try." Dean said and activated the rally function on the Black Bishop chess piece. A familiar feeling of dizziness came and Dean found himself in the C8 position of the SL assembly hall.

……

"Dean? Dean?" In the mini alchemy laboratory, Snape found that Dean suddenly closed his eyes and became a little anxious. He did not expect that Dean could actually use the authority of the Black Bishop to call a meeting.

"Xiao, you really gave birth to a freak!" Snape couldn't help but smile bitterly when he saw that he couldn't wake up Dean.

The rules that apply to all members of the assembly are ineffective for Dean. Even with Snape's knowledge, he doesn't know what went wrong. He can only say that Dean is the special one.

At this time, Snape's A8 Black Castle piece began to signal that a meeting was being called, and he could choose to participate or not.

Snape shook his head and chose to participate.

Dean's convening of this rally was originally an attempt and had no purpose at all. It would be extremely detrimental to Dean if discovered by other rally members.

Moreover, under normal circumstances, at least one of the two kings and queens will participate in every SL gathering. Snape still has not figured out who the two kings and queens really are, and of course he will not rest assured that Dean will violate the rules under their noses. .

……

"Bishop Baigehei, what is the purpose of calling this meeting?" asked King Bai, who attended almost every meeting.

Dean was speechless and didn't know how to answer. He never expected that the rules of the meeting that Snape told him were invalid. Only then did he realize that there was no reason to call this meeting.

"Your Majesty King Bai, I asked Bishop Bai Gehei to help convene the assembly." Just when Dean was at a loss, Castle Baigehe appeared at the A8 position.

Dean knew that it was Snape who came to the rescue.

"Baige Black Castle, why don't you rush to gather yourself?" King Bai asked curiously.

"Everyone knows that no one has completed the request I made last time to convene a rally." Bai Gehei Castle explained, "If I call a rally to make a new request, according to the assembly rules, the old request will automatically be invalidated; so I asked Bai Gehei Castle to make a new request. He came to the Castle of Gehei to convene an assembly so that my new demands would be recognized as being made by him and my old demands would be preserved.”

White King smiled sarcastically: "Only you, Black, like to take advantage of the rules."

Bai Gehei Castle retorted: "This is called reasonable use of loopholes. Who is to say that the rules you made are imperfect!"

Dean was extremely surprised. He didn't expect Snape to be so brave and dare to challenge the White King directly.

Dean noticed that only he and Snape were attending the gathering on Black's side this time, and even the Black Queen, who had been sitting in charge of Black's side, did not appear.

Dean estimated that the titular "Dark Queen" was being influenced by the Holy Light Chain and was unwilling to attend this gathering - God knows if strange things like the Holy Light Chain would also be brought to the gathering?

If White knew that Black's queen was tied up with the Holy Light Chain, Black's face would be completely thrown to the ground and rubbed.

"You are so eloquent. You should know that the rules are jointly formulated by both black and white..." King Bai snorted coldly.

"I believe that the wisdom of the first-generation SL assembly members should be far greater than ours. How could they turn a blind eye to such an obvious loophole in the rules? So I think since both parties recognize this rule, the so-called loopholes were left deliberately." Bai Gehei Castle made amends with the previous offense in a few words.

"Interesting understanding, then tell me about your request for convening the meeting this time." King Bai didn't hold on to it for some unknown reason.

"I need a large amount of raw materials for preparing magic potions, and the price is arbitrarily high!" Baigehei Castle said proudly.

"This request is not difficult." King Bai said calmly, "Bishop Baigehei, are you willing to let Baigehei Castle waste this precious opportunity?"