Ryan was writing when a bottle of butterbeer was placed on the table in front of him. Looking up, Ryan saw Fred looking at him with a smile and George throwing toads into the crowd.

"You two are so weird, why are you still studying here while everyone is celebrating?" Fred asked.

"It's not because you two brothers and Harry are not only busy with my own business, but also for the three of you. You need a lot of time training for the competition, and since we promised to help you, we need to spend more time preparing and try to get you as much knowledge as possible in a short period of time. Don't forget that you have another race after this competition, don't you need to prepare?"

"I'm really sorry for you, thank you!" Fred said, scratching his head. "But you can try the butterbeer, it tastes really good and it's not alcoholic. ”

After getting the things almost ready for the table, Ryan and the others joined in the celebration. It wasn't until one o'clock in the morning that Professor McGonagall, dressed in a tartan dressing gown and wearing a hairnet, arrived and insisted that everyone go to bed, that the Gryffindor House party ended.

After everyone went to bed, Ryan sneaked out of the dormitory and into the common room, and then chose the corner behind the couch to start meditating.

Because he knew that Blake was likely to come to attack tonight, he planned to wait for Blake here.

After meditating for more than an hour, a slight grinding sound came from the entrance. Then a figure creeped in through the entrance.

The moonlight shone through the window of the common room on the man's face, and Ryan saw a thin body like a skeleton. He had a large mess of hair on his head and looked very dirty. The most important thing is to have a knife in your hand.

It seems that Sirius Black has been having a bad time lately, and after making sure that Black doesn't have a wand, Ryan uses the Purple Glow, and jumps out from behind the couch.

“...... Who is it?" Before you could say a word, you saw Blake rush up and raise his right hand, and then turned the knife in his hand upside down and tried to stun Ryan with the hilt.

It seems that at least Blake is not a bad person, and he will remember not to hurt innocent people by mistake at this time. Thinking that Ryan dodged Sirius's pounce, he then hit the acupuncture point on the back of his neck. Probably due to the long hours of travel and the exhaustion of his physical strength by hunger, Blake was unable to avoid the blow.

He threw himself directly on the ground, but fortunately there was a thick carpet on the ground that absorbed the sound of him falling to the ground. After the muffled sound of a heavy object falling to the ground, the common room was still silent.

Ryan pulled out an enchanted rope and tied it to Black, then read to him with his wand, "Revive quickly." It was clear that the spell had woken Blake up, but he still pretended to be unconscious and tried to fight back.

"Mr. Black, you don't need to pretend to be unconscious. As a friend of Harry's, I have to ask you one thing. Can you tell me why you want to kill Harry?"

"No, I didn't. Sirius's eyes widened sharply, and the veins in his hands burst out. "I'm here to kill that bastard, that bastard is still alive! I'm going to kill him!

Sirius was incoherent with excitement, but he didn't want to wake the others up, so he kept his voice as low as he could, even if he was screaming.

After a moment of excitement, Sirius calmed down and looked at Ryan, "You should be Ryan Liang, right? Can you tell me why you think I might not be a murderer?" ”

"Wait, how do you know who I am?" Ryan remembers that he didn't introduce himself at all.

"I've picked up a lot of scrap newspapers in Hogsmeade, and they have pictures of you receiving the Order of Merlin, 2nd degree. Seriously, this Asian face of yours is so recognizable, the whole Gryfin is just an Asian boy. ”

"Then why do you think I don't think you're a murderer?"

"Because you showed mercy to your subordinates just now, and you didn't go out to call anyone. ”

Sure enough, he was still inexperienced, and Ryan simply half-truthed and half-pretended: "Since you have read me in the newspaper, you should know that I am a hemp wizard." I sometimes look through a lot of material about the wizarding world to learn about it, and your case is in the old newspapers I've read. From the point of view of my Muggle world, there are too many doubts about cases like yours that have been sentenced without trial. ”

"Besides, I learned from Hagrid that you gave Harry to Hagrid after his parents were killed, and if you really wanted to kill Harry, you could have done it then. So my first instinct when I found you coming in was to ask what the hell you were here for?" Ryan told Sirius the reason he had come up with.

"You're courageous, worthy of a Gryffindor. Sirius glanced at Ryan and said, "Yes, I'm Harry's godfather, and I'm like a brother to his father, and I will never hurt him." I'm going to kill Peter Pettigrew, the real traitor. It was because of me that he had the opportunity to betray Voldemort about the Potters, and I came out to look for him because I saw him in the newspapers. Sirius said in a hoarse voice.

"Of course, I was lucky, and when I got to the door today, I found a note outside the door with a whole week's passcode on it. That's why I was able to come in. ”

"Is Neville cursed? Something that even Crookshank would have thrown from him. Ryan thought, "I guess there was some confusion when we walked in the door during today's celebration, and Neville threw his note away." ”

Ryan was thinking about these things when he saw Sirius staring at him all the time. So he opened his mouth and said the news that shocked him: "The Spotted you are talking about, is it now a mouse with a finger missing from its front paw?"

"You, how do you know?" Sirius looked at Ryan in surprise.

"You said you could see him in the newspapers, but theoretically he should be dead and can't be in the papers. The only explanation is that he didn't look like a human when he appeared, so the only thing that could hide in the Gryffindor Tower was a pet disguised as someone. Owls go to the owl room at school, and the only suspicious pet left is Ron's pet Spotted that I asked me to take care of. Ordinary house mice, which have always lived several times the lifespan of normal mice, have inexplicably started to be in poor condition this year. "It's easy to reason about the reverse of the outcome, but Sirius, who doesn't know this, is obviously shocked.

"Clever lad, I might even wonder if you should go for a Ravenclaw. You just said Peter Pettigrew is with you, hurry up and get him out and let me kill him. Sirius said excitedly.