But Is It Useful? Nope

"Simply unacceptable!" Professor McGonagall looked sternly at Dumbledore. "We need to think of something. We can't leave the students in danger."

Dumbledore leaned back in his high-backed chair, rubbing the ring on his finger as he expressionlessly swept his gaze over the professors in the office.

"What are your thoughts?"

As the first victim, Editor-in-Chief Lockhart was the first to respond. "We must catch the murderer!"

Snape had his head lowered, seemingly lost in thought. Sirius frowned, as if he wanted to say something but held it back.

Dumbledore's gaze immediately settled on Sirius. "Professor Black, what do you think?"

"All right." Sirius let out a deep breath, as though he had made up his mind, then looked up at Dumbledore. "Back when we were students, we explored all the secret passages in the castle and made a map that could show people's whereabouts..."

"I know. The Marauder's Map." Dumbledore smiled faintly.

"!!!" Sirius's eyes widened. "You knew?"

"Here it is." A small hand suddenly reached out from behind him, holding a folded map.

Sirius stared blankly at the map, then turned around to find Anthony Weasley behind him.

"George and Fred are its current owners. When Professor Dumbledore gathered everyone just now, I went and borrowed it from them." Anton shrugged. "It never seems to have been useful when it mattered."

Seeing Sirius staring wide-eyed at him, Anton gave a chuckle. "Hmm, let me think. Whenever people have infiltrated the school, the Marauder's Map never seems to have done anything, ever since I started attending Hogwarts..."

Anton seriously counted on his fingers. "Voldemort snuck in as a professor. Later, his Horcrux, Tom Riddle, was brought into the school. Barty Crouch Jr. infiltrated the place with Polyjuice Potion and even became Harry Potter's roommate. A little girl from the Potter