Hogwarts Taboo Index

Silas Blackwood, 25 years old, was born in Ravenclaw at Hogwarts. After graduation, he worked as a Mute in the Department of Mysteries of the Ministry of Magic. He masters a lost ancient magic skill - "Listing Technique": he can "write" magical knowledge, character fates and even historical events into a physical directory, and the contents of the directory will be automatically updated as reality changes. His return to Hogwarts was not voluntary, but because a blank page suddenly appeared in his "Forbidden List" - it was supposed to record the fate of a key figure, but it was artificially erased. And the person who erased it is probably within Hogwarts.