Key gifted to Argus Filch

This key was a small key covered in gillyweed that were kept in Room 234-00 at Hogwarts Castle by Caretaker Argus Filch, until it was stolen by Patricia Rakepick sometime in the 1987–1988 school year.

History
Several years prior to the 1987–1988 school year, Argus Filch found a peculiar package in his office containing an old key covered in gillyweed and three black quills, which he stored in one of the shelves in his filing cabinet. When the Headmaster of Hogwarts called upon the expertise of a Curse-Breaker by the name of Patricia Rakepick to help the school at long last put the systematic openings of and tampering with the Cursed Vaults to rest, she came to suspect Mr. Filch possessed this key, having spent quite some time searching for it since she arrived at Hogwarts.

Unable to enter Mr. Filch's office without a good reason, Madam Rakepick lent her Niffler, Sickleworth, to Jacob's sibling for their search for a jeweled arrow head, which was a precious heirloom of the Forbidden Forest Centaur colony stolen by a student by the name of Jacob, who stole it because he guessed, correctly, that it was the key that would allow him to unlock the secrets of the Forest Vault and put an end to the curse plaguing the school.

Appearances

 * Harry Potter: Hogwarts Mystery