In "Harry Potter and the Prisoner of Azkaban," Sirius Black and Remus Lupin use a reversal spell to reveal that Ron’s pet rat, Scabbers, was actually the traitorous wizard Peter "Wormtail" Pettigrew. Unfortunately, the exact canonical name of the spell is unknown, and the game’s developers didn’t include it in "Hogwarts Legacy," but maybe it will be in the sequel.