The Marauder's Map

The Marauder's Map is a magical object from the Harry Potter series created by characters James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew during their time at Hogwarts School of Witchcraft and Wizardry. It is a detailed map of the school that shows all its rooms, secret passages, and movements of people in real-time, represented by tiny footsteps. The map can only be activated with the phrase “I solemnly swear that I am up to no good,” and it serves as both a tool for exploration and a clever means of evasion.