MARAUDER'S MAP

The Marauder's Map is a magical document disguised as a blank piece of parchment, created by Hogwarts students Remus Lupin, Peter Pettigrew, Sirius Black, and James Potter. Activated by tapping it with a wand and reciting 'I solemnly swear that I am up to no good,' it reveals a detailed real-time layout of Hogwarts Castle and the exact movements of every person on the grounds. It serves as a vital tool for Harry Potter and his allies throughout his school years and the Wizarding War.