20 Easter Eggs In Harry Potter Films You Didn’t Notice

By Sam Heard /

2. The Marauder€™s Map Reveals All

Warner Bros. (via Tumblr)Film: Harry Potter And The Prisoner of Azkaban

The Marauder€™s Map is irrefutably one of the coolest magical items in the wizarding world. It has the power of revealing the location of anyone in Hogwarts €“ regardless of whether they are under the effects of polyjuice potion, invisibility cloaks or animagi €“ and reveals wizard and witches not just in every classroom, hallway and corridor but also across all of the grounds, secret passages and hidden rooms. Anyone who knows just how sprawling Hogwarts is will appreciate this handy piece of hardware.

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In order to activate the map€™s enchantment, the owner must recite the phrase "I solemnly swear that I am up to no good€. The eagle-eyed viewer will see that two others shown on the map are also up to no good, having their mischief managed in some shadowy corner of Hogwarts by somebody else. And we didn€™t think the students got frisky until The Half-Blood Prince!