Multiple choice general knowledge What do you have to say to make the Marauder's Map go blank? Marauder mirage Mischief done Mischief managed Mischief finished Reveal answer Fill a bubble to check yourself C Correct answer Explanation To deactivate the Marauder's Map and make it go blank, one must say 'Mischief managed.' This phrase was created by the Marauders (Moony, Wormtail, Padfoot, and Prongs) themselves.