I Solemnly Swear That I Am Up To No Good Enamel Pin

The oath has been taken. The intentions have been declared. Mischief managed - eventually.
For the fans who know exactly which map, which phrase, and which pair of troublemakers this refers to - and who have been waiting their entire lives for a pin that captures the energy of being simultaneously clever, chaotic, and completely committed to whatever questionable plan is currently in motion.
This pin is for the mischief makers, the rule benders, the people whose plans are always technically fine until they aren't, the book lovers, the fantasy fans, the ones who grew up reading about a certain school of witchcraft and wizardry and never quite recovered, and anyone whose default setting is "up to something."
Wear it on your jacket, bag, lanyard, or hat as a declaration of intent, a warning to the sensible, or just a very elegant way to let people know who they are dealing with before anything has even started. The perfect gift for the Harry Potter fan in your life, the person who identifies strongly with mischief as a lifestyle, or yourself - because you solemnly swear and the pin confirms it.