This is an officially licensed shirt. If you ever get your hands on the Mauraders Map make sure to chant these words " I solemnly swear that I am up to no good". Now you can track your nemesis like Draco Malfoy or check on the other houses like Ravenclaw, Hufflepuff, and Slytherin. Or if you happen to forget the words this tee will be by your side to remind you. This darl grey tee features a gold foil graphic of the saying " I Solemnly Swear That I Am Up To No Good". This soft 50% Cotton 50% Polyester t-shirt is super soft. Sure to be a favorite! Makes a great gift idea.