Harry Potter scroll...in black light ink it says "I solemnly swear I'm up to no good." Way too cool Solemnly Swear, Blacklight Tattoo, Maps Tattoo, Marauder Maps, Literary Tattoo, Black Lights, Map Tattoos, Harry Potter Tattoos, White Ink
Harry Potter Marauders Stacking Mug Set. This would be a great gift, but I don't think I could part with them...
18 Stunning Black-Light-Responsive Tattoos | Mental Floss Awesome! That's what I'm doing. Black light ink for my dark mark. Hell yeah.