This piece is super cool because it’s got a secret message. It’s from Marauder’s Map, which only reveals itself when you tap it and say, “I solemnly swear that I am up to no good.” This person’s tattoo only fully reveals itself with a black-light. So, essentially at raves or hanging out in some teenage stoner’s basement.
This tattoo is simple and to-the-point. Everyone who hasn’t been living under a rock for the past almost 20 years (the 20th anniversary of the publish date of The Sorcerer’s Stone is in 2017) will know this reference.
This guy must be a diehard fan, and perhaps he’s really into the dark arts. But, if he wanted to be more accurate to the book, he should have tattooed Voldemort’s face on the back of his head so he’d be like Professor Quirrell from The Sorcerer’s Stone.