The iPhone X’s face-tracking capabilities range from supremely cute to oh, that might be useful. Now comes something truly terrifying. A Japanese app developer named Kazuya Noshiro has tweeted a preview of an app he’s working on that camouflages a user’s face with the background (first spotted by Design Taxi). The brief, ten-second video shows Noshiro moving his transparent face around to reveal the contents of his home through his head.

The effect is like a creepy, see-through beauty mask — similar to Harry Potter’s invisibility cloak. According to Noshiro’s tweets, the app was made on game development platform Unity, and uses a fixed camera position to shoot a background in order to create the illusion. There’s no word yet on when the app will be released or what exactly it will be used for. But chances are good that it’ll serve the same purpose as every other consumer-focused AR effort so far: novelty.