Metal YouTuber Rob Scallion is really good at taking things you wouldn't think possible and making them work. Who knew metal would sound even remotely listenable when tracked through 100 year-old recording equipment? Or that blasting on an electric drum kit could actually make a beautiful piano track?
The dude is no stranger to innovation and as such has asked his fans to challenge him with weird ideas for him to run with. This fan asked him to write a metal song only using half steps, meaning the notes can only go up or down by one fret at a time for the entire track - and the madman has done it. Granted, it's not the most amazing song in the world but given the constraints involved it's actually quite impressive.
Have a listen for yourself!