Callejon - "Phantomschmerz"

Never heard of them before and do not understand a single word they are saying, but I must admit to be digging on the song. They are a so-called "zombiecore" band, although I am not sure what that means. When I started the video I was expecting something like one of my friend's friend's band, Hard Rock Zombie, complete with blood and make up. Instead I got something different, it has zombies in it and music that is pretty cool. Take a look: