I just did a quick search and it seems there is only about four songs with Nosferatu and any other word in it and the only other one not used is by some rock band. So unless there is some shitty obscure black metal band that doesn't rate well on google I might have broken the game
There is a few named Nosferatu (Robbie Williams, some rap guy, Bloodbound, Blue Oyster Cult) but the only other one I could find with other words was Nosferatu Man by a band I think was listed as Sling.
Some American rock band apparently.
Actually it was slint https://en.wikipedia.org/wiki/Slint and they have nothing to do with metal but they did make a song that would unbreak the game.