Here's a fun question, what would you consider to be a theme song of your world?

Title's pretty self-explanatory is there any song you would pick as a good showcase of what your world is about, something you might put into a trailer, and furthermore why would that song be a good fit for your world?

Personally for my setting I would pick Tohuvabohu by KMFDM (https://youtu.be/9fPeooNyBCA). My setting is a grimdark fantasy world where the last bastions of humanity, the only species gifted with a conscience, are surrounded and assailed by totalitarian cultish empires by land, monstrous specimens of chaos by sea, the hungry and ruthless machines who hail from the night sky, the innumerable hordes of necromantic shrooms, along with curses and so-called punishments sought out by the most wicked and sinful beings to further empower themselves. I found Tohuvabohu to fit as it meshes well with the grittiness, darkness, and the theme of defiance of both, the willingness to stand up to the numberless dark and endure. Hell, I can imagine a knight singing the song to himself as he continues the fight.