Nothing will ever surpass this as boss music. The beginning part is more sinister, more ominous than One Winged Angel, Serpent Eating the Horizon, Dancing Mad, Brahman, One Who Stands Against God, etc. The grand choir hyping things up while chinese man raps is a unique combination that has never been done in a boss bgm before and it worked.
youtube.com/watch?v=nlDqHp_kWoQ I'm a huge Katatoniafag and this gives me Last Fair Deal Gone Down vibes. A lot of vocal SH songs do, I just like this one the most.