Favorite boss music

What's your favorite boss music and why? Any reason goes! Mine: Maiden Astrea from Demon's Souls. It was not a "fun" boss fight, the second I walked through the fog and the music started I stopped in place. I knew something was off. I have never felt a sense of dread like that moment. https://youtu.be/K-rNVnrFQDg

Metal Gear Solid: Guns of the Patriots How they played every important song on the final boss with liquid. https://youtu.be/9aHQnDTd1y4 Especially how they played this song, it had a different … sad tone. Especially how brutal the beatings were.

Tales of Symphonia - Fatalize. Plays during 3 boss battles in the story, enemy names of Clumsy Assassin, Resolute Assassin and Convict(blue-haired one) and while fighting one of the game’s two super bosses who appears at the end of the devil’s arms quest. The one I linked is an awesome remix of it https://youtu.be/9sZCeUmdbik

Megalovania s-tier music

This is a remaster of a boss theme I am super nostalgic for (the prelude ends around the 3 minute mark): https://www.youtube.com/watch?v=pblYVxLli1U Also quite possibly the hardest main game final boss I have faced in an rpg, so felt very accomplished after the win. Don't know if its my all time favorite, but its up there.