Ludwig, the Accursed and Holy Blade's theme from the Bloodborne: The Old Hunters DLC. The first phase theme does a great job of instilling a sense of dread inside you, especially after the intro to the fight. Seeing this hulking, warped monstrosity standing in front of you, letting out a scream of pain or madness, maybe both. Then, the second phase starts. After a short cutscene, Ludwig, the the first hunter of the Healing Church regains his lost humanity after looking into the blade of the Holy Moonlight Sword, his "true mentor" and "guiding moonlight." Once the music picks up in the second phase, him towering above you, wielding the blade as he once used to, the fight transcends to a new level of badass. Dodging through his energy slashes, landing blow after blow whilst avoiding his sword swings... it's all amazing. Ludwig has to be my favorite boss out of all the Soulsborne bosses.