Shrine Guardian Seth is, in every sense of the word, a standout boss in Hollow Knight: Silksong. He's not one of the hardest bosses in the game, but he is one of few enemies to talk to Hornet directly, instead of just attacking her outright. He's one of the few to have an entire sidequest line even after his defeat. And the music during his boss fight is unusually slow, simple, and even a little sad.