Final-Boss-Chan is a track by Japanese electronic producer Camellia, included in Beat Saber OST 5, the soundtrack collection for the virtual reality rhythm game Beat Saber, where players slash blocks to the beat. The full track is known for its relentless speed and boss-battle intensity, which fits the game's hardest charts. Short excerpts have since circulated on soundboards and in creator videos, where the burst of energy works as an outro or closing sting. Its recognizable, high-pressure sound keeps it useful long after its original game release, especially for gaming edits.