Chaos Saber comes from Undertale, the 2015 role-playing game by Toby Fox, where Asriel Dreemurr uses it during the game's final boss encounter as the God of Hyperdeath. In battle, he summons star-shaped projectiles and sweeping saber attacks, and this short effect captures that moment of overwhelming magical force. Fans later clipped it for edits, gameplay videos and soundboards, where it became a shorthand for a dramatic, overpowered attack. It remains popular because Undertale's final battle is still widely replayed, memed and remixed online.