The manticore comes from ancient myth, described as a lion-bodied beast with a human face, carried into modern fantasy through bestiaries, novels and role-playing games. This particular recording circulates online as a stock fantasy creature effect rather than a line from a film or show, which is why tabletop streamers and indie game editors reuse it freely. Its lion-based roar design reads instantly as a large predator, so it keeps getting picked for monster reveals, D&D encounters and fantasy animatics where a generic dragon roar would feel overused.