This sound comes from League of Legends, where the in-game announcer calls out “Legendary” when a player reaches a top kill streak without dying. The line became widely recognized through gameplay videos, streamer highlights and meme edits shared across gaming communities. It still gets used because the single word is instantly understandable, dramatic and flexible, whether the moment is a genuine skill play or a joke edit about someone acting like a champion. It sits in the same family of recognizable game callouts as Enemy Spotted.