This sound comes from League of Legends and is part of the game's well-known announcer system that calls out major events during a match. The enemy double kill line became recognizable far beyond normal gameplay through montage edits, streamer compilations, and meme posts built around sudden collapse moments. It still gets used because even non-players can understand the meaning immediately: the other side just scored twice. In gaming edits, it often fills the same dramatic reaction role as an enemy spotted alert or a danger alarm sound effect meme.