Monster Kill comes from Dota 2, Valve's 2013 MOBA, where the default announcer calls out kill streaks as they climb. The sequence builds through Dominating and Mega Kill before reaching Monster Kill, then Godlike at the top end. The phrasing borrows from classic arena shooters, especially Unreal Tournament, which popularised booming streak announcements. Clips of the Dota 2 line spread through highlight videos, streams and soundboards, where the short, booming call became shorthand for any run of unstoppable success, in games or in everyday competitive moments.