Arena of Valor is a popular mobile multiplayer online battle arena game, and its in-game announcer calls out major moments during matches, including high kill streaks. The Legendary call is one of those hype announcements, heard when a player dominates a fight, and players quickly began lifting it from gameplay for edits and highlight reels. It spread through gaming videos and short-form clips because the single word instantly communicates dominance without needing context, and it remains a shorthand for an unstoppable run in mobile gaming content.