This line comes from League of Legends, the multiplayer online battle arena game released by Riot Games in 2009, where an in-game announcer reports kills, objectives and other key events to both teams. The ally version plays whenever a player on your own team is killed, making it one of the most heard announcements in a normal match. Clips of the line spread through gameplay videos, streams and meme edits, where creators reuse it far beyond the game itself to announce any fictional or real-life defeat with the same deadpan authority.
About this sound
The League of Legends announcer line 'An ally has been slain' plays when a teammate dies in a match. Gamers use it to mark a failed play or a lost team fight.
The clip is the calm, authoritative female announcer voice from League of Legends announcing that a teammate has just been killed in game. Delivered in a flat, matter-of-fact tone over a few seconds, it lands with a cold finality that makes a defeat feel official rather than accidental. In videos it works as an instant verdict, turning a clumsy mistake, a lost duel, or a teammate walking into danger into a punchline. Viewers who play the game recognise it immediately, so the joke needs no explanation, while newcomers still feel the sting of the announcement.