Avada Kedavra is the killing curse from the Harry Potter books and films, most famously used by Lord Voldemort and his followers to kill instantly with a flash of green light. The spell became one of the series most recognisable lines, and fans began isolating dramatic deliveries of it for edits, reaction videos and gaming clips. The stretched-out, shouting version heard here is a popular meme variation, shared on TikTok, YouTube and soundboards to exaggerate the moment of defeat. Its fame as the ultimate one-hit spell keeps it useful whenever a creator wants an instant, over-the-top elimination.