The Nazgul come from J. R. R. Tolkien's The Lord of the Rings, where they are the nine servants of Sauron, once kings corrupted by rings of power. Their shrill cry became widely recognised through the film adaptations and is now reused online far beyond fantasy edits. Short clips circulate as a scream meme for moments of pursuit, panic or mock horror, because the sound alone signals a relentless hunter approaching. It stays popular in gaming and movie edits where a brief, theatrical scare is more useful than a long build up.