C'Thun is one of the Old Gods of the Warcraft universe, a vast, corrupting entity sealed beneath Azeroth and best known as the final boss of the Temple of Ahn'Qiraj raid in World of Warcraft. The repeated chant turns that lore into a compact audio meme, instantly signalling an ancient evil waking up. Gaming creators reuse it because the name alone carries menace, even for viewers who have never played the raid, and its short length makes it easy to drop into edits, streams and reaction clips, much like other World of Warcraft meme chants such as Leeroy Jenkins.