Mu is a lost continent that now lies at the bottom of the Pacific Ocean. It is connected to numerous aspects of the Mythos.
Mu is the name of a suggested lost continent whose concept and name were proposed by 19th-century traveler and writer Augustus Le Plongeon, who claimed that several ancient civilizations, such as those of Egypt and Mesoamerica, were created by refugees from Mu—which he located in the Atlantic Ocean. Queen Móo & The Egyptian Sphinx. This concept was popularized and expanded by James Churchward, who asserted that Mu was once located in the Pacific Ocean.
H. P. Lovecraft (1890–1937) featured the lost continent in his revision of Hazel Heald's short story "Out of the Aeons" (1935). Mu appears in numerous Cthulhu mythos stories, including many written by Lin Carter.
In the Mythos Edit
The Muvians mainly worship the ghastly Ghatanothoa (trapped under mount Yaddith-Gho) though there are some who oppose this prevailing religion. Among them are T'yog the high priest of Shub-Niggurath  and Zanthu the hierophant . In trying to free his god Ythogtha and restore his cult Zanthu accidentally causes the destruction of Mu .