Mr. Niebla (born February 22, 1973) is a Mexican Luchador Enmascarado (Spanish for masked professional wrestler). Mr. Niebla's real name is unknown, as is the tradition in Lucha Libre for masked wrestlers. Niebla is Spanish for "Fog". Mr. Niebla is mostly known for working for Consejo Mundial de Lucha Libre (CMLL) from the early 1990s until 2007 and again from 2008. From 2007 to 2008 Mr. Niebla worked for CMLL's main Mexican rival (AAA) where he was part of the stable Los Vipers. On his return to CMLL he was one of the founding members of a stable known as La Peste Negra (Spanish for "the Black Plague").