Black Cobra is a doom metal and sludge band from San Francisco, California. The band was formed in 2001 by Jason Landrian and Rafael Martinez (who was also the former bassist for Acid King). After logging several years of experience with sludge metal icons Cavity and doom prognosticators Acid King, among other bands, New York-based vocalist and guitarist Jason Landrian and L.A.-based drummer Rafael Martinez began working in 2001 on a new project that would ultimately become known as Black Cobra.