Fantômas is an avant-garde metal band from California, USA formed in 1998 when Mike Patton, previously famous for the multi-million selling Faith No More and art-rock heroes Mr. Bungle, composed a handful of experimental metal songs. Patton then sent the original compositions to musicians he thought would be right for the job, guitarist Buzz Osborne (of sludge outfit Melvins), his childhood friend and ex-bandmate bassist Trevor Dunn (of Mr. Bungle) and drummer Igor Cavalera (from thrash metal band Sepultura), but Cavalera rejected his offer.