MF DOOM is the man in the iron mask. The most mysterious figure in hip-hop has also become one of the most popular, supplying beats and rhymes for Gorillaz, De La Soul, Madlib, Danger Mouse, and WuTang Clan, and drawing praise from heavyweights like Just Blaze, Nas, and Mos Def.Since 2002, DOOM has released numerous volumes of Special Herbs, one of the longest-running instrumental series in hiphop history. Now,