Extra Credit: Ludicra

Ludicra was a black metal/avant-garde metal band from San Francisco.  They formed in 1998 and sadly broke up in the summer of 2011.  The good news, however, is that the band's back catalog plus some live performances are available for free downloads at the Ludicra bandcamp page.
If you're new to Ludicra, then I'd suggest starting with the group's most recent release, 2010's The Tenant.  From there, simply work your way back.