Sepultura, Territory (Chaos A.D., 1993)

The riff that begins at 2:33 is one of their best ever and crushes my frickin brain every time I hear it. The percussion on this album was a revelation and showed the evolution that a lot of metal bands undergo as they relax their rigid metal compositions and move to a more instinctive sound reflective of their own country's idiomatic musical heritage. This is interesting, but doesn't always produce the best metal; Metallica's move to nylon strings and an overall more country sound in some of their work being the best example). In this sense Chaos A.D. was Sepultura's Archaeopteryx in their transition from straight ahead death-thrash on Arise, to a uniquely Brazilian grind on Roots.