Originally Posted by adamclark52
So many riffs, so many riffs.
This. It's impossible (and pointless) to go through the hundreds of riffs that would qualify.
With that said, there is only one truly correct answer: Black Sabbath - Black Sabbath. That opening riff is pure evil.
12/5 - Phantom
12/17 - Havok
12/23 - TSO
1/13 - Enforcer, Warbringer, Cauldron, Exmortus
2/27 - Sacrifice
3/4 - Voivod, Vektor