Metallica 's Kirk Hammett named one particular guitar riff that he believes "shifted heavy metal." ...

on The-Art-of-Guitar channel, you might have caught one of his “Bad Tab” series ... Take Blackened, from Metallica’s …And Justice For All. That opening riff was infamously tabbed in ...

And of course, Hammett says Black Sabbath’s first three albums “are like gospel” to metalheads. Specifically, the Exodus co-founder lists the 1975 song “Symptom of the Universe” as one that changed ...