Black Sabbath guitarist and master of the riff Tony Iommi ran away with his victory against Morbid Angel's Trey Azagthoth in Round 1 of our Greatest Metal Guitarist competition. Iommi has continued his legacy as a metal god with Sabbath's newest album, '13,' proving that despite his recent battle with cancer, the heavy metal strummer is as vital as ever.

According to some, our Round 1 matchup between Steve Vai and Synyster Gates ended in an upset, but thanks to the dedication of Avenged Sevenfold fans, Synyster Gates now finds himself in Round 2. Gates will soon be heard on A7X's 2013 album, 'Hail to the King,' with more celebrated shredding sure to come.

Tony Iommi vs. Synyster Gates? Cast your vote for the Greatest Metal Guitarist in the poll below! Voting for this round closes on Sunday, July 28 at 11:59PM ET. Fans can vote once per hour, so keep coming back to make sure that your favorite metal musician wins!