We're one step closer to crowning the Best Debut Metal Album of All Time! The Metal Madness tournament began with 32 entrants and after some fierce competition, only four albums remain!

Black Sabbath's eponymous album will represent the Headbanger Region, going up against Mosh Pit Region winner, Iron Maiden's Iron Maiden. The next matchup finds Dio's Holy Diver, the Stage Diver Region winner, squaring off against Megadeth's Killing Is My Business... And Business Is Good! from the Devil Horn Region.

Hit the red button below to start voting in the Semifinals and remember you can vote once per hour until 10AM ET on Thursday, March 30, so vote early and vote often to send your favorite albums to the Championship round!