Well, well, well. It looks like Ozzy Osbourne has his toughest challenge yet: himself! The Prince of Darkness squares off against Black Sabbath in this Semifinal round of our Most Haunting Halloween Track tournament!

Ozzy's "Bark at the Moon" edged out King Diamond's "Halloween" for its second victory in the Most Haunting Halloween Track tournament. It's going to be hard to take down the opening song off Ozzy's third album and first with guitarist Jake E. Lee. The opening round saw the song defeat Iced Earth's "Dracula," and now "Halloween" will join "Dracula."

Black Sabbath's "Black Sabbath" overwhelmed the new sensation Ghost with a thorough defeat of "Ghuleh / Zombie Queen." The song took just over 75 percent of the votes as it picks up steam looking to squash "Bark at the Moon" next. "Black Sabbath" is a 45-year old metal classic that will be hard to take down.

Ozzy Osbourne's "Bark at the Moon" or Black Sabbath's "Black Sabbath?" Cast your vote for the Most Haunting Halloween Track in the poll below! Voting for this round closes on Friday, Oct. 23, at 9 AM ET. Fans can vote once per hour, so keep coming back to make sure that your favorite Haunting Halloween Track wins!

Ozzy Osbourne, "Bark at the Moon"

Black Sabbath, "Black Sabbath"

See Every Matchup in the Most Haunting Halloween Track Tournament