The headline for a story about a fictional band on the fake-music-news site The Hard Times speaks volumes: “Innovative Stoner Metal Album Blends Influences from Black Sabbath and Black Sabbath.” The point being: Many, many metal groups are essentially Black Sabbath cover bands whether they know it or not. While some of these bands are killers in their own rites (get it?), sometimes you really just want to drink from the bloody river at its unholy source. And short of traveling back in time, “Iron Man” style, to the early ’70s and catching the uncut real-deal, all-lady reboot Black Sabbitch is about as close to the Satanic ideal as you’re going to get. The technical ecstasy of their uncanny covers of the hits (“War Pigs, “Sweet Leaf”) and the deep cuts (“Sabbath Bloody Sabbath,” “N.I.B”) would be enough to make Lucifer himself take notice, but frontwoman Aimee Echo’s mesmeric charisma combined with the seemingly effortless explosive chemistry of the band behind her will make you fall in love with the dark side all over again.