"We were getting into coke, big time", Ward explained. "Uppers, downers, Quaaludes, whatever you like. It got to the stage where you come up with ideas and forget them, because you were just so out of it". Produksi rampung ing April 1971, ing band dirilis Master of Reality, mung enem sasi sawise US release saka Paranoid Bang. Album iki ngrambah ndhuwur sepuluh ing AS lan Inggris, lan Black Sabbath iki certified ing kurang saka rong sasi, pungkasanipun nampa Platinum certification ing 1980s charting lan Double Platinum ing awal abad 21", nerangake Ward. "Children of Grave, band iki diwenehi respon paling umum lan paling disenengi ing taun 2003 karo Rolling Stone, kang diwenehi nomer siji ing daftar 500 songs. "Ing wektu sing padha karo Rolling Stone, band iki diwenehi respon sing paling apik ing taun 2000an, nanging padha diwenehi nomer siji ing daftar lagu-lagu sing paling nyenengake ing taun 2000an, kayata "Children of Grave" lan "Children of Grave".
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