The title track is a slow burn, doomy and heavy until the tempo picks up at the end. Hell of an entrance. The Wizard is built around bluesy harmonica and heavy riffing. The guitar tone is insane considering this is 1970. The punishing riffs continue into the long multi-parter next. There's a great bass part about halfway through and then some surprisingly melodic harmonies and soloing on N.I.B. Wicked World is again focused on drilling the bass riffs into your brain. Another multi-part suite to close and it really starts to chug along two thirds of the way through. Geezer Butler's bass is again stealing the show for me. Then we have a bit of a rambling collection of solos but it does come together for one last set of riffs and vocals. As influential as this is, it's also extremely listenable in its own right. I'm not giving 5 stars only because I know there's several albums of theirs I'd reach for first, but it's close.