Come to the Sabbat (4:09)

For it’s time quite musically sophisticated and can still raise the occasional shiver, all together still enjoyable (have to wonder if it’s still as good as it used to be at clearing Jesus freaks out of clubs).

Bizarrely enough, also notable for being a Top 10 hit in New Zealand in 1971 with a kick-ass cover by Wellington band Timberjack, which is available for listening on youtube.