I happened across this little gem last summer while I was diving into the 60's and 70's psych rock and proto metal. Since then, it's become one of my most played and enjoyable albums found during the dig.
In Anadi's Bower was released in '72, not long after Black Sabbath's debut. However, this is no Sabbath clone. Although Lucifer Was contains tinges of the Sabbath sound (you'll hear it in Darkness very well), along with a hint of Jethro Tull with the use of the flute, they're more of a prog rock band rather than proto metal or psych band. Which begs to question how I found it during my psych rock and proto metal treasure hunt, but it doesn't really matter.
The title track is amazing and also contains slightly heavier and haunting guitars. The band also employs the use of odd instruments like the Mellotron on the album.
If you're into the early rock and proto metal, you'll enjoy this. It's not as "progy" as most prog rock bands, which I tend to be rather picky about and I know others are too.