Heh, I was just listening to that for the first time. Stoner shit isn't my thing, but I thought it was good listening. Kind of some Soundgarden, C.O.C., Down influences. A bit on the simple side but well-done and nice production, though the vocals are more or less an afterthought. That's okay by me, just something I noticed.
It's pretty crazy that the spells/invocations/rites from the Necronomicon were the main inspirations for the music and lyrics. That book is fucking crazy.