After listening through the Immortal discography and letting all the material sink in, I've come to the conclusion that Diabolical Fullmoon Mysticism is not only my favorite Immortal album, but also one of the strongest releases in 90s black metal.
Yeah, At The Heart of Winter was enjoyable and Sons of Northern Darkness had some great moments, but it's this album - the debut - that I keep coming back to. I am struggling to understand why it has one of the lowest ratings in the band's discography.
To my ears, Diabolical Fullmoon Mysticism has a unique character and a level of energy, flow and charisma to it that is unmatched by any of their other work. It's so much fun to listen to at any time of the day or year. Short but sweet, it's a real treat.
The Call of the Wintermoon, despite its ridiculous music video, is a hell of a song and one of Immortal's best. Unholy Forces of Evil is packed full of riffs that slay and ferocious vocals. Cryptic Winterstorms keeps the frigid atmosphere going with its brilliant acoustic sections. The drumming of Blacker Than Darkness is insane. "A Perfect Vision of the Rising Northland" is a true epic that takes you on a journey, and one of Immortal's most ambitious tracks in the vein of Bathory. It also contains one of the most climactic moments in the band's history (the guitar solo at the end).
All in all, this is a beast of a black metal release. Most of all, it's FUN to listen to and doesn't take itself too seriously. Highly recommended.