Exhumed: Leviathan

Any hope of subduing him is false; the mere sight of him is overpowering.

Leviathan was a heavy prog rock band from Texas who released a single album in 1974. Aside from having a very metal moniker (shared by a black metal band today) and at least one metal song title ("Angel of Death"), they definitely had a very doom metal kind of mood to their music. With the mellotron, it sounds a lot like the retro doom metal bands of today.