It might not be as important to the Celtic Frost/Hellhammer legacy as its immediate predecessors, but To Mega Therion is still a fine work of metal 30 years (and four days) after its release. Many early underground metal recordings are noted for stripping their musical content to a bare minimum of function and simultaneously exploring new methods of arrangement and songwriting. To Mega Therion, on the other hand, takes a step towards refining the new standard, with more elaborate instrumentation, production, and songwriting than the EPs that came before it. It’s still more restrained in its aesthetic exploration than anything else Celtic Frost released, but listeners can easily hear how some of the more obvious experiments here (timpani, occasional female vocals, etc.) anticipate elements that would become fixtures in the band’s later works, and furthermore in the plethora of subgenres to follow.