The album's lyrics, written by David Vincent, draw heavily on occult, mythological, and Satanic themes, including
theistic Satanism,
Sumerian religion, and
Nietzschean philosophy. Michael Nelson wrote that part of the success of the album was due to the band's success at reflecting these themes musically, particularly due to Trey Azagthoth's guitarwork. Writing for
Stereogum on the album's 20th anniversary, Nelson described Azagthoth's work: "His guitars seemed to mimic surreal horrors of nature — whirlpools or wildfires — more than they did any musicians of his era. At the time, the most celebrated guitarist in death metal was
Chuck Schuldiner of
Death, a dazzlingly proficient hyper-shredder with few technical equals. Azagthoth, on the other hand, delivered queasy, nitrous leads that called to mind the most extreme work of
free-jazz/
grindcore saxophonist
John Zorn." An entry on
AllMusic explains that "Guitarist Trey Azagthoth plays complicated, heavily detuned riffs, some with a lightning-fast picking style and others in a slower groove. Drummer Pete Sandoval is one of the genre's fastest, and his jackhammer style helps complete Morbid Angel's core sound." The album also serves as a rejection of many mainstream musical conventions, and, Nelson of
Stereogum also describes, "is never a catchy record. That's partly because the album is essentially devoid of anything resembling a traditional 'chorus,' but it's mostly due to the uppermost layers of sound — the things on which the ear and imagination immediately focus.
Covenant squeals and reels wildly; the band's odd and ever-changing time signatures leave little room for grooves." == Artwork ==