The name, frontman Dagon later explained, was chosen because it represented humanity's "need to establish dominance, control and order based on a particular period of our world's history.

Dagon has suggested that the band's formation in Colombia and subsequent development in the United States affected Inquisition's sound.

"[5] Recalling "seeing people get shot and stabbed [by] the Cali and Medellin cartel",[5] Dagon portrayed the environment surrounding the band's formative years as "true darkness in flesh and blood.

On January 22, 2018, the band released an official bootleg live album titled Demonic Ritual in Unholy Blackness; the performance took place in Padua, Italy on September 25, 2010.

On March 26, 2018, the band was dropped from Season of Mist, from a tour with Satyricon, and from that year's Maryland Deathfest as former allegations of possession of child pornography from 2008 were brought up against Dagon.

[6] As revealed to be in the public record by metal news website MetalSucks, Dagon pleaded guilty to Unlawful Display of Sexually Explicit Material and Obstructing a Law Enforcement Officer in a plea bargain after the National Center for Missing & Exploited Children detected an account uploading sexually explicit photographs of "young females in their early teens or pre-teens" to the photo-sharing website Photobucket in November 2006, the account being traced to Dagon.

A subsequent investigation of his computer revealed as many as 2,000 files recovered depicting Inquisition, Dagon and his wife, and more child pornography, involving both young girls and boys.

Dagon explained that thrash "had gotten stagnant",[1] which led him towards black metal as it was a "guitar-driven" form of music that did not sound so "dated" and "uninteresting".

[1] The band described their sound as black metal with "slow, deep and dark riffing", "sudden tempo changes", and "melodic solo[ing]".

Dagon explained that he and Incubus "had too many problems finding a bass player years ago" and gave reasons ranging from drug addiction to the absence of a complementary ideological orientation.

[13] Responding to the comparison, Dagon described the intent and history of his approach: Back in the day when I was thinking about a vocal style for Inquisition, I came to the conclusion that I did not want something screamed out at [the] top [of my] lung[s].

So many people were doing that, and still are, and identity is important to me, so I figured what can I do that the majority are not doing; meanwhile I kept hearing this idea in my head of a spoken like inhuman form of vocals chanting over very heavy and at times fast music creating a contrast.

That's why when people say it sounds like a frog or anything else I feel I obtained what I wanted, I achieved that goal of keeping the human factor out of the vocal chants.

The Baroque composers took music to a level never seen or heard before, light years ahead of its time, and also served as the core of inspiration and influence on the period that followed.

[12] Dagon cited "demonic art" such as "old diabolic woodcuts made in times when Satan was a real threat to people" as well as books on the occult, black magic, and demonology as lyrical inspirations.