The band Inquisition was formed in 1988 in Cali, Colombia by Dagon. The band started as a thrash metal act, and in 1994 evolved into raw black metal.

In 1996, Dagon left Colombia and moved back to the United States to continue Inquisition and search for a new drummer. That same year Dagon met Incubus, who joined the band on drums and the creation of their debut full length album began. This line-up has remained stable for more than fifteen years and is now seen as the classic Inquisition line-up.

INQUISITION style of black metal involves slow, deep and dark riffing combined with sudden tempo changes to faster sections based around blast beats and high-speed riffing; at times adding melodic solos. The classic Inquisition sound incorporates a combination of early era thrash metal-influenced riffing with darker and more chaotic black metal, primarily involving fast, tremolo picked minor-key guitar riffs, thus creating the trademark "Inquisition sound".