In the following years, the band experienced several line-up changes, with Infernus being the only original member to continue in the band. Joining members of black metal bands such as Ulver, Immortal, Enslaved, and Molested, he also participated as bassist on Borknagar's self-titled debut album, released in 1996. After signing a deal with German label Malicious Records, Gorgoroth released the albums Antichrist in 1996 and Under the Sign of Hell in 1997, with Infernus responsible for all the music and also the majority of the lyrics, as well as doing both guitar and bass duties on the albums.
In subsequent years, the band underwent multiple lineup changes, with Infernus being the sole original member to remain. He joined members from black metal bands like Ulver, Immortal, Enslaved, and Molested, playing bass on Borknagar's self-titled debut in 1996. After signing a deal with German label Malicious Records, Gorgoroth released Antichrist in 1996 and Under the Sign of Hell in 1997, with Infernus handling all music and lyrics, as well as playing both guitar and bass on the albums.