On the strength of his work in Tormentor, he was invited to perform vocals on the De Mysteriis Dom Sathanas album by Norwegian black metal band Mayhem after lead singer Dead committed suicide.

After Mayhem, Csihar continued to work in various bands, such as Plasma Pool, Aborym, and Korog; he also performed as Caiaphas in the rock opera Jesus Christ Superstar in Hungary.

[4] His first recorded collaboration with the band was in 2004 when he sang in the Sanskrit language on the tracks "Decay2 [Nihil's Maw]" and "Decay (The Symptoms of Kali Yuga)" on their album White2.

His live performances have been in support of artists like Ulver on their first European tour, Bohren & der Club of Gore, Lustmord, Ruin and Diamanda Galas.

In 2019 he participated in the live presentation of the album Canticles of the Holy Scythe by (Lüüp, among with a chamber orchestra of a total 14 musicians ensemble.

[5] Outside of music, Csihar graduated as an electrical engineer from a technical college,[6] and used to be a private teacher of math and physics.

In 2018 he was portrayed in the film Lords of Chaos, which depicted the early 90s Norwegian black metal scene (in particular Mayhem).