In 2004, he was joined by singer Nebiros again, and they recruited drummer Tore "Shiva" Stjerna, who had produced the Mystérion Tés Anomias single.
[2] The band's first album Pentagrammaton, which was supposed to feature Moloch of Teitanblood sharing vocals with Nebiros[3] and "mark the ten year anniversary of OFERMOD" in 2006, was "partly finished in late 2005/early 2006", but delayed because "Michayah was sent to prison, for assault, robbery and a few other incidents, in early March 2006".
Belfagor took time to solely re-work the material, which was produced by former Marduk bassist Magnus "Devo" Andersson and released under the title Tiamtü in 2008.
Belfagor claims to write the lyrics in connection with meditation and astral travels and composes the music in semi-trance.
[3][7] Ofermod's musical style supposedly influenced other Swedish black metal bands such as Watain and Ondskapt.
[4] The new tracks on the EP re-release were characterised as "Orthodox Death Metal", "for the band no longer use the word 'Satan' (ha-shatan) as a description of their religion, but leave the holiest essence of the Lord silent, as it forever should be, for it existed before the cosmos and eventually will bring to its primal form: No-Thing = Utter Spiritual Death".