Terhen was formed in January 2004 under the name Thamuz. Their origin is Kangasniemi, Finland. They had some disagreements in choosing the music style and there were also some problems with the members at the begining. The band made four songs and in May 2004 they recorded them for rehearsal purposes only. The demo represented their interests in strong black/death metal influences. After having written some new material Thamuz got the opportunity to make a music clip for a fashion show in Beijing. The show succeeded well and the band was satisfied with using this unusual way of promotion.