Agonizer was born in spring 1998 in Pyhäsalmi. In the end of 1998 the band recorded it"s first demo called "Eternal Night" which got many positive reviews. In 1999 the band wen"t again to the studio to record new material. Second demo "Last Sign of Light" was born. It got a honour-mention at Soundi-magazine.Third demo was called Lord of Lies. It also received good reviews. But demos Cain and World Of Fools were the band's ticket to greater success.