In 1997, Van de Kerkhof left the band because he wanted to play a different style of music. Danielle Claassen (vocals) soon after appeared, with Dirk Verspaget also later joining to fill the drum stool. The band was complete and they changed their name for the last time to Abaddon, still playing black metal. After some time, Claassen decided to quit singing and play keyboards.
In 1998, Abaddon recorded their first demo CD, Into The Twilight Kingdom.
In the summer of 1999 Claassen and Verspaget left the band. Fortunately, a new drummer in the form of Maurits van Sambeek would arrive. A couple of months later, Verspaget was back, this time as a keyboard player. The band was complete again and Abaddon recorded a new demo called Death in Magenta (2000).
In February 2001 Abaddon played with Enthroned (Belgium) on the Extrovertival festival in Lieshout. Because of musical differences, drummer van Sambeek and Abaddon split ways in October 2002 with drummer Ralf Bloemers (ex-Dr. Rock) taking his place for their Previously Unreleased (2003) demo featuring music as the title suggested. The record went nowhere and the band split less than a year later.