For several years the group was the most prominent act of its style in the country with one founding member going on to record and perform with several Norwegian black metal bands including Dimmu Borgir.
By then, Astennu had virtually completed his first Carpe Tenebrum album Majestic Nothingness with vocal contributions from Nagash of Dimmu Borgir, the guitarist for the band he would then join in 1997.
Earlier in 1999 Marsh had joined another black metal act called Crucible of Agony who had played a support show with Impaled Nazarene and recorded several tracks, one of which, "Come Forth to the Lands of the Plague Bearer", would also appear on Under the Southern Cross.
Along with Marsh, Darael and Shaun, the group now consisted of Beau Dyer from Elysium on bass and two members of Canberra band Psychrist, Yuri Ward and Glen Blazejak, on guitar and drums respectively.
Astennu was fired from Dimmu Borgir in 1999 and since returning to Australia has recorded a third Carpe Tenebrum album and played in bands including Infernal Method and Stronger Than Hate but since 2003 has concentrated on sound engineering.
In February 2024, Astennu announced on his Youtube channel, two founding members Jamie Marsh and Incubus quit the band due to creative differences, and was replaced by new vocalist JS Decline and bassist Habatu.