Prior to the [[Horus Heresy]] and before [[Konrad Curze]]'s death, '''Acerbus''' acted as a [[Captain]] in the [[Night Lords|VIII Legion]]. He seemed to have a long-term rivalry with [[Zso Sahaal]], the [[First Company]] captain. Acerbus claimed that [[Night Haunter]] foresaw Sahaal's disappearance and allowed it to happen, so that his "worthy witterings" would not obscure his vision.{{Cite this}} Acerbus also claimed that Night Haunter wished for his [[legion]] to sow fear in his name and eat the terror of the Imperium, which conflicts with Sahaal's claim that Curze used fear as a tool, but it was never his ultimate goal.{{Cite this}}