Octarius System

The Octarius System is the Overfiend's capital well in the Octarius Sector, a mountain-continent gravity well whose principal world is also called Octaria or Octavius. Inquisitor Kryptman steered Hive Fleet Leviathan into this Ork empire on purpose.

Tenebra Prime shares the same charted well. The Swarmlord eventually isolated and killed the Overfiend, and the capital fell after years of the Imperium watching two xenos kill each other. The experiment did not stay inside the sector.

The Octarius System still matters as the meat-grinder Kryptman thought he could aim. Unofficial fan summaries keep the Octarius Sector parent and do not treat the pin as a quiet greenskin backwater.