Piscina System

The Piscina System is a Segmentum Obscurus mining well about six thousand light years east of the Eye, forever skirmishing with Orks in old mine heads. Piscina IV is the Dark Angels world; Piscina V shares the charted well.

Ghazghkull used it as a staging ground before the Third War for Armageddon. A Fallen plot later forced Chaplain Boreas's garrison to die inside their keep rather than vent a virus bomb across the planet.

The Piscina System still matters as Dark Angels mining turf that Orks and Fallen both treat as a door. Unofficial summaries keep the Obscurus parent and do not file the pin as a second Armageddon.