Tephaine System

The Tephaine System is a Calixis hive-and-garden well on the edge of the Adrantis Nebula, four worlds that feed and house the sub-sector rather than starring in a crusade. Hive world Tephaine sits with agri-worlds Siculi and Tephaine Minor and the pleasure world Reth.

Siculi's lakes grow protoalgia. Reth is where Calixis money goes to forget the nebula next door. Nearest famous neighbour is Baraspine. This overlay does not invent a Black Crusade here.

The Tephaine System still matters as an Adrantis address Dark Heresy actually uses. Unofficial summaries keep the Adrantis Nebula parent and refuse to promote Reth into a shrine world.