Devisiun is an artificial planet in a binary star system, home to the Devisen Twins.

It was built by as a testbed by a Quintesson committee.
The star system is blanketed by strange radiation, deadly to organic life, and a hazard to FtL travel.

The Quintessons used Devisiun to test an alternate form of Spark production.
Vector Psi, the control system for Devisiun, doesn't contain an Origin Matrix.
Instead it uses a Spark Propagule, dividing the same base Spark repeatedly.

This alternate process was considered a failure, as it only produced Sparks of low Magnitude that almost always underwent post-insertion mitosis.

Since the Revolt, Devisiun is free of Quintession control and unsupervised.