The Xana-Vicidex System was a System of the Imperium in Segmentum Pacificus' Vicidax Thule Sector. During the Great Crusade, it was a semi-autonomous region of the Mechanicum but later betrayed the Emperor during the Horus Heresy.
Ultimately the forces of Xana fled to the Eye of Terror where they have established a prominent Daemonic Forge World. Whether this is the original Xana II that was somehow moved or if it was simply a renamed planet has yet to be seen.
- Xana I — macro-magnitude gas giant
- Xana III
- Xana IV