- Itinerant Kastelan Robots are said to be older than the Imperium and many call no single Forge World home. Bands of these machines may appear in battle and join to congregations of the Cult Mechanicus or allies of their to help them. A phenomenon taken as a sign of great favour from the Omnissiah.
- Unlike regular Kastelan Robots, the Itinerants act of their own free will. As such they allow themselves to be directed by local Tech-Priests and fight on until the batlle is won. After that they dissapear as mysteriously as they previously arrived, their duty to those in need done.
- Very resilient and effective at both melee and ranged combat. Can be upgraded to be more effective against Vehicles and Buildings.