An unaligned race train. The Mirage is a bit of a hodgepodge, being built from the hull of a Frameshift-class Renatean locomotive, while the components come from all over: bogies, driving wheels, and gearbox from the Paragon forges, patching-plate for the rusty boiler and booster thermal cells from Celestria, tracking gear and camera uplink from Centralia, and the storage car rebuilt on the rotted skeleton of a Feldspar passenger coach.
It’s a mess, but it’s a shared mess, and most importantly, it runs. It runs like no other locomotive on the rails: terrifyingly fast, and with nightmarish acceleration for a steam locomotive.