The Barons were described by the UAC as being the highest ranking demons in the order of the Hell knights. They were never observed to leave Hell, and the Lazarus Project was never able to capture any specimens in their tethering expeditions due to their violent, powerful, and elusive nature. At least one manned expedition, designated MTC 2145/128, was believed to have been lost due to an attack by barons.
Demonic tablets found during the automated survey of 2143 describe the barons as being the royal guard of the dark lord of the fourth age of Hell (Possibly Satan Himself), an entity on which the UAC had little reliable data. Their power is described as having grown as compared to the past, and it is surmised that this power increase is correlated with their master's status.
There is also a removable base included
Video of the construction process: https://youtu.be/Ol2ErjQv2dg