Internal threats
Introduction
These are enemies that exist within the borders of the Empire. Some of these groups are closely tied to one or more nations (for example, the Feni are mostly active in the Marches) but they are intended to be used as threats to any nation - the Feni have effected the Brass Coast already, and it is easy to see how they might cause trouble in Wintermark, for the Navarr, or in Dawn.
Bandits
Large parts of the empire are barely civilized - away from Anvil and the cities of the League there are bandits and bands of orcs that survive by robbery and raiding. Human bandits will usually be small bands of local malcontents and criminals, but almost any permutation is conceivable. A band might be led by a powerful sorceror, a religious fanatic who has been declared a heretic or the mad servant of an Eternal. Bandits in Empire fill the normal LRP trope for bandits they are a simple resource for plot writers who need to give a plot some muscle for any reason.
Orc bandits may be more complex, they could be renegades who refused the offer of the Imperial Orc egregore to join the Empire, they could be warriors who fought their way out of slavery decades ago and still harbour a hatred for their former masters. They could be raiding parties from Jotun, Druj or the Thule. They could be an independent tribe of barbarian orcs who have no other way to survive. They could be receiving aid from enemies of the Empire, foreign powers, Eternals, secret societies. Like human bandits there are many different wants for writers to use them - and like human bandits you can justify their presence virtually anywhere in the Empire that you need them to be.
Sovereigns
Sovereigns are a peculiarly Varushkan threat - they are extremely powerful - but their influence and focus is highly localized - usually to a single Varushkan vale - or a few vales or region at most. Although we don't have Vampires in Empire, the classic concept of Dracula in his castle, ruling over the valley is the iconic image of a Varushkan sovereign.
A sovereign is a great antagonist for any plot that is set in Varushka. They don't work well in other contexts because they are largely indifferent to anything that takes place outside their domain, but they are perfect for any plot that needs a powerful local threat anywhere in Varushka.
Volodny
The Volodny are another Varushkan based enemy, but unlike the Sovereigns they view the entire Empire as their enemy and respond accordingly. The Volodny are powerful ritual magicians and should be portrayed as intelligent, cunning and utterly ruthless. They are driven by a desire to destroy Varushka and the Empire, but most of them are not fanatics.
There are only a handful of true Volodny, so they are likely to use other groups to fight for them, bandits, barbarians, and any Varushkan or Imperial citizen with an axe to grind. The Volodny are a great resource to use for any Empire spanning conspiracy, where a powerful individual is working behind the scenes to do the Empire harm.
Feni
The Feni are human barbarians most commonly encountered in wild places of the Marches and occasionally other parts of the north-western Empire. They lived in much of the area that is now the Marches since before the first Marchers arrived in those lands and drove the orcs out. History suggests that some of the Feni tribes were once the subject people of the orcs who occupied this area. They seem to have a clannish structure, with individual groups of Feni being geographically and socially separated from others.
The Feni are largely inspired by picts, they have clan structures and occupy the wild spaces in the Marches but will raid Wintermark, the League and the Brass Coast given half a chance. They have an abundance of herbs but a chronic shortage of metal weapons and armour. The Feni can fill some of the same roles as bandits and barbarian orc groups but albeit with a narrower geographical focus. At present the players have little information about the Feni, so it is possible for plot writers to develop them further.