The Unbidden

"We are Alpharius. That is all you need to know."

- Weeper, Champion of the Unbidden

The Unbidden are a sinister band of Alpha Legionaries that have plagued Imperial space for eons untold. Of course, all but the most learned elements of the Imperium are even aware of their existence. Currently this dangerous warband of elite assassins and saboteurs are under the employ of Chaos Lord Xaphuris. For what purpose these agents of the Dark Gods have for throwing in their lot with him, none can say. Perhaps even the great Chaos Lord himself is unaware of their true intentions. What is certain is that they are by far one of the most dangerous forces the Dark Covenant can bring to bear.

Culture
The Unbidden are secretive and aloof by nature, and seem to have no concept of self. They are devoid of the urges for glory and fame as many other warriors of Chaos are. In fact, the warband did not even have a name until they began working alongside the Dark Covenant. Likewise, their Astartes operatives have no known names, and instead are only referred to by various titles that their erstwhile allies have bestowed upon them.

The Unbidden show no emotion, no mercy, no weakness. They fight much like the wind, striking swiftly and with nary a sound. They slay entire armies with but a whisper. And bring ruin with a single detonation. Rarely are they seen in open battle, but when they are they are often the last thing the foe sees.

Their skill and leathality is often magnified by their gifts from the dark gods, scorcerous powers and corrupted artifacts. None of them, however, show any outward signs of mutation. Few of them have any defining symbols or regalia on their armor, though the energies of the Warp has twisted the armor of some into strange and brouqe forms, most wear simple Heresy Era wargear, untainted by anything save the march of time. This has lead many to believe that these warriors are mostly, if not all, veterans of the Long War.

Organization
As can be expected, nearly nothing is known of the Unbidden's command structure. Even their true leader cannot be decided. Surely those uninitiated to the ways of the Alpha Legion would assume that Weeper is the commander of the warband. But even this can be cast into doubt, he may merely be but a mouthpiece for the real commander, a figurehead to draw attention while the true commander lurks in the shadows. Even then, one cannot be certain if the Unbidden even have a commander. As is often the case with the Alpha Legion's most secretive elements, they may simply work cohesively without the petty need for rank and dogma. As evidenced by their tactics they need no voice to command them in battle. Why then would it be so off the field as well?

As is also to be expected, the Unbidden have countless agents and spies within their allies and enemies ranks. Hordes of agents, from lowly cultists, to great generals of the traitor guard. Some even suspect other Legionaries of other warbands to be puppets of the Unbidden, though none are sure.