Space Wolves - Specialist Formations: Consul Opsequiari -  The Consul Opsequiari was a battlefield overseer, granted the power of life and death over his brothers. The kill-urge always ran hot in the Space Wolves and until Leman Russ taught his gene-sons how to fully control these desires for blood, these officers of the Legion killed those among their brethren deemed too unstable for effective service in the Legion. Clad in utilitarian charcoal grey power armour bare of any ornamentation, save a squad symbol on their breast and a Terran Raptor Imperialis ornament, these officers carried out their solemn duty within the ranks of the Legion. Reorganisations and the changes in Legion culture made upon the reunification of the VI Legion with their primarch ultimately made this position obsolete before the onset of the Horus Heresy.Varagyr Wolf Guard - The Varagyr were the chosen warriors of Leman Russ, hand-picked from his own Great Company to form his personal Honour Guard and close companions in war and council. To have attained such a rank and position, each had distinguished themselves in battle many times over, and each had forged their own saga worth the telling. More so than any other of his sons they were the wolves of his Pack, marked by the great beast pelt which adorned their armour. To adopt this honour meant more than simply to walk in the Wolf King's shadow and lay down their lives for him. It meant that at least for a time they had foregone the chance to lead their brothers in battle, to watch while others struck, to stand fast and not seek out the glory of battle save when their lord commanded. When such coldly withheld fury was unleashed, however, it fell like a thunderbolt against the foe. The charge of the Varagyr was terrible to behold, a tide of armour-clad, beast skin-draped hulks propelled by superhuman strength and inhuman ferocity. Given sufficient momentum to aid their charge, the Varagyr struck their foes like cannon shells, crushing and killing their enemies before even their fearsome blades struck. Though all served the Wolf King faithfully and with fealty as his guard, the Varagyr also took great satisfaction in showing their superiority to the petty lords and champions of those they slew, vying to honour their master with the trophies of the slain justly anointed in the blood of the vanquished in the hopes of making a tale worth the telling.Priests of Fenris - The Priests of Fenris existed as a series of interconnected orders which provided for the physical, spiritual and technological needs of the VI Legion. Occluded to outsiders beneath webs of what outwardly seemed superstition and barbarism, they were more than technicians and specialists, but instead the repositories of the Legion's true history, the keepers of its secrets and the masters of its lore.Speaker of the Dead - These Priests of Fenris were the predecessors of the present era's Wolf Priests, but more akin to an Apothecary. They were chosen from the most strong-willed and coldly self-controlled of the VI Legion's brethren, to serve as its masters of discipline, instillers of its culture, wardens both of the gene-seed and the memory of the Legion. A Speaker of the Dead was charged with overseeing the implantation of the Legion's gene-seed into potential Aspirants as well as monitoring the physical and mental well-being of their fellow warriors. The Speakers of the Dead were also entrusted with the vital task of training new waves of the Legion's warriors and the watching over of its ranks for dangerous incidences of instability, either mental or physiological. In battle, they carried a variety of sophisticated biogenic and alchemical tinctures whose use was masked in primitive ritual in order to temporarily abjure hideous injuries incurred on the battlefield. These priests walked the path that threaded between both life and death, memory and oblivion, and while their healing balms might bring a warrior back from the brink of death, their garm-blood vials symbolised the other side of that coin; in it was a bitter poison that brought on a terrible death. It was they who encoded the Legion's history within memetically-patterned "sagas", and who recorded and judged the deeds both of the living and the dead so that the honoured might be remembered and the dishonoured despised.Caster of Runes - These were the predecessors of the modern era Rune Priests. They were undeniably an order of psykers who considered themselves a breed apart from the Librarians of the other Legions. Those chosen as the Casters of Runes had the psyker's gifts, but treated them warily as a potential curse as well as a blessing, reaching for their power only through a deliberate skein of cognitive shielding within their own minds, and aided by a unique lattice of psycho-memetic pattern field technology incorporated into their armour as a safeguard both against hostile outside forces and drawing down too much power themselves. They manipulated their powers through these little-understood runic matrices and adapted Fenrisian rituals, and provided the VI Legion with prognostication and shielded it from Empyreal threats.Priest of Iron - The Priests of Iron were the predecessors of the present era's Space Wolf Iron Priests. They were the masters of the Legion's armouries, its war machines and the technological arcana of the Space Wolves Legion. They masked their technological lore behind an outwardly barbaric show of tech-mysticism whose temper -- if not form -- would do justice to the most obtusely arcane Adept of Mars. Their role was not simply to supply their Legion with arms and maintain their wargear, but ensure it was as self-sufficient as possible. They also stood guard over certain troves of weaponry and schematic patterns gifted by Terra and uniquely developed by the Iron Priests themselves.Grey Slayer Packs - When their gene-sire Leman Russ took over the reins of his Legion, the Space Wolves had begun to change -- to become a singular hybrid of Fenris' unforgiving and ruthless way of battle and the patterns of more recognisably Imperial military doctrine that had come before. This new Space Wolves Legion was truly a union of neither of those that had come before, but something new entirely, and the increase of so-called "Grey Slayer" Space Wolves was perhaps one of the visible outward signs of the VI Legion's transformation after reunification with its Primarch. Whereas the Terran-style Tactical Squads, decreasingly evident in the VI Legion's order of battle, were disciplined cogs in an intricate machine of war, the Grey Slayers were, in effect compact individual warbands of Space Marines, all but autonomous in their own right in the field: fluid, sure-footed and largely exempt from the reliance on direct commands from above. They were expected to deal with myriad challenges on their own if needs be, and above all to close with the enemy on their own terms; to seek and destroy.Deathsworn Packs - The Deathsworn, known informally as "the Black Cull," were the dark heart of the VI Legion and theirs was a cause that was eventually to find its vent in the transfiguration of the flesh, but long before the first Wulfen, the descent into the depths of the beast, its predatory taint, was found within the minds of those born of the Space Wolves' gene-seed. In every Legion it was said there were those for who the horrors of all they had witnessed and all the bloody deeds they had done in the name of the Great Crusade mutilated their soul and damaged their minds to such an extent that they were no longer men, no longer Space Marines in truth, but something hollow and murderous beyond reason. In some Legions, such things might go all but unnoticed, even perhaps mark one for advancement, while in others, the gift of final peace was offered, or perhaps outcast status as one of the so-called Moritat or a place in the Destroyer units. But within the Space Wolves, such an all-consuming impulse to kill and kill again was better understood, and the ways of Fenris held the answer to such dark souls in the shape of the Cult of Morkai and its ministers, who ensured that those marked by the Death Wolf would be cast upon the enemies of Mankind with proper application of force. The warriors who gave themselves over became the Deathsworn, marked by wolf-skull helms, the embodiment of the spirit of death in the heart of the Space Wolves Legion.Landayvan - A specialist formation unique to the Seventh Great Company, they were the destroyers and layers of waste, and in this company were concentrated many of the Legion's siege warfare and artillery assets, as well as those skilled in the use of such sanctioned weaponry as phosphex.Watch Packs - Even as the VI Legion brought sanction to Prospero during the early years of the Horus Heresy, a handful of Packs were despatched speeding through the Warp on the Imperium's fastest ships. They had been given the duty by the Wolf King to link up with the remaining sixteen Space Marine Legions and take up position as bodyguards, and potential executioners, of the remaining sixteen Primarchs. By the time these "Watch Packs" were assigned, however, most of the Traitors had already chosen to side with Horus. Those Watch Packs who linked up with Traitor Legions almost certainly met a grim end. The Pack that reached the Alpha Legion Primarch Alpharius managed to kill the first officer who presented himself as the Primarch, but did not last much longer and they were run down and slain. The Watch Pack that met with the Blood Angels Primarch Sanguinius was lost during the chaos of the Battle for Signus Prime. The Watch Pack that joined up with the Ultramarines Primarch Roboute Guilliman wound up crossing blades with the Night Lords Primarch Konrad Curze on Macragge and shed blood to protect Guilliman's adoptive human mother. Ultimately the fate of many of these Watch Packs remain unknown, and their duty was a thankless one, but it shows the unquestioned loyalty of the VI Legion and the esteem in which the Legion was held that they were given such a dire task in the first place.Sons of Ymir - The Dreadnought cadres of the Space Wolves Legion were known as the Sons of Ymir.Hrimthursar - The Hrumthursar were the most hateful of all the Dreadnoughts who served the Legion as the Sons of Ymir.Eldthursar - Also known as the Sons of Muspel and the Destroyers of Worlds, the Eldthursar were the most violent of the Dreadnoughts who served as the Sons of Ymir. Most often these warriors had suffered terribly before being placed within the Dreadnought's sarcophagus and the pain of their mortal wounding drove them to bouts of killing mania when left conscious. Rarely were they awoken from their slumber unless the Legion required the utter annihilation of an enemy, for these war engines were never subtle weapons.